TY  - JOUR
AU  - Labus, Nebojsa
AU  - Krstić, Jugoslav
AU  - Matijašević, Srđan
AU  - Pavlović, Vladimir
PY  - 2023
UR  - https://dais.sanu.ac.rs/123456789/15141
AB  - Powder mixture consisted of ZnO, Mn2O3 (MnCO3) and Fe2O3 blended powders, was found laminating during compaction. Polyvinyl alcohol (PVA) and a combination of PVA with polyethylene glycol (PEG) added as a plasticizer, were introduced as polymer binders to improve the compaction of oxide mixtures. It has been done by forming a suspension of oxide mixture and varying the polymer solution concentration and composition. By evaporating the solvent, new materials were obtained, which consist of oxide particles bound via polymer. In such a manner obtained hybrid materials were characterized with attenuated total reflection Fourier transformed infrared (ATR-FTIR) spectroscopy, differential thermal analysis (DTA) and transmission electron microscopy (TEM). The oxide polymer material was compacted at 200 MPa and the expansion of this compact during heating was monitored in temperature range up to 550ºC with dilatometer. It was found that PVA forms graft polymer with PEG and specific interaction with oxide particles surface was revealed.
AB  - Смеша прахова састављена од ZnO, Mn2O3 (MnCO3) и Fe2O3 комбинацијепрахова је показивала ламинацију током пресовања. Поливинил алкохол (PVA) икомбинација PVA са полиетилен гликолом (PEG) који је додат као пластификатор, сууведени као полимерно везиво за пресовање оксидних прахова. Везиво је уведено такошто је формирана суспензија смеше различитих оксида прахова у полимерномраствору. Концентрације полимера и састави су варирани. Уклањањем растварачадобијени су нови материјали који се састоје од честица оксида повезаних полимерима.Ови хибридни материјали окарактерисани су методама ометене тоталне рефлексијефурије трансформисане инфрацрвене спектроскопије (ATR-FTIR) као идиференцијалне термичке анализе (DTA). Микроструктура је посматранатрансмисоном електронском микроскопијом (TEM). Оксид-полимер материјали супресовани на притиску од 200 MPa и ширење испреска током грејања је праћено у температурском опсегу од собне до 550ºC употребом дилатометра. Нађено је да PVAформира графт полимер са PEG и да постоји специфична интеракција полимера саповршином честица оксида.
PB  - Belgrade : Association for ETRAN Society
T2  - Science of Sintering
T1  - Oxide Powder Mixture with Poly-vinyl Alcohol (PVA) and added Polyethylene Glycol (PEG) as Plasticizer
SP  - 189
EP  - 2023
VL  - 55
DO  - 10.2298/SOS220828005L
UR  - https://hdl.handle.net/21.15107/rcub_dais_15141
ER  - 

@article{
author = "Labus, Nebojsa and Krstić, Jugoslav and Matijašević, Srđan and Pavlović, Vladimir",
year = "2023",
abstract = "Powder mixture consisted of ZnO, Mn2O3 (MnCO3) and Fe2O3 blended powders, was found laminating during compaction. Polyvinyl alcohol (PVA) and a combination of PVA with polyethylene glycol (PEG) added as a plasticizer, were introduced as polymer binders to improve the compaction of oxide mixtures. It has been done by forming a suspension of oxide mixture and varying the polymer solution concentration and composition. By evaporating the solvent, new materials were obtained, which consist of oxide particles bound via polymer. In such a manner obtained hybrid materials were characterized with attenuated total reflection Fourier transformed infrared (ATR-FTIR) spectroscopy, differential thermal analysis (DTA) and transmission electron microscopy (TEM). The oxide polymer material was compacted at 200 MPa and the expansion of this compact during heating was monitored in temperature range up to 550ºC with dilatometer. It was found that PVA forms graft polymer with PEG and specific interaction with oxide particles surface was revealed., Смеша прахова састављена од ZnO, Mn2O3 (MnCO3) и Fe2O3 комбинацијепрахова је показивала ламинацију током пресовања. Поливинил алкохол (PVA) икомбинација PVA са полиетилен гликолом (PEG) који је додат као пластификатор, сууведени као полимерно везиво за пресовање оксидних прахова. Везиво је уведено такошто је формирана суспензија смеше различитих оксида прахова у полимерномраствору. Концентрације полимера и састави су варирани. Уклањањем растварачадобијени су нови материјали који се састоје од честица оксида повезаних полимерима.Ови хибридни материјали окарактерисани су методама ометене тоталне рефлексијефурије трансформисане инфрацрвене спектроскопије (ATR-FTIR) као идиференцијалне термичке анализе (DTA). Микроструктура је посматранатрансмисоном електронском микроскопијом (TEM). Оксид-полимер материјали супресовани на притиску од 200 MPa и ширење испреска током грејања је праћено у температурском опсегу од собне до 550ºC употребом дилатометра. Нађено је да PVAформира графт полимер са PEG и да постоји специфична интеракција полимера саповршином честица оксида.",
publisher = "Belgrade : Association for ETRAN Society",
journal = "Science of Sintering",
title = "Oxide Powder Mixture with Poly-vinyl Alcohol (PVA) and added Polyethylene Glycol (PEG) as Plasticizer",
pages = "189-2023",
volume = "55",
doi = "10.2298/SOS220828005L",
url = "https://hdl.handle.net/21.15107/rcub_dais_15141"
}

Labus, N., Krstić, J., Matijašević, S.,& Pavlović, V.. (2023). Oxide Powder Mixture with Poly-vinyl Alcohol (PVA) and added Polyethylene Glycol (PEG) as Plasticizer. in Science of Sintering
Belgrade : Association for ETRAN Society., 55, 189-2023.
https://doi.org/10.2298/SOS220828005L
https://hdl.handle.net/21.15107/rcub_dais_15141

Labus N, Krstić J, Matijašević S, Pavlović V. Oxide Powder Mixture with Poly-vinyl Alcohol (PVA) and added Polyethylene Glycol (PEG) as Plasticizer. in Science of Sintering. 2023;55:189-2023.
doi:10.2298/SOS220828005L
https://hdl.handle.net/21.15107/rcub_dais_15141 .

Labus, Nebojsa, Krstić, Jugoslav, Matijašević, Srđan, Pavlović, Vladimir, "Oxide Powder Mixture with Poly-vinyl Alcohol (PVA) and added Polyethylene Glycol (PEG) as Plasticizer" in Science of Sintering, 55 (2023):189-2023,
https://doi.org/10.2298/SOS220828005L .,
https://hdl.handle.net/21.15107/rcub_dais_15141 .

TY  - JOUR
AU  - Nikolić, Maria Vesna
AU  - Krstić, Jugoslav
AU  - Labus, Nebojša
AU  - Luković, Miloljub
AU  - Dojčinović, Milena
AU  - Radovanović, Milan
AU  - Tadić, Nenad B.
PY  - 2020
UR  - https://dais.sanu.ac.rs/123456789/8950
AB  - Iron manganite (FeMnO3) powder with a cubic (bixbyite,−Ia3) crystal structure was obtained by a solid statereaction. Thick film paste (powder+organic vehicles) was screen printed on alumina substrate with test interdigitatedPdAg electrodes. Significant porosity (60.6%) composed of macropores (larger than 100 nm) wasdetermined by Hg porosimetry, changing only slightly from the first extrusion run indicating a stable poresystem. Hg porosimetry evaluation of thick film samples enabled estimation of true textural parameters of thethick film compared to powder. Impedance response of the thick film sensor was monitored in a humiditychamber in the relative humidity (RH) range 30–90%, at room temperature (25 °C) and frequency range from42 Hz to 1 MHz. At 100 Hz the impedance reduced from 10.41 MΩ for RH 30% to 0.68 MΩ for RH 90%. Analysisof complex impedance using an equivalent circuit showed the dominant influence of grain boundaries. Thesensor response and recovery was fast (several seconds) and a relatively low hysteresis value of 2.8% wasobtained.
PB  - Elsevier
T2  - Materials Science and Engineering B: Solid-State Materials for Advanced Technology
T1  - Structural, morphological and textural properties of iron manganite (FeMnO3) thick films applied for humidity sensing
SP  - 114547
VL  - 257
DO  - 10.1016/j.mseb.2020.114547
UR  - https://hdl.handle.net/21.15107/rcub_dais_8950
ER  - 

@article{
author = "Nikolić, Maria Vesna and Krstić, Jugoslav and Labus, Nebojša and Luković, Miloljub and Dojčinović, Milena and Radovanović, Milan and Tadić, Nenad B.",
year = "2020",
abstract = "Iron manganite (FeMnO3) powder with a cubic (bixbyite,−Ia3) crystal structure was obtained by a solid statereaction. Thick film paste (powder+organic vehicles) was screen printed on alumina substrate with test interdigitatedPdAg electrodes. Significant porosity (60.6%) composed of macropores (larger than 100 nm) wasdetermined by Hg porosimetry, changing only slightly from the first extrusion run indicating a stable poresystem. Hg porosimetry evaluation of thick film samples enabled estimation of true textural parameters of thethick film compared to powder. Impedance response of the thick film sensor was monitored in a humiditychamber in the relative humidity (RH) range 30–90%, at room temperature (25 °C) and frequency range from42 Hz to 1 MHz. At 100 Hz the impedance reduced from 10.41 MΩ for RH 30% to 0.68 MΩ for RH 90%. Analysisof complex impedance using an equivalent circuit showed the dominant influence of grain boundaries. Thesensor response and recovery was fast (several seconds) and a relatively low hysteresis value of 2.8% wasobtained.",
publisher = "Elsevier",
journal = "Materials Science and Engineering B: Solid-State Materials for Advanced Technology",
title = "Structural, morphological and textural properties of iron manganite (FeMnO3) thick films applied for humidity sensing",
pages = "114547",
volume = "257",
doi = "10.1016/j.mseb.2020.114547",
url = "https://hdl.handle.net/21.15107/rcub_dais_8950"
}

Nikolić, M. V., Krstić, J., Labus, N., Luković, M., Dojčinović, M., Radovanović, M.,& Tadić, N. B.. (2020). Structural, morphological and textural properties of iron manganite (FeMnO3) thick films applied for humidity sensing. in Materials Science and Engineering B: Solid-State Materials for Advanced Technology
Elsevier., 257, 114547.
https://doi.org/10.1016/j.mseb.2020.114547
https://hdl.handle.net/21.15107/rcub_dais_8950

Nikolić MV, Krstić J, Labus N, Luković M, Dojčinović M, Radovanović M, Tadić NB. Structural, morphological and textural properties of iron manganite (FeMnO3) thick films applied for humidity sensing. in Materials Science and Engineering B: Solid-State Materials for Advanced Technology. 2020;257:114547.
doi:10.1016/j.mseb.2020.114547
https://hdl.handle.net/21.15107/rcub_dais_8950 .

Nikolić, Maria Vesna, Krstić, Jugoslav, Labus, Nebojša, Luković, Miloljub, Dojčinović, Milena, Radovanović, Milan, Tadić, Nenad B., "Structural, morphological and textural properties of iron manganite (FeMnO3) thick films applied for humidity sensing" in Materials Science and Engineering B: Solid-State Materials for Advanced Technology, 257 (2020):114547,
https://doi.org/10.1016/j.mseb.2020.114547 .,
https://hdl.handle.net/21.15107/rcub_dais_8950 .

TY  - JOUR
AU  - Nikolić, Maria Vesna
AU  - Krstić, Jugoslav
AU  - Labus, Nebojša
AU  - Luković, Miloljub
AU  - Dojčinović, Milena
AU  - Radovanović, Milan
AU  - Tadić, Nenad B.
PY  - 2020
UR  - https://dais.sanu.ac.rs/123456789/10036
AB  - Iron manganite (FeMnO3) powder with a cubic (bixbyite,−Ia3) crystal structure was obtained by a solid statereaction. Thick film paste (powder+organic vehicles) was screen printed on alumina substrate with test interdigitatedPdAg electrodes. Significant porosity (60.6%) composed of macropores (larger than 100 nm) wasdetermined by Hg porosimetry, changing only slightly from the first extrusion run indicating a stable poresystem. Hg porosimetry evaluation of thick film samples enabled estimation of true textural parameters of thethick film compared to powder. Impedance response of the thick film sensor was monitored in a humiditychamber in the relative humidity (RH) range 30–90%, at room temperature (25 °C) and frequency range from42 Hz to 1 MHz. At 100 Hz the impedance reduced from 10.41 MΩ for RH 30% to 0.68 MΩ for RH 90%. Analysisof complex impedance using an equivalent circuit showed the dominant influence of grain boundaries. Thesensor response and recovery was fast (several seconds) and a relatively low hysteresis value of 2.8% wasobtained.
PB  - Elsevier
T2  - Materials Science and Engineering B: Solid-State Materials for Advanced Technology
T1  - Structural, morphological and textural properties of iron manganite (FeMnO3) thick films applied for humidity sensing
SP  - 114547
VL  - 257
DO  - 10.1016/j.mseb.2020.114547
UR  - https://hdl.handle.net/21.15107/rcub_dais_10036
ER  - 

@article{
author = "Nikolić, Maria Vesna and Krstić, Jugoslav and Labus, Nebojša and Luković, Miloljub and Dojčinović, Milena and Radovanović, Milan and Tadić, Nenad B.",
year = "2020",
abstract = "Iron manganite (FeMnO3) powder with a cubic (bixbyite,−Ia3) crystal structure was obtained by a solid statereaction. Thick film paste (powder+organic vehicles) was screen printed on alumina substrate with test interdigitatedPdAg electrodes. Significant porosity (60.6%) composed of macropores (larger than 100 nm) wasdetermined by Hg porosimetry, changing only slightly from the first extrusion run indicating a stable poresystem. Hg porosimetry evaluation of thick film samples enabled estimation of true textural parameters of thethick film compared to powder. Impedance response of the thick film sensor was monitored in a humiditychamber in the relative humidity (RH) range 30–90%, at room temperature (25 °C) and frequency range from42 Hz to 1 MHz. At 100 Hz the impedance reduced from 10.41 MΩ for RH 30% to 0.68 MΩ for RH 90%. Analysisof complex impedance using an equivalent circuit showed the dominant influence of grain boundaries. Thesensor response and recovery was fast (several seconds) and a relatively low hysteresis value of 2.8% wasobtained.",
publisher = "Elsevier",
journal = "Materials Science and Engineering B: Solid-State Materials for Advanced Technology",
title = "Structural, morphological and textural properties of iron manganite (FeMnO3) thick films applied for humidity sensing",
pages = "114547",
volume = "257",
doi = "10.1016/j.mseb.2020.114547",
url = "https://hdl.handle.net/21.15107/rcub_dais_10036"
}

Nikolić, M. V., Krstić, J., Labus, N., Luković, M., Dojčinović, M., Radovanović, M.,& Tadić, N. B.. (2020). Structural, morphological and textural properties of iron manganite (FeMnO3) thick films applied for humidity sensing. in Materials Science and Engineering B: Solid-State Materials for Advanced Technology
Elsevier., 257, 114547.
https://doi.org/10.1016/j.mseb.2020.114547
https://hdl.handle.net/21.15107/rcub_dais_10036

Nikolić MV, Krstić J, Labus N, Luković M, Dojčinović M, Radovanović M, Tadić NB. Structural, morphological and textural properties of iron manganite (FeMnO3) thick films applied for humidity sensing. in Materials Science and Engineering B: Solid-State Materials for Advanced Technology. 2020;257:114547.
doi:10.1016/j.mseb.2020.114547
https://hdl.handle.net/21.15107/rcub_dais_10036 .

Nikolić, Maria Vesna, Krstić, Jugoslav, Labus, Nebojša, Luković, Miloljub, Dojčinović, Milena, Radovanović, Milan, Tadić, Nenad B., "Structural, morphological and textural properties of iron manganite (FeMnO3) thick films applied for humidity sensing" in Materials Science and Engineering B: Solid-State Materials for Advanced Technology, 257 (2020):114547,
https://doi.org/10.1016/j.mseb.2020.114547 .,
https://hdl.handle.net/21.15107/rcub_dais_10036 .

TY  - JOUR
AU  - Miladinović, Marija R.
AU  - Zdujić, Miodrag
AU  - Veljović, Đorđe
AU  - Krstić, Jugoslav B.
AU  - Banković Ilić, Ivana B.
AU  - Veljković, Vlada B.
AU  - Stamenković, Olivera S.
PY  - 2020
UR  - https://dais.sanu.ac.rs/123456789/6903
AB  - The catalytic activity of the walnut shell ash was investigated in the biodiesel production by the sunflower oil methanolysis. The catalyst was characterized by the TG-DTA, XRD, Hg porosimetry, N2 physisorption, SEM, and Hammett method. In addition, the effects of the catalyst loading and the methanol-to-oil molar ratio on the methyl esters synthesis were tested at the reaction temperature of 60 °C. The walnut shell ash provided a very fast reaction and a high FAME content (over 98%). As the reaction occurred in the absence of triacylglycerols mass transfer limitation, the pseudo-first-order model was employed for describing the kinetics of the reaction. The catalyst was successfully reused four times after the regeneration of the catalytic activity by recalcination at 800 °C.
PB  - Elsevier
T2  - Renewable Energy
T1  - Valorization of walnut shell ash as a catalyst for biodiesel production
SP  - 1033
EP  - 1043
VL  - 147
DO  - 10.1016/j.renene.2019.09.056
UR  - https://hdl.handle.net/21.15107/rcub_dais_6903
ER  - 

@article{
author = "Miladinović, Marija R. and Zdujić, Miodrag and Veljović, Đorđe and Krstić, Jugoslav B. and Banković Ilić, Ivana B. and Veljković, Vlada B. and Stamenković, Olivera S.",
year = "2020",
abstract = "The catalytic activity of the walnut shell ash was investigated in the biodiesel production by the sunflower oil methanolysis. The catalyst was characterized by the TG-DTA, XRD, Hg porosimetry, N2 physisorption, SEM, and Hammett method. In addition, the effects of the catalyst loading and the methanol-to-oil molar ratio on the methyl esters synthesis were tested at the reaction temperature of 60 °C. The walnut shell ash provided a very fast reaction and a high FAME content (over 98%). As the reaction occurred in the absence of triacylglycerols mass transfer limitation, the pseudo-first-order model was employed for describing the kinetics of the reaction. The catalyst was successfully reused four times after the regeneration of the catalytic activity by recalcination at 800 °C.",
publisher = "Elsevier",
journal = "Renewable Energy",
title = "Valorization of walnut shell ash as a catalyst for biodiesel production",
pages = "1033-1043",
volume = "147",
doi = "10.1016/j.renene.2019.09.056",
url = "https://hdl.handle.net/21.15107/rcub_dais_6903"
}

Miladinović, M. R., Zdujić, M., Veljović, Đ., Krstić, J. B., Banković Ilić, I. B., Veljković, V. B.,& Stamenković, O. S.. (2020). Valorization of walnut shell ash as a catalyst for biodiesel production. in Renewable Energy
Elsevier., 147, 1033-1043.
https://doi.org/10.1016/j.renene.2019.09.056
https://hdl.handle.net/21.15107/rcub_dais_6903

Miladinović MR, Zdujić M, Veljović Đ, Krstić JB, Banković Ilić IB, Veljković VB, Stamenković OS. Valorization of walnut shell ash as a catalyst for biodiesel production. in Renewable Energy. 2020;147:1033-1043.
doi:10.1016/j.renene.2019.09.056
https://hdl.handle.net/21.15107/rcub_dais_6903 .

Miladinović, Marija R., Zdujić, Miodrag, Veljović, Đorđe, Krstić, Jugoslav B., Banković Ilić, Ivana B., Veljković, Vlada B., Stamenković, Olivera S., "Valorization of walnut shell ash as a catalyst for biodiesel production" in Renewable Energy, 147 (2020):1033-1043,
https://doi.org/10.1016/j.renene.2019.09.056 .,
https://hdl.handle.net/21.15107/rcub_dais_6903 .

TY  - JOUR
AU  - Miladinović, Marija R.
AU  - Zdujić, Miodrag
AU  - Veljović, Đorđe
AU  - Krstić, Jugoslav B.
AU  - Banković Ilić, Ivana B.
AU  - Veljković, Vlada B.
AU  - Stamenković, Olivera S.
PY  - 2020
UR  - http://cer.ihtm.bg.ac.rs/handle/123456789/3217
UR  - https://dais.sanu.ac.rs/123456789/6717
AB  - The catalytic activity of the walnut shell ash was investigated in the biodiesel production by the sunflower oil methanolysis. The catalyst was characterized by the TG-DTA, XRD, Hg porosimetry, N2 physisorption, SEM, and Hammett method. In addition, the effects of the catalyst loading and the methanol-to-oil molar ratio on the methyl esters synthesis were tested at the reaction temperature of 60 °C. The walnut shell ash provided a very fast reaction and a high FAME content (over 98%). As the reaction occurred in the absence of triacylglycerols mass transfer limitation, the pseudo-first-order model was employed for describing the kinetics of the reaction. The catalyst was successfully reused four times after the regeneration of the catalytic activity by recalcination at 800 °C.
PB  - Elsevier
T2  - Renewable Energy
T1  - Valorization of walnut shell ash as a catalyst for biodiesel production
SP  - 1033
EP  - 1043
VL  - 147
DO  - 10.1016/j.renene.2019.09.056
UR  - https://hdl.handle.net/21.15107/rcub_dais_6717
ER  - 

@article{
author = "Miladinović, Marija R. and Zdujić, Miodrag and Veljović, Đorđe and Krstić, Jugoslav B. and Banković Ilić, Ivana B. and Veljković, Vlada B. and Stamenković, Olivera S.",
year = "2020",
abstract = "The catalytic activity of the walnut shell ash was investigated in the biodiesel production by the sunflower oil methanolysis. The catalyst was characterized by the TG-DTA, XRD, Hg porosimetry, N2 physisorption, SEM, and Hammett method. In addition, the effects of the catalyst loading and the methanol-to-oil molar ratio on the methyl esters synthesis were tested at the reaction temperature of 60 °C. The walnut shell ash provided a very fast reaction and a high FAME content (over 98%). As the reaction occurred in the absence of triacylglycerols mass transfer limitation, the pseudo-first-order model was employed for describing the kinetics of the reaction. The catalyst was successfully reused four times after the regeneration of the catalytic activity by recalcination at 800 °C.",
publisher = "Elsevier",
journal = "Renewable Energy",
title = "Valorization of walnut shell ash as a catalyst for biodiesel production",
pages = "1033-1043",
volume = "147",
doi = "10.1016/j.renene.2019.09.056",
url = "https://hdl.handle.net/21.15107/rcub_dais_6717"
}

Miladinović, M. R., Zdujić, M., Veljović, Đ., Krstić, J. B., Banković Ilić, I. B., Veljković, V. B.,& Stamenković, O. S.. (2020). Valorization of walnut shell ash as a catalyst for biodiesel production. in Renewable Energy
Elsevier., 147, 1033-1043.
https://doi.org/10.1016/j.renene.2019.09.056
https://hdl.handle.net/21.15107/rcub_dais_6717

Miladinović MR, Zdujić M, Veljović Đ, Krstić JB, Banković Ilić IB, Veljković VB, Stamenković OS. Valorization of walnut shell ash as a catalyst for biodiesel production. in Renewable Energy. 2020;147:1033-1043.
doi:10.1016/j.renene.2019.09.056
https://hdl.handle.net/21.15107/rcub_dais_6717 .

Miladinović, Marija R., Zdujić, Miodrag, Veljović, Đorđe, Krstić, Jugoslav B., Banković Ilić, Ivana B., Veljković, Vlada B., Stamenković, Olivera S., "Valorization of walnut shell ash as a catalyst for biodiesel production" in Renewable Energy, 147 (2020):1033-1043,
https://doi.org/10.1016/j.renene.2019.09.056 .,
https://hdl.handle.net/21.15107/rcub_dais_6717 .

TY  - JOUR
AU  - Dodevski, Vladimir
AU  - Pagnacco, Maja C.
AU  - Radović, Ivana
AU  - Rosić, Milena
AU  - Janković, Bojan
AU  - Stojmenović, Marija
AU  - Mitić, Vojislav V.
PY  - 2020
UR  - https://dais.sanu.ac.rs/123456789/8726
AB  - The aim of this research was to obtain a carbon solid residue by the carbonization process of biomass in an inert atmosphere which, through physical activation and chemical treatment (using TEOS - tetraethyl orthosilicate) would allow creation of highly porous and spatially distinct ordered bio-SiC ceramics. The results of carbonization experiments at several operating temperatures and activation of carbons with multiple-cycle treatments TEOS clearly showed the possibility of obtaining SiC nano-structures, after performing the carbothermal reduction at 1400 °C. The increase in the activation temperature and the duration time starts the development of the SiC particles inside the porous structure. The XRPD analysis showed that the major SiC polytype has cubic SiC (β-SiC) structure and remainder is hexagonal SiC polytypic (α-SiC) structure. It was established that the carbons obtained from carbonization of the Platanus orientalis L. plane tree fruit (PTF) precursor and activated at 850 °C with longer holding times (1 and 2 h) exhibit β-SiC (cubic) nano-wires. A possible nano-wires increment mechanism was suggested. The obtained results represent significant contribution in understanding the process as well as the main characteristics of SiC nano-materials and their possible applications.
PB  - Elsevier
T2  - Materials Chemistry and Physics
T1  - Characterization of silicon carbide ceramics obtained from porous carbon structure achieved by plant carbonization
SP  - 122768
VL  - 245
DO  - 10.1016/j.matchemphys.2020.122768
UR  - https://hdl.handle.net/21.15107/rcub_dais_8726
ER  - 

@article{
author = "Dodevski, Vladimir and Pagnacco, Maja C. and Radović, Ivana and Rosić, Milena and Janković, Bojan and Stojmenović, Marija and Mitić, Vojislav V.",
year = "2020",
abstract = "The aim of this research was to obtain a carbon solid residue by the carbonization process of biomass in an inert atmosphere which, through physical activation and chemical treatment (using TEOS - tetraethyl orthosilicate) would allow creation of highly porous and spatially distinct ordered bio-SiC ceramics. The results of carbonization experiments at several operating temperatures and activation of carbons with multiple-cycle treatments TEOS clearly showed the possibility of obtaining SiC nano-structures, after performing the carbothermal reduction at 1400 °C. The increase in the activation temperature and the duration time starts the development of the SiC particles inside the porous structure. The XRPD analysis showed that the major SiC polytype has cubic SiC (β-SiC) structure and remainder is hexagonal SiC polytypic (α-SiC) structure. It was established that the carbons obtained from carbonization of the Platanus orientalis L. plane tree fruit (PTF) precursor and activated at 850 °C with longer holding times (1 and 2 h) exhibit β-SiC (cubic) nano-wires. A possible nano-wires increment mechanism was suggested. The obtained results represent significant contribution in understanding the process as well as the main characteristics of SiC nano-materials and their possible applications.",
publisher = "Elsevier",
journal = "Materials Chemistry and Physics",
title = "Characterization of silicon carbide ceramics obtained from porous carbon structure achieved by plant carbonization",
pages = "122768",
volume = "245",
doi = "10.1016/j.matchemphys.2020.122768",
url = "https://hdl.handle.net/21.15107/rcub_dais_8726"
}

Dodevski, V., Pagnacco, M. C., Radović, I., Rosić, M., Janković, B., Stojmenović, M.,& Mitić, V. V.. (2020). Characterization of silicon carbide ceramics obtained from porous carbon structure achieved by plant carbonization. in Materials Chemistry and Physics
Elsevier., 245, 122768.
https://doi.org/10.1016/j.matchemphys.2020.122768
https://hdl.handle.net/21.15107/rcub_dais_8726

Dodevski V, Pagnacco MC, Radović I, Rosić M, Janković B, Stojmenović M, Mitić VV. Characterization of silicon carbide ceramics obtained from porous carbon structure achieved by plant carbonization. in Materials Chemistry and Physics. 2020;245:122768.
doi:10.1016/j.matchemphys.2020.122768
https://hdl.handle.net/21.15107/rcub_dais_8726 .

Dodevski, Vladimir, Pagnacco, Maja C., Radović, Ivana, Rosić, Milena, Janković, Bojan, Stojmenović, Marija, Mitić, Vojislav V., "Characterization of silicon carbide ceramics obtained from porous carbon structure achieved by plant carbonization" in Materials Chemistry and Physics, 245 (2020):122768,
https://doi.org/10.1016/j.matchemphys.2020.122768 .,
https://hdl.handle.net/21.15107/rcub_dais_8726 .

TY  - DATA
AU  - Todorović, Zoran B.
AU  - Troter, Dragan Z.
AU  - Đokić-Stojanović, Dušica R.
AU  - Veličković, Ana V.
AU  - Avramović, Jelena M.
AU  - Stamenković, Olivera S.
AU  - Veselinović, Ljiljana
AU  - Veljković, Vlada B.
PY  - 2019
UR  - https://dais.sanu.ac.rs/123456789/4071
AB  - Figure S1. Variation of FAME content during the sunflower oil methanolysis with CaO as a 
catalyst and crude biodiesel as a cosolvent; Figure S2. XRD patterns of the calcined CaO used as a catalyst in combination with different 
amounts of crude biodiesel as a cosolvent. XRD pattern of the calcined CaO not used in the 
reaction was also provided for comparison.
T2  - Fuel
T1  - Supplementary data for the article: Todorović, Zoran B., Dragan Z. Troter, Dušica R. Đokić-Stojanović, Ana V. Veličković, Jelena M. Avramović, Olivera S. Stamenković, Ljiljana M. Veselinović, and Vlada B. Veljković. 2019. “Optimization of CaO-Catalyzed Sunflower Oil Methanolysis with Crude Biodiesel as a Cosolvent.” Fuel 237 (February): 903–10. https://doi.org/10.1016/j.fuel.2018.10.056
UR  - https://hdl.handle.net/21.15107/rcub_dais_4071
ER  - 

@misc{
author = "Todorović, Zoran B. and Troter, Dragan Z. and Đokić-Stojanović, Dušica R. and Veličković, Ana V. and Avramović, Jelena M. and Stamenković, Olivera S. and Veselinović, Ljiljana and Veljković, Vlada B.",
year = "2019",
abstract = "Figure S1. Variation of FAME content during the sunflower oil methanolysis with CaO as a 
catalyst and crude biodiesel as a cosolvent; Figure S2. XRD patterns of the calcined CaO used as a catalyst in combination with different 
amounts of crude biodiesel as a cosolvent. XRD pattern of the calcined CaO not used in the 
reaction was also provided for comparison.",
journal = "Fuel",
title = "Supplementary data for the article: Todorović, Zoran B., Dragan Z. Troter, Dušica R. Đokić-Stojanović, Ana V. Veličković, Jelena M. Avramović, Olivera S. Stamenković, Ljiljana M. Veselinović, and Vlada B. Veljković. 2019. “Optimization of CaO-Catalyzed Sunflower Oil Methanolysis with Crude Biodiesel as a Cosolvent.” Fuel 237 (February): 903–10. https://doi.org/10.1016/j.fuel.2018.10.056",
url = "https://hdl.handle.net/21.15107/rcub_dais_4071"
}

Todorović, Z. B., Troter, D. Z., Đokić-Stojanović, D. R., Veličković, A. V., Avramović, J. M., Stamenković, O. S., Veselinović, L.,& Veljković, V. B.. (2019). Supplementary data for the article: Todorović, Zoran B., Dragan Z. Troter, Dušica R. Đokić-Stojanović, Ana V. Veličković, Jelena M. Avramović, Olivera S. Stamenković, Ljiljana M. Veselinović, and Vlada B. Veljković. 2019. “Optimization of CaO-Catalyzed Sunflower Oil Methanolysis with Crude Biodiesel as a Cosolvent.” Fuel 237 (February): 903–10. https://doi.org/10.1016/j.fuel.2018.10.056. in Fuel.
https://hdl.handle.net/21.15107/rcub_dais_4071

Todorović ZB, Troter DZ, Đokić-Stojanović DR, Veličković AV, Avramović JM, Stamenković OS, Veselinović L, Veljković VB. Supplementary data for the article: Todorović, Zoran B., Dragan Z. Troter, Dušica R. Đokić-Stojanović, Ana V. Veličković, Jelena M. Avramović, Olivera S. Stamenković, Ljiljana M. Veselinović, and Vlada B. Veljković. 2019. “Optimization of CaO-Catalyzed Sunflower Oil Methanolysis with Crude Biodiesel as a Cosolvent.” Fuel 237 (February): 903–10. https://doi.org/10.1016/j.fuel.2018.10.056. in Fuel. 2019;.
https://hdl.handle.net/21.15107/rcub_dais_4071 .

Todorović, Zoran B., Troter, Dragan Z., Đokić-Stojanović, Dušica R., Veličković, Ana V., Avramović, Jelena M., Stamenković, Olivera S., Veselinović, Ljiljana, Veljković, Vlada B., "Supplementary data for the article: Todorović, Zoran B., Dragan Z. Troter, Dušica R. Đokić-Stojanović, Ana V. Veličković, Jelena M. Avramović, Olivera S. Stamenković, Ljiljana M. Veselinović, and Vlada B. Veljković. 2019. “Optimization of CaO-Catalyzed Sunflower Oil Methanolysis with Crude Biodiesel as a Cosolvent.” Fuel 237 (February): 903–10. https://doi.org/10.1016/j.fuel.2018.10.056" in Fuel (2019),
https://hdl.handle.net/21.15107/rcub_dais_4071 .

TY  - JOUR
AU  - Todorović, Zoran B.
AU  - Troter, Dragan Z.
AU  - Đokić-Stojanović, Dušica R.
AU  - Veličković, Ana V.
AU  - Avramović, Jelena M.
AU  - Stamenković, Olivera S.
AU  - Veselinović, Ljiljana
AU  - Veljković, Vlada B.
PY  - 2019
UR  - http://www.sciencedirect.com/science/article/pii/S0016236118317691
UR  - https://dais.sanu.ac.rs/123456789/4070
AB  - Crude biodiesel was proven as a cosolvent in the methanolysis of sunflower oil catalyzed by calcined CaO. This reaction was modeled and optimized statistically in terms of reaction temperature (33.2–66.8 °C), methanol-to-oil molar ratio (3.5:1–8.5:1) and catalyst concentration (0.219–1.065 mol/L). The cosolvent loading was 10 wt% (based on oil weight). The optimum reaction conditions were found to be: the methanol-to-oil molar ratio of 7.1:1, the catalyst concentration of 0.74 mol/L and the reaction temperature 52 °C, ensuring the best esters content of 99.8%, for the reaction time of 1.5 h, which is close to the reported experimental value of 98.9%. Also, the used catalyst was recycled with no additional treatment in the further four consecutive cycles under the following reaction conditions: methanol-to-oil molar ratio 6:1, the concentration of catalyst 0.642 mol/L (only in the first run), the reaction temperature 50 °C, cosolvent-crude biodiesel loading 10 wt% to oil weight. The second recycling reaction provided the highest FAME content of 97.7% after 5 h.
PB  - Elsevier
T2  - Fuel
T1  - Optimization of CaO-catalyzed sunflower oil methanolysis with crude biodiesel as a cosolvent
SP  - 903
EP  - 910
VL  - 237
DO  - 10.1016/j.fuel.2018.10.056
UR  - https://hdl.handle.net/21.15107/rcub_dais_4070
ER  - 

@article{
author = "Todorović, Zoran B. and Troter, Dragan Z. and Đokić-Stojanović, Dušica R. and Veličković, Ana V. and Avramović, Jelena M. and Stamenković, Olivera S. and Veselinović, Ljiljana and Veljković, Vlada B.",
year = "2019",
abstract = "Crude biodiesel was proven as a cosolvent in the methanolysis of sunflower oil catalyzed by calcined CaO. This reaction was modeled and optimized statistically in terms of reaction temperature (33.2–66.8 °C), methanol-to-oil molar ratio (3.5:1–8.5:1) and catalyst concentration (0.219–1.065 mol/L). The cosolvent loading was 10 wt% (based on oil weight). The optimum reaction conditions were found to be: the methanol-to-oil molar ratio of 7.1:1, the catalyst concentration of 0.74 mol/L and the reaction temperature 52 °C, ensuring the best esters content of 99.8%, for the reaction time of 1.5 h, which is close to the reported experimental value of 98.9%. Also, the used catalyst was recycled with no additional treatment in the further four consecutive cycles under the following reaction conditions: methanol-to-oil molar ratio 6:1, the concentration of catalyst 0.642 mol/L (only in the first run), the reaction temperature 50 °C, cosolvent-crude biodiesel loading 10 wt% to oil weight. The second recycling reaction provided the highest FAME content of 97.7% after 5 h.",
publisher = "Elsevier",
journal = "Fuel",
title = "Optimization of CaO-catalyzed sunflower oil methanolysis with crude biodiesel as a cosolvent",
pages = "903-910",
volume = "237",
doi = "10.1016/j.fuel.2018.10.056",
url = "https://hdl.handle.net/21.15107/rcub_dais_4070"
}

Todorović, Z. B., Troter, D. Z., Đokić-Stojanović, D. R., Veličković, A. V., Avramović, J. M., Stamenković, O. S., Veselinović, L.,& Veljković, V. B.. (2019). Optimization of CaO-catalyzed sunflower oil methanolysis with crude biodiesel as a cosolvent. in Fuel
Elsevier., 237, 903-910.
https://doi.org/10.1016/j.fuel.2018.10.056
https://hdl.handle.net/21.15107/rcub_dais_4070

Todorović ZB, Troter DZ, Đokić-Stojanović DR, Veličković AV, Avramović JM, Stamenković OS, Veselinović L, Veljković VB. Optimization of CaO-catalyzed sunflower oil methanolysis with crude biodiesel as a cosolvent. in Fuel. 2019;237:903-910.
doi:10.1016/j.fuel.2018.10.056
https://hdl.handle.net/21.15107/rcub_dais_4070 .

Todorović, Zoran B., Troter, Dragan Z., Đokić-Stojanović, Dušica R., Veličković, Ana V., Avramović, Jelena M., Stamenković, Olivera S., Veselinović, Ljiljana, Veljković, Vlada B., "Optimization of CaO-catalyzed sunflower oil methanolysis with crude biodiesel as a cosolvent" in Fuel, 237 (2019):903-910,
https://doi.org/10.1016/j.fuel.2018.10.056 .,
https://hdl.handle.net/21.15107/rcub_dais_4070 .

TY  - JOUR
AU  - Todorović, Zoran B.
AU  - Troter, Dragan Z.
AU  - Đokić Stojanović, Dušica R.
AU  - Veličković, Ana V.
AU  - Avramović, Jelena M.
AU  - Stamenković, Olivera S.
AU  - Veselinović, Ljiljana
AU  - Veljković, Vlada B.
PY  - 2019
UR  - http://www.sciencedirect.com/science/article/pii/S0016236118317691
UR  - https://dais.sanu.ac.rs/123456789/4069
AB  - Crude biodiesel was proven as a cosolvent in the methanolysis of sunflower oil catalyzed by calcined CaO. This reaction was modeled and optimized statistically in terms of reaction temperature (33.2–66.8 °C), methanol-to-oil molar ratio (3.5:1–8.5:1) and catalyst concentration (0.219–1.065 mol/L). The cosolvent loading was 10 wt% (based on oil weight). The optimum reaction conditions were found to be: the methanol-to-oil molar ratio of 7.1:1, the catalyst concentration of 0.74 mol/L and the reaction temperature 52 °C, ensuring the best esters content of 99.8%, for the reaction time of 1.5 h, which is close to the reported experimental value of 98.9%. Also, the used catalyst was recycled with no additional treatment in the further four consecutive cycles under the following reaction conditions: methanol-to-oil molar ratio 6:1, the concentration of catalyst 0.642 mol/L (only in the first run), the reaction temperature 50 °C, cosolvent-crude biodiesel loading 10 wt% to oil weight. The second recycling reaction provided the highest FAME content of 97.7% after 5 h.
PB  - Elsevier
T2  - Fuel
T1  - Optimization of CaO-catalyzed sunflower oil methanolysis with crude biodiesel as a cosolvent
SP  - 903
EP  - 910
VL  - 237
DO  - 10.1016/j.fuel.2018.10.056
UR  - https://hdl.handle.net/21.15107/rcub_dais_4069
ER  - 

@article{
author = "Todorović, Zoran B. and Troter, Dragan Z. and Đokić Stojanović, Dušica R. and Veličković, Ana V. and Avramović, Jelena M. and Stamenković, Olivera S. and Veselinović, Ljiljana and Veljković, Vlada B.",
year = "2019",
abstract = "Crude biodiesel was proven as a cosolvent in the methanolysis of sunflower oil catalyzed by calcined CaO. This reaction was modeled and optimized statistically in terms of reaction temperature (33.2–66.8 °C), methanol-to-oil molar ratio (3.5:1–8.5:1) and catalyst concentration (0.219–1.065 mol/L). The cosolvent loading was 10 wt% (based on oil weight). The optimum reaction conditions were found to be: the methanol-to-oil molar ratio of 7.1:1, the catalyst concentration of 0.74 mol/L and the reaction temperature 52 °C, ensuring the best esters content of 99.8%, for the reaction time of 1.5 h, which is close to the reported experimental value of 98.9%. Also, the used catalyst was recycled with no additional treatment in the further four consecutive cycles under the following reaction conditions: methanol-to-oil molar ratio 6:1, the concentration of catalyst 0.642 mol/L (only in the first run), the reaction temperature 50 °C, cosolvent-crude biodiesel loading 10 wt% to oil weight. The second recycling reaction provided the highest FAME content of 97.7% after 5 h.",
publisher = "Elsevier",
journal = "Fuel",
title = "Optimization of CaO-catalyzed sunflower oil methanolysis with crude biodiesel as a cosolvent",
pages = "903-910",
volume = "237",
doi = "10.1016/j.fuel.2018.10.056",
url = "https://hdl.handle.net/21.15107/rcub_dais_4069"
}

Todorović, Z. B., Troter, D. Z., Đokić Stojanović, D. R., Veličković, A. V., Avramović, J. M., Stamenković, O. S., Veselinović, L.,& Veljković, V. B.. (2019). Optimization of CaO-catalyzed sunflower oil methanolysis with crude biodiesel as a cosolvent. in Fuel
Elsevier., 237, 903-910.
https://doi.org/10.1016/j.fuel.2018.10.056
https://hdl.handle.net/21.15107/rcub_dais_4069

Todorović ZB, Troter DZ, Đokić Stojanović DR, Veličković AV, Avramović JM, Stamenković OS, Veselinović L, Veljković VB. Optimization of CaO-catalyzed sunflower oil methanolysis with crude biodiesel as a cosolvent. in Fuel. 2019;237:903-910.
doi:10.1016/j.fuel.2018.10.056
https://hdl.handle.net/21.15107/rcub_dais_4069 .

Todorović, Zoran B., Troter, Dragan Z., Đokić Stojanović, Dušica R., Veličković, Ana V., Avramović, Jelena M., Stamenković, Olivera S., Veselinović, Ljiljana, Veljković, Vlada B., "Optimization of CaO-catalyzed sunflower oil methanolysis with crude biodiesel as a cosolvent" in Fuel, 237 (2019):903-910,
https://doi.org/10.1016/j.fuel.2018.10.056 .,
https://hdl.handle.net/21.15107/rcub_dais_4069 .

TY  - JOUR
AU  - Đokić Stojanović, Dušica R.
AU  - Todorović, Zoran B.
AU  - Troter, Dragan
AU  - Stamenković, Olivera S.
AU  - Veselinović, Ljiljana
AU  - Zdujić, Miodrag
AU  - Manojlović, Dragan D.
AU  - Veljković, Vlada B.
PY  - 2019
UR  - https://dais.sanu.ac.rs/123456789/6183
AB  - Ten organic solvents (triethanolamine, diethanolamine, ethylene glycol, methyl ethyl ketone, n-hexane, triethylamine, ethylene glycol dimethyl ether, glycerol, tetrahydrofuran and dioxane) were applied as cosolvents in the CaO-catalyzed ethanolysis of sunflower oil performed in a batch stirred reactor under the following reaction conditions: temperature 70 °C, ethanol-to-oil mole ratio 12:1, initial catalyst concentration 1.374 mol·L -1 and amount of cosolvent 20 % based on the oil amount. The main goals were to assess the effect of the used cosolvents on the synthesis of fatty acid ethyl esters (FAEE) and to select the most efficient one with respect to the final FAEE content, reaction duration and safety profile. In the absence of any cosolvent, the reaction was rather slow, providing a FAEE content of only 89.7±1.7 % after 4 h. Of the tested cosolvents, diethanolamine, triethanolamine and ethylene glycol significantly accelerated the ethanolysis reaction, whereby the last two provided a final FAEE content of 93.1±2.1 and 94.1±1.5 %, respectively, within 0.5 h. However, because of its safety profile, triethanolamine was selected as the best cosolvent for the ethanolysis of sunflower oil catalyzed by calcined CaO.
PB  - Belgrade : Serbian Chemical Society
T2  - Journal of the Serbian Chemical Society
T1  - Influence of various cosolvents on the calcium oxide-catalyzed ethanolysis of sunflower oil
SP  - 253
EP  - 265
VL  - 84
IS  - 3
DO  - 10.2298/JSC180827007D
UR  - https://hdl.handle.net/21.15107/rcub_dais_6183
ER  - 

@article{
author = "Đokić Stojanović, Dušica R. and Todorović, Zoran B. and Troter, Dragan and Stamenković, Olivera S. and Veselinović, Ljiljana and Zdujić, Miodrag and Manojlović, Dragan D. and Veljković, Vlada B.",
year = "2019",
abstract = "Ten organic solvents (triethanolamine, diethanolamine, ethylene glycol, methyl ethyl ketone, n-hexane, triethylamine, ethylene glycol dimethyl ether, glycerol, tetrahydrofuran and dioxane) were applied as cosolvents in the CaO-catalyzed ethanolysis of sunflower oil performed in a batch stirred reactor under the following reaction conditions: temperature 70 °C, ethanol-to-oil mole ratio 12:1, initial catalyst concentration 1.374 mol·L -1 and amount of cosolvent 20 % based on the oil amount. The main goals were to assess the effect of the used cosolvents on the synthesis of fatty acid ethyl esters (FAEE) and to select the most efficient one with respect to the final FAEE content, reaction duration and safety profile. In the absence of any cosolvent, the reaction was rather slow, providing a FAEE content of only 89.7±1.7 % after 4 h. Of the tested cosolvents, diethanolamine, triethanolamine and ethylene glycol significantly accelerated the ethanolysis reaction, whereby the last two provided a final FAEE content of 93.1±2.1 and 94.1±1.5 %, respectively, within 0.5 h. However, because of its safety profile, triethanolamine was selected as the best cosolvent for the ethanolysis of sunflower oil catalyzed by calcined CaO.",
publisher = "Belgrade : Serbian Chemical Society",
journal = "Journal of the Serbian Chemical Society",
title = "Influence of various cosolvents on the calcium oxide-catalyzed ethanolysis of sunflower oil",
pages = "253-265",
volume = "84",
number = "3",
doi = "10.2298/JSC180827007D",
url = "https://hdl.handle.net/21.15107/rcub_dais_6183"
}

Đokić Stojanović, D. R., Todorović, Z. B., Troter, D., Stamenković, O. S., Veselinović, L., Zdujić, M., Manojlović, D. D.,& Veljković, V. B.. (2019). Influence of various cosolvents on the calcium oxide-catalyzed ethanolysis of sunflower oil. in Journal of the Serbian Chemical Society
Belgrade : Serbian Chemical Society., 84(3), 253-265.
https://doi.org/10.2298/JSC180827007D
https://hdl.handle.net/21.15107/rcub_dais_6183

Đokić Stojanović DR, Todorović ZB, Troter D, Stamenković OS, Veselinović L, Zdujić M, Manojlović DD, Veljković VB. Influence of various cosolvents on the calcium oxide-catalyzed ethanolysis of sunflower oil. in Journal of the Serbian Chemical Society. 2019;84(3):253-265.
doi:10.2298/JSC180827007D
https://hdl.handle.net/21.15107/rcub_dais_6183 .

Đokić Stojanović, Dušica R., Todorović, Zoran B., Troter, Dragan, Stamenković, Olivera S., Veselinović, Ljiljana, Zdujić, Miodrag, Manojlović, Dragan D., Veljković, Vlada B., "Influence of various cosolvents on the calcium oxide-catalyzed ethanolysis of sunflower oil" in Journal of the Serbian Chemical Society, 84, no. 3 (2019):253-265,
https://doi.org/10.2298/JSC180827007D .,
https://hdl.handle.net/21.15107/rcub_dais_6183 .

TY  - JOUR
AU  - Đokić-Stojanović, Dušica R.
AU  - Todorović, Zoran B.
AU  - Troter, Dragan Z.
AU  - Stamenković, Olivera S.
AU  - Veselinović, Ljiljana
AU  - Zdujić, Miodrag
AU  - Manojlović, Dragan D.
AU  - Veljković, Vlada B.
PY  - 2019
UR  - https://dais.sanu.ac.rs/123456789/7041
AB  - Triethanolamine was applied as an efficient „green“ cosolvent for biodiesel production by CaO-catalyzed ethanolysis of sunflower oil. The reaction was conducted in a batch stirred reactor and optimized with respect to the reaction temperature (61.6-78.4 °C), the ethanol-to-oil molar ratio (7:1-17:1) and the cosolvent loading (3-36 % of the oil weight) by using a rotatable central composite design (RCCD) combined with the response surface methodology (RSM). The optimal reaction conditions were found to be: the ethanol-to-oil molar ratio of 9:1, the reaction temperature of 75 °C and the cosolvent loading of 30 % to oil weight, which resulted in the predicted and actual fatty acid ethyl ester (FAEE) contents of 98.8 % and 97.9±1.3 %, respectively, achieved within only 20 min of the reaction. Also, high FAEE contents were obtained with expired sunflower oil, hempseed oil and waste lard. X-ray diffraction analysis (XRD) was used to understand the changes in the CaO phase. The CaO catalyst can be used without any treatment in two consecutive cycles. Due to the calcium leaching into the product, an additional purification stage must be included in the overall process.
T2  - Hemijska industrija
T1  - Triethanolamine as an efficient cosolvent for biodiesel production by CaO-catalyzed sunflower oil ethanolysis: An optimization study
SP  - 351
EP  - 362
VL  - 73
IS  - 6
DO  - 10.2298/HEMIND190822033D
UR  - https://hdl.handle.net/21.15107/rcub_dais_7041
ER  - 

@article{
author = "Đokić-Stojanović, Dušica R. and Todorović, Zoran B. and Troter, Dragan Z. and Stamenković, Olivera S. and Veselinović, Ljiljana and Zdujić, Miodrag and Manojlović, Dragan D. and Veljković, Vlada B.",
year = "2019",
abstract = "Triethanolamine was applied as an efficient „green“ cosolvent for biodiesel production by CaO-catalyzed ethanolysis of sunflower oil. The reaction was conducted in a batch stirred reactor and optimized with respect to the reaction temperature (61.6-78.4 °C), the ethanol-to-oil molar ratio (7:1-17:1) and the cosolvent loading (3-36 % of the oil weight) by using a rotatable central composite design (RCCD) combined with the response surface methodology (RSM). The optimal reaction conditions were found to be: the ethanol-to-oil molar ratio of 9:1, the reaction temperature of 75 °C and the cosolvent loading of 30 % to oil weight, which resulted in the predicted and actual fatty acid ethyl ester (FAEE) contents of 98.8 % and 97.9±1.3 %, respectively, achieved within only 20 min of the reaction. Also, high FAEE contents were obtained with expired sunflower oil, hempseed oil and waste lard. X-ray diffraction analysis (XRD) was used to understand the changes in the CaO phase. The CaO catalyst can be used without any treatment in two consecutive cycles. Due to the calcium leaching into the product, an additional purification stage must be included in the overall process.",
journal = "Hemijska industrija",
title = "Triethanolamine as an efficient cosolvent for biodiesel production by CaO-catalyzed sunflower oil ethanolysis: An optimization study",
pages = "351-362",
volume = "73",
number = "6",
doi = "10.2298/HEMIND190822033D",
url = "https://hdl.handle.net/21.15107/rcub_dais_7041"
}

Đokić-Stojanović, D. R., Todorović, Z. B., Troter, D. Z., Stamenković, O. S., Veselinović, L., Zdujić, M., Manojlović, D. D.,& Veljković, V. B.. (2019). Triethanolamine as an efficient cosolvent for biodiesel production by CaO-catalyzed sunflower oil ethanolysis: An optimization study. in Hemijska industrija, 73(6), 351-362.
https://doi.org/10.2298/HEMIND190822033D
https://hdl.handle.net/21.15107/rcub_dais_7041

Đokić-Stojanović DR, Todorović ZB, Troter DZ, Stamenković OS, Veselinović L, Zdujić M, Manojlović DD, Veljković VB. Triethanolamine as an efficient cosolvent for biodiesel production by CaO-catalyzed sunflower oil ethanolysis: An optimization study. in Hemijska industrija. 2019;73(6):351-362.
doi:10.2298/HEMIND190822033D
https://hdl.handle.net/21.15107/rcub_dais_7041 .

Đokić-Stojanović, Dušica R., Todorović, Zoran B., Troter, Dragan Z., Stamenković, Olivera S., Veselinović, Ljiljana, Zdujić, Miodrag, Manojlović, Dragan D., Veljković, Vlada B., "Triethanolamine as an efficient cosolvent for biodiesel production by CaO-catalyzed sunflower oil ethanolysis: An optimization study" in Hemijska industrija, 73, no. 6 (2019):351-362,
https://doi.org/10.2298/HEMIND190822033D .,
https://hdl.handle.net/21.15107/rcub_dais_7041 .

TY  - DATA
AU  - Đokić-Stojanović, Dušica R.
AU  - Todorović, Zoran B.
AU  - Troter, Dragan Z.
AU  - Stamenković, Olivera S.
AU  - Veselinović, Ljiljana
AU  - Zdujić, Miodrag
AU  - Manojlović, Dragan D.
AU  - Veljković, Vlada B.
PY  - 2019
UR  - https://www.ache-pub.org.rs/index.php/HemInd/article/view/587/pdf_1
UR  - https://dais.sanu.ac.rs/123456789/7043
AB  - Figure D1. Normal probability plot of residuals (a), Cook's distances (b) and predicted and actual values of FAEE content (c); Table D1. Results of sequential model sum of squares test; Table D2. Results of lack of fit test; Table D3. Results of model summary statistics test
T2  - Hemijska industrija
T1  - Supplementary material to Triethanolamine as an efficient cosolvent for biodiesel production by CaO-catalyzed sunflower oil ethanolysis: An optimization study
SP  - D17
EP  - D18
VL  - 73
IS  - 6
UR  - https://hdl.handle.net/21.15107/rcub_dais_7043
ER  - 

@misc{
author = "Đokić-Stojanović, Dušica R. and Todorović, Zoran B. and Troter, Dragan Z. and Stamenković, Olivera S. and Veselinović, Ljiljana and Zdujić, Miodrag and Manojlović, Dragan D. and Veljković, Vlada B.",
year = "2019",
abstract = "Figure D1. Normal probability plot of residuals (a), Cook's distances (b) and predicted and actual values of FAEE content (c); Table D1. Results of sequential model sum of squares test; Table D2. Results of lack of fit test; Table D3. Results of model summary statistics test",
journal = "Hemijska industrija",
title = "Supplementary material to Triethanolamine as an efficient cosolvent for biodiesel production by CaO-catalyzed sunflower oil ethanolysis: An optimization study",
pages = "D17-D18",
volume = "73",
number = "6",
url = "https://hdl.handle.net/21.15107/rcub_dais_7043"
}

Đokić-Stojanović, D. R., Todorović, Z. B., Troter, D. Z., Stamenković, O. S., Veselinović, L., Zdujić, M., Manojlović, D. D.,& Veljković, V. B.. (2019). Supplementary material to Triethanolamine as an efficient cosolvent for biodiesel production by CaO-catalyzed sunflower oil ethanolysis: An optimization study. in Hemijska industrija, 73(6), D17-D18.
https://hdl.handle.net/21.15107/rcub_dais_7043

Đokić-Stojanović DR, Todorović ZB, Troter DZ, Stamenković OS, Veselinović L, Zdujić M, Manojlović DD, Veljković VB. Supplementary material to Triethanolamine as an efficient cosolvent for biodiesel production by CaO-catalyzed sunflower oil ethanolysis: An optimization study. in Hemijska industrija. 2019;73(6):D17-D18.
https://hdl.handle.net/21.15107/rcub_dais_7043 .

Đokić-Stojanović, Dušica R., Todorović, Zoran B., Troter, Dragan Z., Stamenković, Olivera S., Veselinović, Ljiljana, Zdujić, Miodrag, Manojlović, Dragan D., Veljković, Vlada B., "Supplementary material to Triethanolamine as an efficient cosolvent for biodiesel production by CaO-catalyzed sunflower oil ethanolysis: An optimization study" in Hemijska industrija, 73, no. 6 (2019):D17-D18,
https://hdl.handle.net/21.15107/rcub_dais_7043 .

TY  - DATA
AU  - Zdujić, Miodrag
AU  - Lukić, Ivana
AU  - Kesić, Željka
AU  - Janković-Častvan, Ivona
AU  - Marković, Smilja
AU  - Jovalekić, Čedomir
AU  - Skala, Dejan
PY  - 2019
UR  - http://www.sciencedirect.com/science/article/pii/S0921883119300615
UR  - https://dais.sanu.ac.rs/123456789/5974
AB  - The UV–vis diffuse reflectance (DRS) spectra and Kubelka-Munk transformed reflectance spectra of the samples calcined at 700 and 900 oC along
with starting CaO and SiO2 powders used for the synthesis
T2  - Advanced Powder Technology
T1  - Supporting information for the article: Zdujić, M., Lukić, I., Kesić, Ž., Janković-Častvan, I., Marković, S., Jovalekić, Č., Skala, D., 2019.  Synthesis  of  CaOSiO2  compounds  and  their  testing  as  heterogeneous  catalysts  for transesterification of sunflower oil. Advanced Powder Technology. https://doi.org/10.1016/j.apt.2019.03.009
UR  - https://hdl.handle.net/21.15107/rcub_dais_5974
ER  - 

@misc{
author = "Zdujić, Miodrag and Lukić, Ivana and Kesić, Željka and Janković-Častvan, Ivona and Marković, Smilja and Jovalekić, Čedomir and Skala, Dejan",
year = "2019",
abstract = "The UV–vis diffuse reflectance (DRS) spectra and Kubelka-Munk transformed reflectance spectra of the samples calcined at 700 and 900 oC along
with starting CaO and SiO2 powders used for the synthesis",
journal = "Advanced Powder Technology",
title = "Supporting information for the article: Zdujić, M., Lukić, I., Kesić, Ž., Janković-Častvan, I., Marković, S., Jovalekić, Č., Skala, D., 2019.  Synthesis  of  CaOSiO2  compounds  and  their  testing  as  heterogeneous  catalysts  for transesterification of sunflower oil. Advanced Powder Technology. https://doi.org/10.1016/j.apt.2019.03.009",
url = "https://hdl.handle.net/21.15107/rcub_dais_5974"
}

Zdujić, M., Lukić, I., Kesić, Ž., Janković-Častvan, I., Marković, S., Jovalekić, Č.,& Skala, D.. (2019). Supporting information for the article: Zdujić, M., Lukić, I., Kesić, Ž., Janković-Častvan, I., Marković, S., Jovalekić, Č., Skala, D., 2019.  Synthesis  of  CaOSiO2  compounds  and  their  testing  as  heterogeneous  catalysts  for transesterification of sunflower oil. Advanced Powder Technology. https://doi.org/10.1016/j.apt.2019.03.009. in Advanced Powder Technology.
https://hdl.handle.net/21.15107/rcub_dais_5974

Zdujić M, Lukić I, Kesić Ž, Janković-Častvan I, Marković S, Jovalekić Č, Skala D. Supporting information for the article: Zdujić, M., Lukić, I., Kesić, Ž., Janković-Častvan, I., Marković, S., Jovalekić, Č., Skala, D., 2019.  Synthesis  of  CaOSiO2  compounds  and  their  testing  as  heterogeneous  catalysts  for transesterification of sunflower oil. Advanced Powder Technology. https://doi.org/10.1016/j.apt.2019.03.009. in Advanced Powder Technology. 2019;.
https://hdl.handle.net/21.15107/rcub_dais_5974 .

Zdujić, Miodrag, Lukić, Ivana, Kesić, Željka, Janković-Častvan, Ivona, Marković, Smilja, Jovalekić, Čedomir, Skala, Dejan, "Supporting information for the article: Zdujić, M., Lukić, I., Kesić, Ž., Janković-Častvan, I., Marković, S., Jovalekić, Č., Skala, D., 2019.  Synthesis  of  CaOSiO2  compounds  and  their  testing  as  heterogeneous  catalysts  for transesterification of sunflower oil. Advanced Powder Technology. https://doi.org/10.1016/j.apt.2019.03.009" in Advanced Powder Technology (2019),
https://hdl.handle.net/21.15107/rcub_dais_5974 .

TY  - JOUR
AU  - Zdujić, Miodrag
AU  - Lukić, Ivana
AU  - Kesić, Željka
AU  - Janković-Častvan, Ivona
AU  - Marković, Smilja
AU  - Jovalekić, Čedomir
AU  - Skala, Dejan
PY  - 2019
UR  - http://www.sciencedirect.com/science/article/pii/S0921883119300615
UR  - https://dais.sanu.ac.rs/123456789/5802
AB  - The powder mixtures of calcium oxide (CaO) and silica gel (SiO2) in molar ratios of 1:1, 1.5:1, 2:1 and 3:1 were mechanochemically treated with the addition of water, and were subsequently calcined with a goal of synthesizing CaSiO3, Ca3Si2O7, Ca2SiO4 compounds and CaO/Ca2SiO4 two-phase mixture. The prepared materials were characterized by XRD, FTIR, SEM/EDS, particle size laser diffraction (PSLD), UV–vis diffuse reflectance spectroscopy (DRS), N2 adsorption/desorption isotherms, Hammett indicator for basic strength and volumetric analysis for free CaO content. The catalytic activity of calcium silicates with different Ca/Si ratios was tested in the transesterification of triacylglycerols (sunflower oil) with methanol. Samples obtained with initial composition 2CaO·SiO2 and 3CaO·SiO2 calcined at 700 °C, and 3CaO·SiO2 calcined at 900 °C had high catalytic activity, resulting with triacylglycerols conversion and fatty acids methyl ester formation (FAME or biodiesel) above 96%. The activity of these samples can be attributed to the existence of free CaO defined by CaO/Ca2SiO4 complex mixture. The effect of different amount of catalyst used for transesterification (0.2–2 wt%) was analyzed using the most active catalyst i.e. 3CaO·SiO2 calcined at 700 °C as well as possibility of its reuse for biodiesel synthesis. It was also found that CaSiO3, Ca3Si2O7 and Ca2SiO4, phases did not possess catalytic activity.
PB  - Elsevier
T2  - Advanced Powder Technology
T1  - Synthesis of CaOSiO2 compounds and their testing as heterogeneous catalysts for transesterification of sunflower oil
SP  - 1141
EP  - 1150
VL  - 30
IS  - 6
DO  - 10.1016/j.apt.2019.03.009
UR  - https://hdl.handle.net/21.15107/rcub_dais_5802
ER  - 

@article{
author = "Zdujić, Miodrag and Lukić, Ivana and Kesić, Željka and Janković-Častvan, Ivona and Marković, Smilja and Jovalekić, Čedomir and Skala, Dejan",
year = "2019",
abstract = "The powder mixtures of calcium oxide (CaO) and silica gel (SiO2) in molar ratios of 1:1, 1.5:1, 2:1 and 3:1 were mechanochemically treated with the addition of water, and were subsequently calcined with a goal of synthesizing CaSiO3, Ca3Si2O7, Ca2SiO4 compounds and CaO/Ca2SiO4 two-phase mixture. The prepared materials were characterized by XRD, FTIR, SEM/EDS, particle size laser diffraction (PSLD), UV–vis diffuse reflectance spectroscopy (DRS), N2 adsorption/desorption isotherms, Hammett indicator for basic strength and volumetric analysis for free CaO content. The catalytic activity of calcium silicates with different Ca/Si ratios was tested in the transesterification of triacylglycerols (sunflower oil) with methanol. Samples obtained with initial composition 2CaO·SiO2 and 3CaO·SiO2 calcined at 700 °C, and 3CaO·SiO2 calcined at 900 °C had high catalytic activity, resulting with triacylglycerols conversion and fatty acids methyl ester formation (FAME or biodiesel) above 96%. The activity of these samples can be attributed to the existence of free CaO defined by CaO/Ca2SiO4 complex mixture. The effect of different amount of catalyst used for transesterification (0.2–2 wt%) was analyzed using the most active catalyst i.e. 3CaO·SiO2 calcined at 700 °C as well as possibility of its reuse for biodiesel synthesis. It was also found that CaSiO3, Ca3Si2O7 and Ca2SiO4, phases did not possess catalytic activity.",
publisher = "Elsevier",
journal = "Advanced Powder Technology",
title = "Synthesis of CaOSiO2 compounds and their testing as heterogeneous catalysts for transesterification of sunflower oil",
pages = "1141-1150",
volume = "30",
number = "6",
doi = "10.1016/j.apt.2019.03.009",
url = "https://hdl.handle.net/21.15107/rcub_dais_5802"
}

Zdujić, M., Lukić, I., Kesić, Ž., Janković-Častvan, I., Marković, S., Jovalekić, Č.,& Skala, D.. (2019). Synthesis of CaOSiO2 compounds and their testing as heterogeneous catalysts for transesterification of sunflower oil. in Advanced Powder Technology
Elsevier., 30(6), 1141-1150.
https://doi.org/10.1016/j.apt.2019.03.009
https://hdl.handle.net/21.15107/rcub_dais_5802

Zdujić M, Lukić I, Kesić Ž, Janković-Častvan I, Marković S, Jovalekić Č, Skala D. Synthesis of CaOSiO2 compounds and their testing as heterogeneous catalysts for transesterification of sunflower oil. in Advanced Powder Technology. 2019;30(6):1141-1150.
doi:10.1016/j.apt.2019.03.009
https://hdl.handle.net/21.15107/rcub_dais_5802 .

Zdujić, Miodrag, Lukić, Ivana, Kesić, Željka, Janković-Častvan, Ivona, Marković, Smilja, Jovalekić, Čedomir, Skala, Dejan, "Synthesis of CaOSiO2 compounds and their testing as heterogeneous catalysts for transesterification of sunflower oil" in Advanced Powder Technology, 30, no. 6 (2019):1141-1150,
https://doi.org/10.1016/j.apt.2019.03.009 .,
https://hdl.handle.net/21.15107/rcub_dais_5802 .

TY  - JOUR
AU  - Zdujić, Miodrag
AU  - Lukić, Ivana
AU  - Kesić, Željka
AU  - Janković-Častvan, Ivona
AU  - Marković, Smilja
AU  - Jovalekić, Čedomir
AU  - Skala, Dejan
PY  - 2019
UR  - http://www.sciencedirect.com/science/article/pii/S0921883119300615
UR  - https://dais.sanu.ac.rs/123456789/5142
AB  - The powder mixtures of calcium oxide (CaO) and silica gel (SiO2) in molar ratios of 1:1, 1.5:1, 2:1 and 3:1 were mechanochemically treated with the addition of water, and were subsequently calcined with a goal of synthesizing CaSiO3, Ca3Si2O7, Ca2SiO4 compounds and CaO/Ca2SiO4 two-phase mixture. The prepared materials were characterized by XRD, FTIR, SEM/EDS, particle size laser diffraction (PSLD), UV–vis diffuse reflectance spectroscopy (DRS), N2 adsorption/desorption isotherms, Hammett indicator for basic strength and volumetric analysis for free CaO content. The catalytic activity of calcium silicates with different Ca/Si ratios was tested in the transesterification of triacylglycerols (sunflower oil) with methanol. Samples obtained with initial composition 2CaO·SiO2 and 3CaO·SiO2 calcined at 700 °C, and 3CaO·SiO2 calcined at 900 °C had high catalytic activity, resulting with triacylglycerols conversion and fatty acids methyl ester formation (FAME or biodiesel) above 96%. The activity of these samples can be attributed to the existence of free CaO defined by CaO/Ca2SiO4 complex mixture. The effect of different amount of catalyst used for transesterification (0.2–2 wt%) was analyzed using the most active catalyst i.e. 3CaO·SiO2 calcined at 700 °C as well as possibility of its reuse for biodiesel synthesis. It was also found that CaSiO3, Ca3Si2O7 and Ca2SiO4, phases did not possess catalytic activity.
PB  - Elsevier
T2  - Advanced Powder Technology
T1  - Synthesis of CaOSiO2 compounds and their testing as heterogeneous catalysts for transesterification of sunflower oil
SP  - 1141
EP  - 1150
VL  - 30
IS  - 6
DO  - 10.1016/j.apt.2019.03.009
UR  - https://hdl.handle.net/21.15107/rcub_dais_5142
ER  - 

@article{
author = "Zdujić, Miodrag and Lukić, Ivana and Kesić, Željka and Janković-Častvan, Ivona and Marković, Smilja and Jovalekić, Čedomir and Skala, Dejan",
year = "2019",
abstract = "The powder mixtures of calcium oxide (CaO) and silica gel (SiO2) in molar ratios of 1:1, 1.5:1, 2:1 and 3:1 were mechanochemically treated with the addition of water, and were subsequently calcined with a goal of synthesizing CaSiO3, Ca3Si2O7, Ca2SiO4 compounds and CaO/Ca2SiO4 two-phase mixture. The prepared materials were characterized by XRD, FTIR, SEM/EDS, particle size laser diffraction (PSLD), UV–vis diffuse reflectance spectroscopy (DRS), N2 adsorption/desorption isotherms, Hammett indicator for basic strength and volumetric analysis for free CaO content. The catalytic activity of calcium silicates with different Ca/Si ratios was tested in the transesterification of triacylglycerols (sunflower oil) with methanol. Samples obtained with initial composition 2CaO·SiO2 and 3CaO·SiO2 calcined at 700 °C, and 3CaO·SiO2 calcined at 900 °C had high catalytic activity, resulting with triacylglycerols conversion and fatty acids methyl ester formation (FAME or biodiesel) above 96%. The activity of these samples can be attributed to the existence of free CaO defined by CaO/Ca2SiO4 complex mixture. The effect of different amount of catalyst used for transesterification (0.2–2 wt%) was analyzed using the most active catalyst i.e. 3CaO·SiO2 calcined at 700 °C as well as possibility of its reuse for biodiesel synthesis. It was also found that CaSiO3, Ca3Si2O7 and Ca2SiO4, phases did not possess catalytic activity.",
publisher = "Elsevier",
journal = "Advanced Powder Technology",
title = "Synthesis of CaOSiO2 compounds and their testing as heterogeneous catalysts for transesterification of sunflower oil",
pages = "1141-1150",
volume = "30",
number = "6",
doi = "10.1016/j.apt.2019.03.009",
url = "https://hdl.handle.net/21.15107/rcub_dais_5142"
}

Zdujić, M., Lukić, I., Kesić, Ž., Janković-Častvan, I., Marković, S., Jovalekić, Č.,& Skala, D.. (2019). Synthesis of CaOSiO2 compounds and their testing as heterogeneous catalysts for transesterification of sunflower oil. in Advanced Powder Technology
Elsevier., 30(6), 1141-1150.
https://doi.org/10.1016/j.apt.2019.03.009
https://hdl.handle.net/21.15107/rcub_dais_5142

Zdujić M, Lukić I, Kesić Ž, Janković-Častvan I, Marković S, Jovalekić Č, Skala D. Synthesis of CaOSiO2 compounds and their testing as heterogeneous catalysts for transesterification of sunflower oil. in Advanced Powder Technology. 2019;30(6):1141-1150.
doi:10.1016/j.apt.2019.03.009
https://hdl.handle.net/21.15107/rcub_dais_5142 .

Zdujić, Miodrag, Lukić, Ivana, Kesić, Željka, Janković-Častvan, Ivona, Marković, Smilja, Jovalekić, Čedomir, Skala, Dejan, "Synthesis of CaOSiO2 compounds and their testing as heterogeneous catalysts for transesterification of sunflower oil" in Advanced Powder Technology, 30, no. 6 (2019):1141-1150,
https://doi.org/10.1016/j.apt.2019.03.009 .,
https://hdl.handle.net/21.15107/rcub_dais_5142 .

TY  - JOUR
AU  - Zdujić, Miodrag
AU  - Petrović, Slobodan D.
AU  - Valentić, Nataša V.
AU  - Mijin, Dušan
PY  - 2019
UR  - https://scindeks.ceon.rs/article.aspx?artid=0351-94651903229Z
UR  - http://www.ncbi.nlm.nih.gov/pubmed/0351-94651903229Z
UR  - https://dais.sanu.ac.rs/123456789/6954
AB  - Milling of cyanoacetamide and acetoacetic ester as reactants, in the presence of KOH as the catalyst and ethanol as a viscous control agent (VCA) was performed in a planetary ball mill with the goal of investigating the effect of mechanochemical treatment for the synthesis of 3-cyano-6hydroxy-4-methyl-2-pyridone at room temperature. The mechanochemical synthesis was performed under various milling parameters, i.e. milling time up to 4 h, number and size of balls, angular velocity as well as molar ratio of reactants and the amount of catalyst. The obtained product was characterized by m.p., UV, IR and NMR data. It was fond that the dominant process parameter is the milling time while others are of less importance. The highest isolated yield after milling was up to 56%. The combination of milling and aging increase yield over 60%.
PB  - Belgrade : Engineers Society of Corrosion
T2  - Zaštita materijala
T1  - On the synthesis of 3-cyano-6-hydroxy-4-methyl-2-pyridone at room temperature
SP  - 229
EP  - 236
VL  - 60
IS  - 3
DO  - 10.5937/zasmat1903229Z
UR  - https://hdl.handle.net/21.15107/rcub_dais_6954
ER  - 

@article{
author = "Zdujić, Miodrag and Petrović, Slobodan D. and Valentić, Nataša V. and Mijin, Dušan",
year = "2019",
abstract = "Milling of cyanoacetamide and acetoacetic ester as reactants, in the presence of KOH as the catalyst and ethanol as a viscous control agent (VCA) was performed in a planetary ball mill with the goal of investigating the effect of mechanochemical treatment for the synthesis of 3-cyano-6hydroxy-4-methyl-2-pyridone at room temperature. The mechanochemical synthesis was performed under various milling parameters, i.e. milling time up to 4 h, number and size of balls, angular velocity as well as molar ratio of reactants and the amount of catalyst. The obtained product was characterized by m.p., UV, IR and NMR data. It was fond that the dominant process parameter is the milling time while others are of less importance. The highest isolated yield after milling was up to 56%. The combination of milling and aging increase yield over 60%.",
publisher = "Belgrade : Engineers Society of Corrosion",
journal = "Zaštita materijala",
title = "On the synthesis of 3-cyano-6-hydroxy-4-methyl-2-pyridone at room temperature",
pages = "229-236",
volume = "60",
number = "3",
doi = "10.5937/zasmat1903229Z",
url = "https://hdl.handle.net/21.15107/rcub_dais_6954"
}

Zdujić, M., Petrović, S. D., Valentić, N. V.,& Mijin, D.. (2019). On the synthesis of 3-cyano-6-hydroxy-4-methyl-2-pyridone at room temperature. in Zaštita materijala
Belgrade : Engineers Society of Corrosion., 60(3), 229-236.
https://doi.org/10.5937/zasmat1903229Z
https://hdl.handle.net/21.15107/rcub_dais_6954

Zdujić M, Petrović SD, Valentić NV, Mijin D. On the synthesis of 3-cyano-6-hydroxy-4-methyl-2-pyridone at room temperature. in Zaštita materijala. 2019;60(3):229-236.
doi:10.5937/zasmat1903229Z
https://hdl.handle.net/21.15107/rcub_dais_6954 .

Zdujić, Miodrag, Petrović, Slobodan D., Valentić, Nataša V., Mijin, Dušan, "On the synthesis of 3-cyano-6-hydroxy-4-methyl-2-pyridone at room temperature" in Zaštita materijala, 60, no. 3 (2019):229-236,
https://doi.org/10.5937/zasmat1903229Z .,
https://hdl.handle.net/21.15107/rcub_dais_6954 .

TY  - JOUR
AU  - Stefanović, Ivan S.
AU  - Dostanić, Jasmina
AU  - Lončarević, Davor
AU  - Vasiljević Radović, Dana
AU  - Ostojić, Sanja
AU  - Marković, Smilja
AU  - Pergal, Marija V.
PY  - 2019
UR  - https://dais.sanu.ac.rs/123456789/5761
AB  - This work is focused on preparation of poly(urethane-siloxane)/titanium-dioxide nanocomposites (PUSNs) with enhanced features. PUSNs were prepared by the in situ polymerization reaction using titanium-dioxide as a nano-filler in different amounts (1, 2, 3 and 5 wt.%) with respect to the poly(urethane-siloxane) (PUS) matrix. PUS copolymer was based on α,ω-dihy-droxy-ethoxypropyl-poly(dimethylsiloxane), 4,4’-methylenediphenyldiisocyanate and 1,4-bu-tanediole. In order to investigate the influence of TiO 2 content on the structure, UV resistance, thermal properties, hydrophobicity and morphology of the prepared PUSNs, FTIR spectroscopy, UV-Vis diffuse-reflectance spectroscopy, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), contact angle measurements, surface free energy (SFE) analysis, water absorption, scanning electron microscopy (SEM) and atomic force microscopy (AFM) were performed. The PUSNs showed excellent UV resistance, high hydrophobicity, low surface free energy and also higher thermal stability and rougher surface and cross-section relief structure as compared to the pure PUS copolymer. Based on the obtained results it can be concluded that prepared PUSNs could be potentially used as protective coatings. © 2019, Association of Chemists and Chemical Engineers of Serbia. All rights reserved.
PB  - Association of the Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - Preparation and characterization of poly(Urethane-siloxane)/titanium-dioxide nanocomposites
SP  - 13
EP  - 24
VL  - 73
IS  - 1
DO  - 10.2298/HEMIND180530002S
UR  - https://hdl.handle.net/21.15107/rcub_dais_5761
ER  - 

@article{
author = "Stefanović, Ivan S. and Dostanić, Jasmina and Lončarević, Davor and Vasiljević Radović, Dana and Ostojić, Sanja and Marković, Smilja and Pergal, Marija V.",
year = "2019",
abstract = "This work is focused on preparation of poly(urethane-siloxane)/titanium-dioxide nanocomposites (PUSNs) with enhanced features. PUSNs were prepared by the in situ polymerization reaction using titanium-dioxide as a nano-filler in different amounts (1, 2, 3 and 5 wt.%) with respect to the poly(urethane-siloxane) (PUS) matrix. PUS copolymer was based on α,ω-dihy-droxy-ethoxypropyl-poly(dimethylsiloxane), 4,4’-methylenediphenyldiisocyanate and 1,4-bu-tanediole. In order to investigate the influence of TiO 2 content on the structure, UV resistance, thermal properties, hydrophobicity and morphology of the prepared PUSNs, FTIR spectroscopy, UV-Vis diffuse-reflectance spectroscopy, differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), contact angle measurements, surface free energy (SFE) analysis, water absorption, scanning electron microscopy (SEM) and atomic force microscopy (AFM) were performed. The PUSNs showed excellent UV resistance, high hydrophobicity, low surface free energy and also higher thermal stability and rougher surface and cross-section relief structure as compared to the pure PUS copolymer. Based on the obtained results it can be concluded that prepared PUSNs could be potentially used as protective coatings. © 2019, Association of Chemists and Chemical Engineers of Serbia. All rights reserved.",
publisher = "Association of the Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "Preparation and characterization of poly(Urethane-siloxane)/titanium-dioxide nanocomposites",
pages = "13-24",
volume = "73",
number = "1",
doi = "10.2298/HEMIND180530002S",
url = "https://hdl.handle.net/21.15107/rcub_dais_5761"
}

Stefanović, I. S., Dostanić, J., Lončarević, D., Vasiljević Radović, D., Ostojić, S., Marković, S.,& Pergal, M. V.. (2019). Preparation and characterization of poly(Urethane-siloxane)/titanium-dioxide nanocomposites. in Hemijska industrija
Association of the Chemical Engineers of Serbia., 73(1), 13-24.
https://doi.org/10.2298/HEMIND180530002S
https://hdl.handle.net/21.15107/rcub_dais_5761

Stefanović IS, Dostanić J, Lončarević D, Vasiljević Radović D, Ostojić S, Marković S, Pergal MV. Preparation and characterization of poly(Urethane-siloxane)/titanium-dioxide nanocomposites. in Hemijska industrija. 2019;73(1):13-24.
doi:10.2298/HEMIND180530002S
https://hdl.handle.net/21.15107/rcub_dais_5761 .

Stefanović, Ivan S., Dostanić, Jasmina, Lončarević, Davor, Vasiljević Radović, Dana, Ostojić, Sanja, Marković, Smilja, Pergal, Marija V., "Preparation and characterization of poly(Urethane-siloxane)/titanium-dioxide nanocomposites" in Hemijska industrija, 73, no. 1 (2019):13-24,
https://doi.org/10.2298/HEMIND180530002S .,
https://hdl.handle.net/21.15107/rcub_dais_5761 .

TY  - DATA
AU  - Troter, Dragan Z.
AU  - Todorović, Zoran B.
AU  - Đokić Stojanović, Dušica R.
AU  - Veselinović, Ljiljana
AU  - Zdujić, Miodrag
AU  - Veljković, Vlada B.
PY  - 2018
UR  - https://dais.sanu.ac.rs/123456789/3772
AB  - Fig. S.1 The variations of the FAEE content with the progress of expired sunflower oils ethanolysis catalyzed by non-calcined CaO, calcined CaO, Ca(OH)2 and CaCO3; Fig. S.2 Temperature dependence of the density (a) and the viscosity (b) of ethanol and ethanol mixed with the studied DESs: ChCl:EG, ChCl:PG, ChCl:G, ChCl:U, ChCl:DMU and ChCl:TU; Fig. S.3 Reusability of non-calcined CaO catalyst activated by different DESs. CaO activated with a DES was used in the first batch, while only the recovered CaO was used in the other
batches; 4
Fig. S.4 The FAEE content after 2 h reaction in four consecutive batches of the sunflower oil
ethanolysis catalyzed by either fresh or recovered CaO catalysts in the presence of the
recovered ChCl:G DES as a cosolvent (70 °C and the ethanol-to-oil molar ratio was 12:1;
reaction systems: recovered ChCl:G DES/glycerol product and recovered CaO - black rectangles, recovered ChCl:G DES/glycerol product and fesh CaO - white rectangles, and
treated recovered ChCl:G DES/glycerol product was coupled with fresh CaO - gray rectangles)
T2  - Journal of Molecular Liquids
T1  - Supplementary material for the article: Troter, D.Z., Todorović, Z.B., Đokić-Stojanović, D.R., Veselinović, L.M., Zdujić, M.V., Veljković, V.B., 2018. Choline chloride-based deep eutectic solvents in CaO-catalyzed ethanolysis of expired sunflower oil. Journal of Molecular Liquids 266, 557–567. https://doi.org/10.1016/j.molliq.2018.06.106
VL  - 266
UR  - https://hdl.handle.net/21.15107/rcub_dais_3772
ER  - 

@misc{
author = "Troter, Dragan Z. and Todorović, Zoran B. and Đokić Stojanović, Dušica R. and Veselinović, Ljiljana and Zdujić, Miodrag and Veljković, Vlada B.",
year = "2018",
abstract = "Fig. S.1 The variations of the FAEE content with the progress of expired sunflower oils ethanolysis catalyzed by non-calcined CaO, calcined CaO, Ca(OH)2 and CaCO3; Fig. S.2 Temperature dependence of the density (a) and the viscosity (b) of ethanol and ethanol mixed with the studied DESs: ChCl:EG, ChCl:PG, ChCl:G, ChCl:U, ChCl:DMU and ChCl:TU; Fig. S.3 Reusability of non-calcined CaO catalyst activated by different DESs. CaO activated with a DES was used in the first batch, while only the recovered CaO was used in the other
batches; 4
Fig. S.4 The FAEE content after 2 h reaction in four consecutive batches of the sunflower oil
ethanolysis catalyzed by either fresh or recovered CaO catalysts in the presence of the
recovered ChCl:G DES as a cosolvent (70 °C and the ethanol-to-oil molar ratio was 12:1;
reaction systems: recovered ChCl:G DES/glycerol product and recovered CaO - black rectangles, recovered ChCl:G DES/glycerol product and fesh CaO - white rectangles, and
treated recovered ChCl:G DES/glycerol product was coupled with fresh CaO - gray rectangles)",
journal = "Journal of Molecular Liquids",
title = "Supplementary material for the article: Troter, D.Z., Todorović, Z.B., Đokić-Stojanović, D.R., Veselinović, L.M., Zdujić, M.V., Veljković, V.B., 2018. Choline chloride-based deep eutectic solvents in CaO-catalyzed ethanolysis of expired sunflower oil. Journal of Molecular Liquids 266, 557–567. https://doi.org/10.1016/j.molliq.2018.06.106",
volume = "266",
url = "https://hdl.handle.net/21.15107/rcub_dais_3772"
}

Troter, D. Z., Todorović, Z. B., Đokić Stojanović, D. R., Veselinović, L., Zdujić, M.,& Veljković, V. B.. (2018). Supplementary material for the article: Troter, D.Z., Todorović, Z.B., Đokić-Stojanović, D.R., Veselinović, L.M., Zdujić, M.V., Veljković, V.B., 2018. Choline chloride-based deep eutectic solvents in CaO-catalyzed ethanolysis of expired sunflower oil. Journal of Molecular Liquids 266, 557–567. https://doi.org/10.1016/j.molliq.2018.06.106. in Journal of Molecular Liquids, 266.
https://hdl.handle.net/21.15107/rcub_dais_3772

Troter DZ, Todorović ZB, Đokić Stojanović DR, Veselinović L, Zdujić M, Veljković VB. Supplementary material for the article: Troter, D.Z., Todorović, Z.B., Đokić-Stojanović, D.R., Veselinović, L.M., Zdujić, M.V., Veljković, V.B., 2018. Choline chloride-based deep eutectic solvents in CaO-catalyzed ethanolysis of expired sunflower oil. Journal of Molecular Liquids 266, 557–567. https://doi.org/10.1016/j.molliq.2018.06.106. in Journal of Molecular Liquids. 2018;266.
https://hdl.handle.net/21.15107/rcub_dais_3772 .

Troter, Dragan Z., Todorović, Zoran B., Đokić Stojanović, Dušica R., Veselinović, Ljiljana, Zdujić, Miodrag, Veljković, Vlada B., "Supplementary material for the article: Troter, D.Z., Todorović, Z.B., Đokić-Stojanović, D.R., Veselinović, L.M., Zdujić, M.V., Veljković, V.B., 2018. Choline chloride-based deep eutectic solvents in CaO-catalyzed ethanolysis of expired sunflower oil. Journal of Molecular Liquids 266, 557–567. https://doi.org/10.1016/j.molliq.2018.06.106" in Journal of Molecular Liquids, 266 (2018),
https://hdl.handle.net/21.15107/rcub_dais_3772 .

TY  - CONF
AU  - Aleksić, Jelena
AU  - Barudžija, Tanja
AU  - Mitrić, Miodrag
AU  - Jugović, Dragana
AU  - Kostić, Ljiljana
PY  - 2018
UR  - https://dais.sanu.ac.rs/123456789/4092
AB  - In this work, the polycrystalline samples Y1-xYbxF3 (x = 0.01, 0.05, 0.1, 0.25, 0.5, 0.75 and 1) were synthesized and characterized by X-ray powder diffraction and magnetic measurements. In the first stage of synthesis, mixed sesquioxides (Y1-xYbx)2O3 were obtained by ceramic technology. In the second stage, obtained mixed sesquioxides were treated with an excess of ammonium hydrogen fluoride in air at 170 °C for 20 h. In the third and last stage, Y1-xYbxF3 samples were obtained by heating the product from the second stage of synthesis at 500 °C for 3 h in an inert atmosphere. The X-ray diffraction revealed that the crystal structure of the Y1-xYbxF3 solid solution is orthorhombic (YF3 structural type). The structure refinements were done by the Rietveld full-profile method within Pnma space group. Magnetic susceptibility measurements of all samples were done in a temperature range 2-300 K by SQUID magnetometer. The relation between magnetic and structural properties was discussed.
PB  - Belgrade : Serbian Ceramic Society
C3  - Program and the Book of Abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application VII : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 17-19 September 2018
T1  - Structural and magnetic properties of Y1-xYbxF3 solid solution
SP  - 99
EP  - 99
UR  - https://hdl.handle.net/21.15107/rcub_dais_4092
ER  - 

@conference{
author = "Aleksić, Jelena and Barudžija, Tanja and Mitrić, Miodrag and Jugović, Dragana and Kostić, Ljiljana",
year = "2018",
abstract = "In this work, the polycrystalline samples Y1-xYbxF3 (x = 0.01, 0.05, 0.1, 0.25, 0.5, 0.75 and 1) were synthesized and characterized by X-ray powder diffraction and magnetic measurements. In the first stage of synthesis, mixed sesquioxides (Y1-xYbx)2O3 were obtained by ceramic technology. In the second stage, obtained mixed sesquioxides were treated with an excess of ammonium hydrogen fluoride in air at 170 °C for 20 h. In the third and last stage, Y1-xYbxF3 samples were obtained by heating the product from the second stage of synthesis at 500 °C for 3 h in an inert atmosphere. The X-ray diffraction revealed that the crystal structure of the Y1-xYbxF3 solid solution is orthorhombic (YF3 structural type). The structure refinements were done by the Rietveld full-profile method within Pnma space group. Magnetic susceptibility measurements of all samples were done in a temperature range 2-300 K by SQUID magnetometer. The relation between magnetic and structural properties was discussed.",
publisher = "Belgrade : Serbian Ceramic Society",
journal = "Program and the Book of Abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application VII : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 17-19 September 2018",
title = "Structural and magnetic properties of Y1-xYbxF3 solid solution",
pages = "99-99",
url = "https://hdl.handle.net/21.15107/rcub_dais_4092"
}

Aleksić, J., Barudžija, T., Mitrić, M., Jugović, D.,& Kostić, L.. (2018). Structural and magnetic properties of Y1-xYbxF3 solid solution. in Program and the Book of Abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application VII : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 17-19 September 2018
Belgrade : Serbian Ceramic Society., 99-99.
https://hdl.handle.net/21.15107/rcub_dais_4092

Aleksić J, Barudžija T, Mitrić M, Jugović D, Kostić L. Structural and magnetic properties of Y1-xYbxF3 solid solution. in Program and the Book of Abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application VII : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 17-19 September 2018. 2018;:99-99.
https://hdl.handle.net/21.15107/rcub_dais_4092 .

Aleksić, Jelena, Barudžija, Tanja, Mitrić, Miodrag, Jugović, Dragana, Kostić, Ljiljana, "Structural and magnetic properties of Y1-xYbxF3 solid solution" in Program and the Book of Abstracts / Serbian Ceramic Society Conference Advanced Ceramics and Application VII : New Frontiers in Multifunctional Material Science and Processing, Serbia, Belgrade, 17-19 September 2018 (2018):99-99,
https://hdl.handle.net/21.15107/rcub_dais_4092 .

TY  - JOUR
AU  - Ilić, Biljana
AU  - Mitrović, Aleksandra
AU  - Miličić, Ljiljana
AU  - Zdujić, Miodrag
PY  - 2018
UR  - https://dais.sanu.ac.rs/123456789/4512
AB  - The effects of two different mechanically activated kaolins, AKV (61% kaolinite, 14% quartz and 16% mica) and AKG (51.6% kaolinite and 40.6% quartz) on the compressive strength of cement composites and microstructure of pastes were investigated. Composite mixtures, in which 10, 20, 30, 40 and 50% of ordinary Portland cement (OPC) was replaced by AKV or AKG, were prepared with w/b of 0.5, and exposed to different curing conditions (ordinary curing for 28 days and autoclaving). Factors affecting microstructure were investigated on pastes by X-ray diffraction (XRD), Differential thermal analysis/thermal gravimetry (DTA/TG) analyses, Mercury intrusion porosimetry (MIP) and Scanning electron microscopy with Energy-dispersive spectroscopy (SEM-EDS). AKG composites exhibited higher compressive strengths under both curing conditions. Positive autoclaving effects on strengths were predominantly pronounced at the higher cement replacement levels. Comparison of the autoclaved and ordinary cured paste microstructure, revealed more intensive pozzolanic reaction during autoclaving conditions (CH content near zero) and higher total porosity. The negative effect of hydrogarnet on the strength was compensated by the formation of the crystalline tobermorite. Obtained results revealed that mechanically activated kaolin, with high content of quartz, could be a promising pozzolanic addition, even at high cement replacement levels (30–50%), especially when autoclaving curing conditions were applied. © 2018 Elsevier Ltd
PB  - Elsevier
T2  - Construction and Building Materials
T1  - Compressive strength and microstructure of ordinary cured and autoclaved cement-based composites with mechanically activated kaolins
SP  - 92
EP  - 101
VL  - 178
DO  - 10.1016/j.conbuildmat.2018.05.144
UR  - https://hdl.handle.net/21.15107/rcub_dais_4512
ER  - 

@article{
author = "Ilić, Biljana and Mitrović, Aleksandra and Miličić, Ljiljana and Zdujić, Miodrag",
year = "2018",
abstract = "The effects of two different mechanically activated kaolins, AKV (61% kaolinite, 14% quartz and 16% mica) and AKG (51.6% kaolinite and 40.6% quartz) on the compressive strength of cement composites and microstructure of pastes were investigated. Composite mixtures, in which 10, 20, 30, 40 and 50% of ordinary Portland cement (OPC) was replaced by AKV or AKG, were prepared with w/b of 0.5, and exposed to different curing conditions (ordinary curing for 28 days and autoclaving). Factors affecting microstructure were investigated on pastes by X-ray diffraction (XRD), Differential thermal analysis/thermal gravimetry (DTA/TG) analyses, Mercury intrusion porosimetry (MIP) and Scanning electron microscopy with Energy-dispersive spectroscopy (SEM-EDS). AKG composites exhibited higher compressive strengths under both curing conditions. Positive autoclaving effects on strengths were predominantly pronounced at the higher cement replacement levels. Comparison of the autoclaved and ordinary cured paste microstructure, revealed more intensive pozzolanic reaction during autoclaving conditions (CH content near zero) and higher total porosity. The negative effect of hydrogarnet on the strength was compensated by the formation of the crystalline tobermorite. Obtained results revealed that mechanically activated kaolin, with high content of quartz, could be a promising pozzolanic addition, even at high cement replacement levels (30–50%), especially when autoclaving curing conditions were applied. © 2018 Elsevier Ltd",
publisher = "Elsevier",
journal = "Construction and Building Materials",
title = "Compressive strength and microstructure of ordinary cured and autoclaved cement-based composites with mechanically activated kaolins",
pages = "92-101",
volume = "178",
doi = "10.1016/j.conbuildmat.2018.05.144",
url = "https://hdl.handle.net/21.15107/rcub_dais_4512"
}

Ilić, B., Mitrović, A., Miličić, L.,& Zdujić, M.. (2018). Compressive strength and microstructure of ordinary cured and autoclaved cement-based composites with mechanically activated kaolins. in Construction and Building Materials
Elsevier., 178, 92-101.
https://doi.org/10.1016/j.conbuildmat.2018.05.144
https://hdl.handle.net/21.15107/rcub_dais_4512

Ilić B, Mitrović A, Miličić L, Zdujić M. Compressive strength and microstructure of ordinary cured and autoclaved cement-based composites with mechanically activated kaolins. in Construction and Building Materials. 2018;178:92-101.
doi:10.1016/j.conbuildmat.2018.05.144
https://hdl.handle.net/21.15107/rcub_dais_4512 .

Ilić, Biljana, Mitrović, Aleksandra, Miličić, Ljiljana, Zdujić, Miodrag, "Compressive strength and microstructure of ordinary cured and autoclaved cement-based composites with mechanically activated kaolins" in Construction and Building Materials, 178 (2018):92-101,
https://doi.org/10.1016/j.conbuildmat.2018.05.144 .,
https://hdl.handle.net/21.15107/rcub_dais_4512 .

TY  - JOUR
AU  - Ilić, Biljana
AU  - Mitrović, Aleksandra
AU  - Miličić, Ljiljana
AU  - Zdujić, Miodrag
PY  - 2018
UR  - https://dais.sanu.ac.rs/123456789/3700
AB  - The effects of two different mechanically activated kaolins, AKV (61% kaolinite, 14% quartz and 16% mica) and AKG (51.6% kaolinite and 40.6% quartz) on the compressive strength of cement composites and microstructure of pastes were investigated. Composite mixtures, in which 10, 20, 30, 40 and 50% of ordinary Portland cement (OPC) was replaced by AKV or AKG, were prepared with w/b of 0.5, and exposed to different curing conditions (ordinary curing for 28 days and autoclaving). Factors affecting microstructure were investigated on pastes by X-ray diffraction (XRD), Differential thermal analysis/thermal gravimetry (DTA/TG) analyses, Mercury intrusion porosimetry (MIP) and Scanning electron microscopy with Energy-dispersive spectroscopy (SEM-EDS). AKG composites exhibited higher compressive strengths under both curing conditions. Positive autoclaving effects on strengths were predominantly pronounced at the higher cement replacement levels. Comparison of the autoclaved and ordinary cured paste microstructure, revealed more intensive pozzolanic reaction during autoclaving conditions (CH content near zero) and higher total porosity. The negative effect of hydrogarnet on the strength was compensated by the formation of the crystalline tobermorite. Obtained results revealed that mechanically activated kaolin, with high content of quartz, could be a promising pozzolanic addition, even at high cement replacement levels (30–50%), especially when autoclaving curing conditions were applied. © 2018 Elsevier Ltd
PB  - Elsevier
T2  - Construction and Building Materials
T1  - Compressive strength and microstructure of ordinary cured and autoclaved cement-based composites with mechanically activated kaolins
SP  - 92
EP  - 101
VL  - 178
DO  - 10.1016/j.conbuildmat.2018.05.144
UR  - https://hdl.handle.net/21.15107/rcub_dais_3700
ER  - 

@article{
author = "Ilić, Biljana and Mitrović, Aleksandra and Miličić, Ljiljana and Zdujić, Miodrag",
year = "2018",
abstract = "The effects of two different mechanically activated kaolins, AKV (61% kaolinite, 14% quartz and 16% mica) and AKG (51.6% kaolinite and 40.6% quartz) on the compressive strength of cement composites and microstructure of pastes were investigated. Composite mixtures, in which 10, 20, 30, 40 and 50% of ordinary Portland cement (OPC) was replaced by AKV or AKG, were prepared with w/b of 0.5, and exposed to different curing conditions (ordinary curing for 28 days and autoclaving). Factors affecting microstructure were investigated on pastes by X-ray diffraction (XRD), Differential thermal analysis/thermal gravimetry (DTA/TG) analyses, Mercury intrusion porosimetry (MIP) and Scanning electron microscopy with Energy-dispersive spectroscopy (SEM-EDS). AKG composites exhibited higher compressive strengths under both curing conditions. Positive autoclaving effects on strengths were predominantly pronounced at the higher cement replacement levels. Comparison of the autoclaved and ordinary cured paste microstructure, revealed more intensive pozzolanic reaction during autoclaving conditions (CH content near zero) and higher total porosity. The negative effect of hydrogarnet on the strength was compensated by the formation of the crystalline tobermorite. Obtained results revealed that mechanically activated kaolin, with high content of quartz, could be a promising pozzolanic addition, even at high cement replacement levels (30–50%), especially when autoclaving curing conditions were applied. © 2018 Elsevier Ltd",
publisher = "Elsevier",
journal = "Construction and Building Materials",
title = "Compressive strength and microstructure of ordinary cured and autoclaved cement-based composites with mechanically activated kaolins",
pages = "92-101",
volume = "178",
doi = "10.1016/j.conbuildmat.2018.05.144",
url = "https://hdl.handle.net/21.15107/rcub_dais_3700"
}

Ilić, B., Mitrović, A., Miličić, L.,& Zdujić, M.. (2018). Compressive strength and microstructure of ordinary cured and autoclaved cement-based composites with mechanically activated kaolins. in Construction and Building Materials
Elsevier., 178, 92-101.
https://doi.org/10.1016/j.conbuildmat.2018.05.144
https://hdl.handle.net/21.15107/rcub_dais_3700

Ilić B, Mitrović A, Miličić L, Zdujić M. Compressive strength and microstructure of ordinary cured and autoclaved cement-based composites with mechanically activated kaolins. in Construction and Building Materials. 2018;178:92-101.
doi:10.1016/j.conbuildmat.2018.05.144
https://hdl.handle.net/21.15107/rcub_dais_3700 .

Ilić, Biljana, Mitrović, Aleksandra, Miličić, Ljiljana, Zdujić, Miodrag, "Compressive strength and microstructure of ordinary cured and autoclaved cement-based composites with mechanically activated kaolins" in Construction and Building Materials, 178 (2018):92-101,
https://doi.org/10.1016/j.conbuildmat.2018.05.144 .,
https://hdl.handle.net/21.15107/rcub_dais_3700 .

TY  - CONF
AU  - Ilić, Biljana
AU  - Mitrović, Aleksandra
AU  - Radonjanin, Vlastimir
AU  - Malešev, Mirjana
AU  - Zdujić, Miodrag
PY  - 2018
UR  - https://dais.sanu.ac.rs/123456789/2376
AB  - Kaolin from a Serbian deposit, having a high content of mica and quartz, disordered kaolinite and a high specific surface area, was used to prepare metakaolin (MK). The calcination at temperatures of 700 °C or 750 °C for 30 to 180 min resulted in MK having high pozzolanic activity, but also significant aglomeration of particles. In order to disperse aglomerates, MK was milled, which resulted in increased pozzolanic activity and reduced particle size. The effects of MK and additionally milled metakaolin (MKmill) on the composite strengths and microstructure of the pastes were compared. We prepared and investigated composites in which ordinary Portland cement (OPC) was replaced with 10% to 50% of MK or MKmill, as well as the representative samples of paste for determination of microstructure.

Compressive strengths higher than the control were obtained for composites having up to 30% of MK and up to 40% of MKmill, respectively. Increase of composite strengths with MKmill was more pronounced at lower cement replacement levels (10% and 20%).

Compressive strength of composites containing agglomerated MK were satisfactory, which suggests that milling of MK, as well as purification of kaolin, may not be necessary.
PB  - Dordrecht : Springer
C3  - Calcined Clays for Sustainable Concrete: Proceedings of the 2nd International Conference on Calcined Clays for Sustainable Concrete
T1  - Compressive Strength Improvements of Cement-Based Composites Achieved with Additional Milling of Metakaolin
SP  - 212
EP  - 218
DO  - 10.1007/978-94-024-1207-9_34
UR  - https://hdl.handle.net/21.15107/rcub_dais_2376
ER  - 

@conference{
author = "Ilić, Biljana and Mitrović, Aleksandra and Radonjanin, Vlastimir and Malešev, Mirjana and Zdujić, Miodrag",
year = "2018",
abstract = "Kaolin from a Serbian deposit, having a high content of mica and quartz, disordered kaolinite and a high specific surface area, was used to prepare metakaolin (MK). The calcination at temperatures of 700 °C or 750 °C for 30 to 180 min resulted in MK having high pozzolanic activity, but also significant aglomeration of particles. In order to disperse aglomerates, MK was milled, which resulted in increased pozzolanic activity and reduced particle size. The effects of MK and additionally milled metakaolin (MKmill) on the composite strengths and microstructure of the pastes were compared. We prepared and investigated composites in which ordinary Portland cement (OPC) was replaced with 10% to 50% of MK or MKmill, as well as the representative samples of paste for determination of microstructure.

Compressive strengths higher than the control were obtained for composites having up to 30% of MK and up to 40% of MKmill, respectively. Increase of composite strengths with MKmill was more pronounced at lower cement replacement levels (10% and 20%).

Compressive strength of composites containing agglomerated MK were satisfactory, which suggests that milling of MK, as well as purification of kaolin, may not be necessary.",
publisher = "Dordrecht : Springer",
journal = "Calcined Clays for Sustainable Concrete: Proceedings of the 2nd International Conference on Calcined Clays for Sustainable Concrete",
title = "Compressive Strength Improvements of Cement-Based Composites Achieved with Additional Milling of Metakaolin",
pages = "212-218",
doi = "10.1007/978-94-024-1207-9_34",
url = "https://hdl.handle.net/21.15107/rcub_dais_2376"
}

Ilić, B., Mitrović, A., Radonjanin, V., Malešev, M.,& Zdujić, M.. (2018). Compressive Strength Improvements of Cement-Based Composites Achieved with Additional Milling of Metakaolin. in Calcined Clays for Sustainable Concrete: Proceedings of the 2nd International Conference on Calcined Clays for Sustainable Concrete
Dordrecht : Springer., 212-218.
https://doi.org/10.1007/978-94-024-1207-9_34
https://hdl.handle.net/21.15107/rcub_dais_2376

Ilić B, Mitrović A, Radonjanin V, Malešev M, Zdujić M. Compressive Strength Improvements of Cement-Based Composites Achieved with Additional Milling of Metakaolin. in Calcined Clays for Sustainable Concrete: Proceedings of the 2nd International Conference on Calcined Clays for Sustainable Concrete. 2018;:212-218.
doi:10.1007/978-94-024-1207-9_34
https://hdl.handle.net/21.15107/rcub_dais_2376 .

Ilić, Biljana, Mitrović, Aleksandra, Radonjanin, Vlastimir, Malešev, Mirjana, Zdujić, Miodrag, "Compressive Strength Improvements of Cement-Based Composites Achieved with Additional Milling of Metakaolin" in Calcined Clays for Sustainable Concrete: Proceedings of the 2nd International Conference on Calcined Clays for Sustainable Concrete (2018):212-218,
https://doi.org/10.1007/978-94-024-1207-9_34 .,
https://hdl.handle.net/21.15107/rcub_dais_2376 .

TY  - CONF
AU  - Ilić, Biljana
AU  - Radonjanin, Vlastimir
AU  - Malešev, Mirjana
AU  - Zdujić, Miodrag
AU  - Mitrović, Aleksandra
PY  - 2018
UR  - https://dais.sanu.ac.rs/123456789/2375
AB  - Environmental concerns and sustainable development require increased replacement of cement. Most of previous studies have shown that the compressive strength of cement-based composites is maximized with a 20% content of metakaolin. We investigated composites prepared by replacing ordinary Portland Cement (OPC) with 30 to 50% of metakaolin (MK) and addition of appropriate amount of hydrated lime, which were ordinary cured for 2, 28 or 90 days. Hydration products and microstructure of the pastes were determined by X-ray diffraction (XRD), differential thermal analysis/thermal gravimetry (DTA/TG) and mercury intrusion porosimetry (MIP). MK was produced by calcination of kaolin from a Serbian deposit, which contained a high level of impurities.

Replacement of OPC with 30% of MK achieved 28 days compressive strength equivalent to that of the control mix. Higher replacement levels, 40% and 50%, combined with the addition of hydrated lime, achieved satisfactory relative strengths of 94% and 87%, respectively. The positive contribution was particularly pronounced after 90 days for a composite containing 50% of MK. The results clearly showed a possibility of obtaining composites having acceptable compressive strength with reduced cement content in accordance with environmental and sustained development requirements.
PB  - Dordrecht : Springer
C3  - Calcined Clays for Sustainable Concrete: Proceedings of the 2nd International Conference on Calcined Clays for Sustainable Concrete
T1  - Properties of the cement-based composites with high content of metakaolin
DO  - 10.1007/978-94-024-1207-9_35
UR  - https://hdl.handle.net/21.15107/rcub_dais_2375
ER  - 

@conference{
author = "Ilić, Biljana and Radonjanin, Vlastimir and Malešev, Mirjana and Zdujić, Miodrag and Mitrović, Aleksandra",
year = "2018",
abstract = "Environmental concerns and sustainable development require increased replacement of cement. Most of previous studies have shown that the compressive strength of cement-based composites is maximized with a 20% content of metakaolin. We investigated composites prepared by replacing ordinary Portland Cement (OPC) with 30 to 50% of metakaolin (MK) and addition of appropriate amount of hydrated lime, which were ordinary cured for 2, 28 or 90 days. Hydration products and microstructure of the pastes were determined by X-ray diffraction (XRD), differential thermal analysis/thermal gravimetry (DTA/TG) and mercury intrusion porosimetry (MIP). MK was produced by calcination of kaolin from a Serbian deposit, which contained a high level of impurities.

Replacement of OPC with 30% of MK achieved 28 days compressive strength equivalent to that of the control mix. Higher replacement levels, 40% and 50%, combined with the addition of hydrated lime, achieved satisfactory relative strengths of 94% and 87%, respectively. The positive contribution was particularly pronounced after 90 days for a composite containing 50% of MK. The results clearly showed a possibility of obtaining composites having acceptable compressive strength with reduced cement content in accordance with environmental and sustained development requirements.",
publisher = "Dordrecht : Springer",
journal = "Calcined Clays for Sustainable Concrete: Proceedings of the 2nd International Conference on Calcined Clays for Sustainable Concrete",
title = "Properties of the cement-based composites with high content of metakaolin",
doi = "10.1007/978-94-024-1207-9_35",
url = "https://hdl.handle.net/21.15107/rcub_dais_2375"
}

Ilić, B., Radonjanin, V., Malešev, M., Zdujić, M.,& Mitrović, A.. (2018). Properties of the cement-based composites with high content of metakaolin. in Calcined Clays for Sustainable Concrete: Proceedings of the 2nd International Conference on Calcined Clays for Sustainable Concrete
Dordrecht : Springer..
https://doi.org/10.1007/978-94-024-1207-9_35
https://hdl.handle.net/21.15107/rcub_dais_2375

Ilić B, Radonjanin V, Malešev M, Zdujić M, Mitrović A. Properties of the cement-based composites with high content of metakaolin. in Calcined Clays for Sustainable Concrete: Proceedings of the 2nd International Conference on Calcined Clays for Sustainable Concrete. 2018;.
doi:10.1007/978-94-024-1207-9_35
https://hdl.handle.net/21.15107/rcub_dais_2375 .

Ilić, Biljana, Radonjanin, Vlastimir, Malešev, Mirjana, Zdujić, Miodrag, Mitrović, Aleksandra, "Properties of the cement-based composites with high content of metakaolin" in Calcined Clays for Sustainable Concrete: Proceedings of the 2nd International Conference on Calcined Clays for Sustainable Concrete (2018),
https://doi.org/10.1007/978-94-024-1207-9_35 .,
https://hdl.handle.net/21.15107/rcub_dais_2375 .

TY  - JOUR
AU  - Troter, Dragan Z.
AU  - Todorović, Zoran B.
AU  - Stojanović, Đokić
AU  - Đokić Stojanović, Dušica R.
AU  - Veselinović, Ljiljana
AU  - Zdujić, Miodrag
AU  - Veljković, Vlada B.
PY  - 2018
UR  - https://dais.sanu.ac.rs/123456789/3802
AB  - Choline chloride (ChCl)-based deep eutectic solvents (DESs) with different amides or polyols as hydrogen bond donors were tested as cosolvents in the ethanolysis of expired sunflower oil catalyzed by either calcined or non-calcined CaO. These cosolvents promoted the ethanolysis by a successful activation of non-calcined CaO, which was ascribed to the CaCO3 and Ca(OH)2 dissolution from the surface of the solid catalyst particles. With both calcined and non-calcined CaO, the polyol-based solvents gave higher fatty acid ethyl esters (FAEE) content than the amide-based solvents. Among the amide-based DESs, choline chloride:urea (ChCl:U) was the most efficient activator of non-calcined CaO. Choline chloride:ethylene glycol (ChCl:EG) and choline chloride:propylene glycol (ChCl:PG) were more efficient than choline chloride:glycerol (ChCl:G) even with non-calcined CaO. However, ChCl:G might be more suitable than the others since the use of glycerol, a by-product of the ethanolysis, could reduce the overall biodiesel production costs. FTIR and XRD analyses of the used and separated CaO were performed in order to get more insight into the catalytically active phase(s). Also, the mechanisms of the CaO activation in the presence of the DESs were considered. The phase separation of the reaction mixture was faster in the presence of the DESs. Since ChCl:U and ChCl:G DESs are nontoxic, biodegradable, biorenewable and “green” solvents and provide the elimination of the calcination step of CaO, thus reducing the overall process costs, the non-calcined CaO catalytic systems with these DESs are recommended for further optimization. © 2018 Elsevier B.V.
T2  - Journal of Molecular Liquids
T1  - Choline chloride-based deep eutectic solvents in CaO-catalyzed ethanolysis of expired sunflower oil
SP  - 557
EP  - 567
VL  - 266
DO  - 10.1016/j.molliq.2018.06.106
UR  - https://hdl.handle.net/21.15107/rcub_dais_3802
ER  - 

@article{
author = "Troter, Dragan Z. and Todorović, Zoran B. and Stojanović, Đokić and Đokić Stojanović, Dušica R. and Veselinović, Ljiljana and Zdujić, Miodrag and Veljković, Vlada B.",
year = "2018",
abstract = "Choline chloride (ChCl)-based deep eutectic solvents (DESs) with different amides or polyols as hydrogen bond donors were tested as cosolvents in the ethanolysis of expired sunflower oil catalyzed by either calcined or non-calcined CaO. These cosolvents promoted the ethanolysis by a successful activation of non-calcined CaO, which was ascribed to the CaCO3 and Ca(OH)2 dissolution from the surface of the solid catalyst particles. With both calcined and non-calcined CaO, the polyol-based solvents gave higher fatty acid ethyl esters (FAEE) content than the amide-based solvents. Among the amide-based DESs, choline chloride:urea (ChCl:U) was the most efficient activator of non-calcined CaO. Choline chloride:ethylene glycol (ChCl:EG) and choline chloride:propylene glycol (ChCl:PG) were more efficient than choline chloride:glycerol (ChCl:G) even with non-calcined CaO. However, ChCl:G might be more suitable than the others since the use of glycerol, a by-product of the ethanolysis, could reduce the overall biodiesel production costs. FTIR and XRD analyses of the used and separated CaO were performed in order to get more insight into the catalytically active phase(s). Also, the mechanisms of the CaO activation in the presence of the DESs were considered. The phase separation of the reaction mixture was faster in the presence of the DESs. Since ChCl:U and ChCl:G DESs are nontoxic, biodegradable, biorenewable and “green” solvents and provide the elimination of the calcination step of CaO, thus reducing the overall process costs, the non-calcined CaO catalytic systems with these DESs are recommended for further optimization. © 2018 Elsevier B.V.",
journal = "Journal of Molecular Liquids",
title = "Choline chloride-based deep eutectic solvents in CaO-catalyzed ethanolysis of expired sunflower oil",
pages = "557-567",
volume = "266",
doi = "10.1016/j.molliq.2018.06.106",
url = "https://hdl.handle.net/21.15107/rcub_dais_3802"
}

Troter, D. Z., Todorović, Z. B., Stojanović, Đ., Đokić Stojanović, D. R., Veselinović, L., Zdujić, M.,& Veljković, V. B.. (2018). Choline chloride-based deep eutectic solvents in CaO-catalyzed ethanolysis of expired sunflower oil. in Journal of Molecular Liquids, 266, 557-567.
https://doi.org/10.1016/j.molliq.2018.06.106
https://hdl.handle.net/21.15107/rcub_dais_3802

Troter DZ, Todorović ZB, Stojanović Đ, Đokić Stojanović DR, Veselinović L, Zdujić M, Veljković VB. Choline chloride-based deep eutectic solvents in CaO-catalyzed ethanolysis of expired sunflower oil. in Journal of Molecular Liquids. 2018;266:557-567.
doi:10.1016/j.molliq.2018.06.106
https://hdl.handle.net/21.15107/rcub_dais_3802 .

Troter, Dragan Z., Todorović, Zoran B., Stojanović, Đokić, Đokić Stojanović, Dušica R., Veselinović, Ljiljana, Zdujić, Miodrag, Veljković, Vlada B., "Choline chloride-based deep eutectic solvents in CaO-catalyzed ethanolysis of expired sunflower oil" in Journal of Molecular Liquids, 266 (2018):557-567,
https://doi.org/10.1016/j.molliq.2018.06.106 .,
https://hdl.handle.net/21.15107/rcub_dais_3802 .

TY  - JOUR
AU  - Troter, Dragan Z.
AU  - Todorović, Zoran B.
AU  - Đokić Stojanović, Dušica R.
AU  - Veselinović, Ljiljana
AU  - Zdujić, Miodrag
AU  - Veljković, Vlada B.
PY  - 2018
UR  - https://dais.sanu.ac.rs/123456789/3694
AB  - Choline chloride (ChCl)-based deep eutectic solvents (DESs) with different amides or polyols as hydrogen bond donors were tested as cosolvents in the ethanolysis of expired sunflower oil catalyzed by either calcined or non-calcined CaO. These cosolvents promoted the ethanolysis by a successful activation of non-calcined CaO, which was ascribed to the CaCO3 and Ca(OH)2 dissolution from the surface of the solid catalyst particles. With both calcined and non-calcined CaO, the polyol-based solvents gave higher fatty acid ethyl esters (FAEE) content than the amide-based solvents. Among the amide-based DESs, choline chloride:urea (ChCl:U) was the most efficient activator of non-calcined CaO. Choline chloride:ethylene glycol (ChCl:EG) and choline chloride:propylene glycol (ChCl:PG) were more efficient than choline chloride:glycerol (ChCl:G) even with non-calcined CaO. However, ChCl:G might be more suitable than the others since the use of glycerol, a by-product of the ethanolysis, could reduce the overall biodiesel production costs. FTIR and XRD analyses of the used and separated CaO were performed in order to get more insight into the catalytically active phase(s). Also, the mechanisms of the CaO activation in the presence of the DESs were considered. The phase separation of the reaction mixture was faster in the presence of the DESs. Since ChCl:U and ChCl:G DESs are nontoxic, biodegradable, biorenewable and “green” solvents and provide the elimination of the calcination step of CaO, thus reducing the overall process costs, the non-calcined CaO catalytic systems with these DESs are recommended for further optimization. © 2018 Elsevier B.V.
PB  - Elsevier
T2  - Journal of Molecular Liquids
T1  - Choline chloride-based deep eutectic solvents in CaO-catalyzed ethanolysis of expired sunflower oil
SP  - 557
EP  - 567
VL  - 266
DO  - 10.1016/j.molliq.2018.06.106
UR  - https://hdl.handle.net/21.15107/rcub_dais_3694
ER  - 

@article{
author = "Troter, Dragan Z. and Todorović, Zoran B. and Đokić Stojanović, Dušica R. and Veselinović, Ljiljana and Zdujić, Miodrag and Veljković, Vlada B.",
year = "2018",
abstract = "Choline chloride (ChCl)-based deep eutectic solvents (DESs) with different amides or polyols as hydrogen bond donors were tested as cosolvents in the ethanolysis of expired sunflower oil catalyzed by either calcined or non-calcined CaO. These cosolvents promoted the ethanolysis by a successful activation of non-calcined CaO, which was ascribed to the CaCO3 and Ca(OH)2 dissolution from the surface of the solid catalyst particles. With both calcined and non-calcined CaO, the polyol-based solvents gave higher fatty acid ethyl esters (FAEE) content than the amide-based solvents. Among the amide-based DESs, choline chloride:urea (ChCl:U) was the most efficient activator of non-calcined CaO. Choline chloride:ethylene glycol (ChCl:EG) and choline chloride:propylene glycol (ChCl:PG) were more efficient than choline chloride:glycerol (ChCl:G) even with non-calcined CaO. However, ChCl:G might be more suitable than the others since the use of glycerol, a by-product of the ethanolysis, could reduce the overall biodiesel production costs. FTIR and XRD analyses of the used and separated CaO were performed in order to get more insight into the catalytically active phase(s). Also, the mechanisms of the CaO activation in the presence of the DESs were considered. The phase separation of the reaction mixture was faster in the presence of the DESs. Since ChCl:U and ChCl:G DESs are nontoxic, biodegradable, biorenewable and “green” solvents and provide the elimination of the calcination step of CaO, thus reducing the overall process costs, the non-calcined CaO catalytic systems with these DESs are recommended for further optimization. © 2018 Elsevier B.V.",
publisher = "Elsevier",
journal = "Journal of Molecular Liquids",
title = "Choline chloride-based deep eutectic solvents in CaO-catalyzed ethanolysis of expired sunflower oil",
pages = "557-567",
volume = "266",
doi = "10.1016/j.molliq.2018.06.106",
url = "https://hdl.handle.net/21.15107/rcub_dais_3694"
}

Troter, D. Z., Todorović, Z. B., Đokić Stojanović, D. R., Veselinović, L., Zdujić, M.,& Veljković, V. B.. (2018). Choline chloride-based deep eutectic solvents in CaO-catalyzed ethanolysis of expired sunflower oil. in Journal of Molecular Liquids
Elsevier., 266, 557-567.
https://doi.org/10.1016/j.molliq.2018.06.106
https://hdl.handle.net/21.15107/rcub_dais_3694

Troter DZ, Todorović ZB, Đokić Stojanović DR, Veselinović L, Zdujić M, Veljković VB. Choline chloride-based deep eutectic solvents in CaO-catalyzed ethanolysis of expired sunflower oil. in Journal of Molecular Liquids. 2018;266:557-567.
doi:10.1016/j.molliq.2018.06.106
https://hdl.handle.net/21.15107/rcub_dais_3694 .

Troter, Dragan Z., Todorović, Zoran B., Đokić Stojanović, Dušica R., Veselinović, Ljiljana, Zdujić, Miodrag, Veljković, Vlada B., "Choline chloride-based deep eutectic solvents in CaO-catalyzed ethanolysis of expired sunflower oil" in Journal of Molecular Liquids, 266 (2018):557-567,
https://doi.org/10.1016/j.molliq.2018.06.106 .,
https://hdl.handle.net/21.15107/rcub_dais_3694 .