TY  - JOUR
AU  - Todorović, Zoran
AU  - Đorđević, Biljana
AU  - Troter, Dragan
AU  - Veselinović, Ljiljana
AU  - Zdujić, Miodrag
AU  - Veljković, Vlada
PY  - 2023
UR  - https://dais.sanu.ac.rs/123456789/15139
AB  - Deep eutectic solvents (DESs) are called 'designer solvents' due to various structural variations and the benefit of tailoring their physicochemical properties. For industrial applications of DESs it is crucial to know their physical and thermodynamic properties such as density, viscosity, and refractive index. These properties were measured for three lecithin (LEC)-based DESs with glycerol (G), triethanolamine (TEOA), and oleic acid (OLA) as functions of temperature. The viscosity was fitted by both Arrhenius-type and Vogel-Tamman-Fulcher equations. The density, viscosity, and refractive index of tested DESs decreased with the increase in temperature. The LEC:G DES exhibited the lowest density at all tested tempe-ratures. This DES was selected as a cosolvent in the ethanolysis of cold-pressed black mustard (Brassica nigra L.) seed oil catalyzed by either calcined or non-calcined CaO. The reaction was carried out in a batch stirred reactor under the following conditions: the temperature of 70 °C, the ethanol-to-oil molar ratio of 12:1, and the amount of DES and CaO of 20 and 10 wt.% (to oil), respectively. The presence of DES accelerated the reaction, while the separation of the final reaction mixture phases was faster.
PB  - Belgrade : Association of the Chemical Engineers of Serbia
T2  - Hemijska industrija
T1  - Effects of temperature on physicochemical properties of the lecithin based deep eutectic solvents and their use in the CaO-catalyzed transesterification
SP  - 53
EP  - 67
VL  - 77
IS  - 1
DO  - 10.2298/HEMIND220527016T
UR  - https://hdl.handle.net/21.15107/rcub_dais_15139
ER  - 

@article{
author = "Todorović, Zoran and Đorđević, Biljana and Troter, Dragan and Veselinović, Ljiljana and Zdujić, Miodrag and Veljković, Vlada",
year = "2023",
abstract = "Deep eutectic solvents (DESs) are called 'designer solvents' due to various structural variations and the benefit of tailoring their physicochemical properties. For industrial applications of DESs it is crucial to know their physical and thermodynamic properties such as density, viscosity, and refractive index. These properties were measured for three lecithin (LEC)-based DESs with glycerol (G), triethanolamine (TEOA), and oleic acid (OLA) as functions of temperature. The viscosity was fitted by both Arrhenius-type and Vogel-Tamman-Fulcher equations. The density, viscosity, and refractive index of tested DESs decreased with the increase in temperature. The LEC:G DES exhibited the lowest density at all tested tempe-ratures. This DES was selected as a cosolvent in the ethanolysis of cold-pressed black mustard (Brassica nigra L.) seed oil catalyzed by either calcined or non-calcined CaO. The reaction was carried out in a batch stirred reactor under the following conditions: the temperature of 70 °C, the ethanol-to-oil molar ratio of 12:1, and the amount of DES and CaO of 20 and 10 wt.% (to oil), respectively. The presence of DES accelerated the reaction, while the separation of the final reaction mixture phases was faster.",
publisher = "Belgrade : Association of the Chemical Engineers of Serbia",
journal = "Hemijska industrija",
title = "Effects of temperature on physicochemical properties of the lecithin based deep eutectic solvents and their use in the CaO-catalyzed transesterification",
pages = "53-67",
volume = "77",
number = "1",
doi = "10.2298/HEMIND220527016T",
url = "https://hdl.handle.net/21.15107/rcub_dais_15139"
}

Todorović, Z., Đorđević, B., Troter, D., Veselinović, L., Zdujić, M.,& Veljković, V.. (2023). Effects of temperature on physicochemical properties of the lecithin based deep eutectic solvents and their use in the CaO-catalyzed transesterification. in Hemijska industrija
Belgrade : Association of the Chemical Engineers of Serbia., 77(1), 53-67.
https://doi.org/10.2298/HEMIND220527016T
https://hdl.handle.net/21.15107/rcub_dais_15139

Todorović Z, Đorđević B, Troter D, Veselinović L, Zdujić M, Veljković V. Effects of temperature on physicochemical properties of the lecithin based deep eutectic solvents and their use in the CaO-catalyzed transesterification. in Hemijska industrija. 2023;77(1):53-67.
doi:10.2298/HEMIND220527016T
https://hdl.handle.net/21.15107/rcub_dais_15139 .

Todorović, Zoran, Đorđević, Biljana, Troter, Dragan, Veselinović, Ljiljana, Zdujić, Miodrag, Veljković, Vlada, "Effects of temperature on physicochemical properties of the lecithin based deep eutectic solvents and their use in the CaO-catalyzed transesterification" in Hemijska industrija, 77, no. 1 (2023):53-67,
https://doi.org/10.2298/HEMIND220527016T .,
https://hdl.handle.net/21.15107/rcub_dais_15139 .

TY  - CONF
AU  - Đorđević, Biljana
AU  - Kostić, Milan
AU  - Todorović, Zoran
AU  - Stamenković, Olivera
AU  - Veselinović, Ljiljana
AU  - Veljković, Vlada B.
PY  - 2022
UR  - https://dais.sanu.ac.rs/123456789/13604
AB  - Black mustard (Brassica nigra L.) seeds oil (BMSO), characterized by a high content of erucic acid (C22:1), belongs to inedible oils. Since BMSO has a high percentage of monounsaturated and branched fatty acids, it is a suitable raw material for biodiesel production. Also, green cosolvents, like deep eutectic solvents (DESs), can improve the biodiesel production process. This study reports the influence of the triethanolamine:choline chloride DES (2:1 mol/mol) on the BMSO ethanolysis over calcined CaO as a catalyst, under the following reaction conditions: temperature of 50, 60, and 70 ºC, ethanol-to-oil molar ratio of 12:1, as well as TEOA:ChCl DES and calcined CaO content of 20% and 10%, respectively. At 70 ºC, the ChCl:TEOA DES provided a high content of fatty acid ethyl esters (FAEE) (98.46±0.7%) after 1.5 min, compared to the control reaction (without the presence of DES), where the maximum FAEE content (98.05±0.6%) was achieved within 4 h. BMSO ethanolysis was described by the kinetic model of the pseudo-first order and the model of variable reaction order concerning TAG and the autocatalytic behavior of the ethanolysis reaction. Both kinetic models, with great accuracy, fitted the experimental data. As a result, physicochemical properties of the obtained biodiesel were within the limit values prescribed by the quality standard EN 14214. Also, the reusability of calcined CaO was proven even in four cycles with the FAEE content of over 90%.
PB  - Novi Sad : University of Novi Sad, Faculty of Technology
C3  - Book of abstracts / 2nd International Conference on Advanced Production and Processing, 20th-22nd October 2022, Novi Sad
T1  - A triethanolamine:choline chloride deep eutectic solvent as a cosolvent in the ethanolysis of Brassica nigra L. seed oil
SP  - 206
EP  - 206
UR  - https://hdl.handle.net/21.15107/rcub_dais_13604
ER  - 

@conference{
author = "Đorđević, Biljana and Kostić, Milan and Todorović, Zoran and Stamenković, Olivera and Veselinović, Ljiljana and Veljković, Vlada B.",
year = "2022",
abstract = "Black mustard (Brassica nigra L.) seeds oil (BMSO), characterized by a high content of erucic acid (C22:1), belongs to inedible oils. Since BMSO has a high percentage of monounsaturated and branched fatty acids, it is a suitable raw material for biodiesel production. Also, green cosolvents, like deep eutectic solvents (DESs), can improve the biodiesel production process. This study reports the influence of the triethanolamine:choline chloride DES (2:1 mol/mol) on the BMSO ethanolysis over calcined CaO as a catalyst, under the following reaction conditions: temperature of 50, 60, and 70 ºC, ethanol-to-oil molar ratio of 12:1, as well as TEOA:ChCl DES and calcined CaO content of 20% and 10%, respectively. At 70 ºC, the ChCl:TEOA DES provided a high content of fatty acid ethyl esters (FAEE) (98.46±0.7%) after 1.5 min, compared to the control reaction (without the presence of DES), where the maximum FAEE content (98.05±0.6%) was achieved within 4 h. BMSO ethanolysis was described by the kinetic model of the pseudo-first order and the model of variable reaction order concerning TAG and the autocatalytic behavior of the ethanolysis reaction. Both kinetic models, with great accuracy, fitted the experimental data. As a result, physicochemical properties of the obtained biodiesel were within the limit values prescribed by the quality standard EN 14214. Also, the reusability of calcined CaO was proven even in four cycles with the FAEE content of over 90%.",
publisher = "Novi Sad : University of Novi Sad, Faculty of Technology",
journal = "Book of abstracts / 2nd International Conference on Advanced Production and Processing, 20th-22nd October 2022, Novi Sad",
title = "A triethanolamine:choline chloride deep eutectic solvent as a cosolvent in the ethanolysis of Brassica nigra L. seed oil",
pages = "206-206",
url = "https://hdl.handle.net/21.15107/rcub_dais_13604"
}

Đorđević, B., Kostić, M., Todorović, Z., Stamenković, O., Veselinović, L.,& Veljković, V. B.. (2022). A triethanolamine:choline chloride deep eutectic solvent as a cosolvent in the ethanolysis of Brassica nigra L. seed oil. in Book of abstracts / 2nd International Conference on Advanced Production and Processing, 20th-22nd October 2022, Novi Sad
Novi Sad : University of Novi Sad, Faculty of Technology., 206-206.
https://hdl.handle.net/21.15107/rcub_dais_13604

Đorđević B, Kostić M, Todorović Z, Stamenković O, Veselinović L, Veljković VB. A triethanolamine:choline chloride deep eutectic solvent as a cosolvent in the ethanolysis of Brassica nigra L. seed oil. in Book of abstracts / 2nd International Conference on Advanced Production and Processing, 20th-22nd October 2022, Novi Sad. 2022;:206-206.
https://hdl.handle.net/21.15107/rcub_dais_13604 .

Đorđević, Biljana, Kostić, Milan, Todorović, Zoran, Stamenković, Olivera, Veselinović, Ljiljana, Veljković, Vlada B., "A triethanolamine:choline chloride deep eutectic solvent as a cosolvent in the ethanolysis of Brassica nigra L. seed oil" in Book of abstracts / 2nd International Conference on Advanced Production and Processing, 20th-22nd October 2022, Novi Sad (2022):206-206,
https://hdl.handle.net/21.15107/rcub_dais_13604 .