Optimization of CaO-catalyzed sunflower oil methanolysis with crude biodiesel as a cosolvent
AuthorsTodorović, Zoran B.
Troter, Dragan Z.
Đokić Stojanović, Dušica R.
Veličković, Ana V.
Avramović, Jelena M.
Stamenković, Olivera S.
Veljković, Vlada B.
Article (Accepted Version)
MetadataShow full item record
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 sec...ond recycling reaction provided the highest FAME content of 97.7% after 5 h.
Keywords:biodiesel / calcium leaching / CaO / cosolvent / methanolysis / recycling
Source:Fuel, 2019, 237, 903-910
- This is the peer-reviewed version of 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.
- Supplementary material: http://dais.sanu.ac.rs/123456789/4071
- Published version: http://dais.sanu.ac.rs/123456789/4070