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Title: Biodiesel production from refined sunflower oil over Ca-Mg-Al catalysts: effect of the composition and the thermal treatment
Authors: Dahdah, Eliane
Estephane, Jane 
Haydar, Reem
Youssef, Yara
Khoury, Bilal El 
Gennequin, Cédric
Affiliations: Department of Chemical Engineering 
Department of Chemistry 
Keywords: Ca-Mg-Al
Vegetable oil
Subjects: Biodiesel
Issue Date: 2020
Part of: Journal of renewable energy
Volume: 146
Start page: 1242
End page: 1248
Different Ca–Mg–Al catalysts were prepared by the hydrotalcite route using co-precipitation and impregnation techniques. The effect of thermal treatment was studied and the obtained mixed oxides were characterized by X-ray diffraction, N2 adsorption-desorption and CO2-temperature programmed desorption. Catalysts were then tested in the transesterification of sunflower oil. The catalyst that showed the best catalytic performance was an uncalcined Mg4Al2 support impregnated with 40 wt% of calcium followed by a calcination at 600 °C (Ca600/Mg4Al2HT). Optimum conditions for biodiesel production over this catalyst were a reaction time of 6 h, a catalyst to oil ratio of 2.5 wt%, a 15:1 methanol to oil molar ratio, a stirring rate of 400 rpm and a temperature of 60 °C giving a final FAME yield of 95%.
DOI: 10.1016/j.renene.2019.06.171
Ezproxy URL: Link to full text
Type: Journal Article
Appears in Collections:Department of Chemical Engineering

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