Journal
RENEWABLE ENERGY
Volume 146, Issue -, Pages 1242-1248Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.renene.2019.06.171
Keywords
Biodiesel; Transesterification; Ca-Mg-Al; Catalyst; Vegetable oil; Hydrotalcite
Funding
- Agence Universitaire de la Francophonie (AUF) Region du Moyen-Orient, Lebanon
- Lebanese CNRS
- ARCUS E2D2 project
- French Ministry of Foreign Affairs
- Region Nord-Pas de Calais, France
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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, N-2 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 degrees 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 degrees C giving a final FAME yield of 95%. (C) 2019 Elsevier Ltd. All rights reserved.
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