Catalytic Efficiency of Calcium Oxide Catalyst doped with Magnesium in Biodiesel Transesterification from Recycled Cooking Oil

• Published in: IOP conference series. Earth and environmental science 2024-12, Vol.1432 (1), p.12010
• Main Authors: Zulkurnain, Nursyamimi, Fathiah Ahmad, Aisyah, Jamal Mat Rosid, Salmiah, Azid, Azman, Toemen, Susilawati, Nazwanie Wan Abdullah, Wan, Mat Rosid, Sarina
• Format: Article
• Language: English
• Subjects: Alternative fuels; Aluminum oxide; biodiesel; Biodiesel fuels; Biofuels; Calcium; Calcium carbonate; Calcium oxide; calcium-based catalyst; Catalysts; Chemical synthesis; Cooking; Cooking oils; Diesel; Lime; Magnesium; Oils & fats; Optimization; Reaction time; recycled cooking oil; Roasting; Transesterification
• ISSN: 1755-1307; 1755-1315
• DOI: 10.1088/1755-1315/1432/1/012010

The rising demand for alternative fuels due to the depletion of diesel oil has accelerated biodiesel production, primarily synthesized through base-catalyzed transesterification. In this study, recycled cooking oil was used as the feedstock, with an alumina-supported calcium oxide catalyst doped with magnesium (Ca/Mg/Al 2 O 3 ), synthesized via the wet impregnation method, serving as the heterogeneous base catalyst. The catalyst optimization involved adjusting calcination temperatures, the dopant-to-base ratio, and reaction times. The optimal conditions were attained with a 10% Mg loading, calcined at 800°C, and a reaction time of one hour. Under these parameters, biodiesel yield reached 48.30%. XRD analysis revealed CaCO 3 and MgAl 2 O 4 as the active species on the catalyst surface, while FESEM analysis showed the catalyst’s irregular shape and particle aggregation, contributing to the yield. These findings suggest that the Ca/Mg (90:10)/Al 2 O 3 catalyst is a promising heterogeneous base catalyst with significant potential for biodiesel production.