Synthesis of Cerium Oxide by Colloidal Emulsion Aphrons (CEAs) Method for Biodiesel Production

Wasinee Amesuwan; Somnuk Jarudilokkul

Authors

Wasinee Amesuwan Department of Chemical Engineering, Faculty of Engineering, King Mongkut's University of Technology Thonburi, Bangkok, Thailand
Somnuk Jarudilokkul Department of Chemical Engineering, Faculty of Engineering, King Mongkut's University of Technology Thonburi, Bangkok, Thailand

Keywords:

Biodiesel, Cerium Oxide, Heterogeneous Catalyst, Transesterification

Abstract

This study investigated the use of barium hydroxide doped ceria (Ba(OH)2–CeO₂) as solid based catalyst for the transesterification of palm oil with methanol to produce biodiesel. Cerium oxide was prepared by colloidal emulsion aphrons (CEAs), a type of dispersion method, which was then followed by calcination. The catalyst was evaluated for its activity in terms of the content of fatty acid methyl ester (%FAME). Moreover, the dependence of the %FAME on the reaction parameters, which included the amount of catalyst and reaction time, was studied. Physicochemical characteristics of the catalyst, as revealed by X-ray diffraction, Brunauer-Emmett-Teller analysis, scanning electron microscopy and differential thermal analysis/thermogravimetry, were also examined. The maximum methyl ester content was noted to be 94.65%. The optimal reaction condition for the transesterification was the use of 30:1 molar ratio of methanol to oil, with an addition of 8 wt.% Ba(OH)₂-CeO₂ catalyst and reaction time of 4 h.

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