FABRICATION OF Mg-Al HYDROTALCITE SUPPORTED γ¬-Al2O3 AS CATALYST FOR BIODIESEL SYNTHESIS FROM WASTE COOKING OIL
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Keywords:
γ-Al2O3
biodiesel synthesis
hydrotalcite catalysts
mesoporous material
transesterification
Abstract
Integration of Mg-Al hydrotalcite on the surface and in the pores of γ-Al2O3 obtains a solid base catalyst with large surface area containing strong base sites, which is HtMg-Al/γ-Al2O3. Thermogravimetry-Differential thermal analysis shows that decomposition temperature of Ht Mg-Al/γ-Al2O3 is 470oC, while that of hydrotanxit Mg-Al is 364oC. This proves HtMg-Al/γ-Al2O3 has more efficient structure and thermal stability than the Mg-Al hidrotalcite. HtMg-Al/γ-Al2O3 could be used as a good catalyst for transesterification of waste cooking oil with free fatty acid level of 7.6, at which the base sites can catalyst not only transesterification of triglyceride, but also decarboxylation of free fatty acids. The transesterification between methanol and waste cooking is carried out at 120oC for 4 hours. The reaction efficiency is about 98.4%. The catalyst is reused for 10 times without change of the reaction efficiency.
References
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Published
May 31, 2017
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How to Cite
Ngo Minh Duc. “FABRICATION OF Mg-Al HYDROTALCITE SUPPORTED γ¬-Al2O3 AS CATALYST FOR BIODIESEL SYNTHESIS FROM WASTE COOKING OIL”. The University of Danang - Journal of Science and Technology, vol. 5, no. 114.1, May 2017, pp. 32-36, https://jst-ud.vn/jst-ud/article/view/3075.
