H2SO4/CaO-Catalyzed Process for Biodiesel Production from High Acid Value Jatropha curcas Crude Oil
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概要
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Transesterification is affected by the free fatty acid (FFA) content of vegetable oils or animal fats. A two-step H2SO4/CaO-catalyzed methanolysis process was used for the efficient conversion of Jatropha curcas crude oil, which has an acid value greater than 30 mg KOH/g, into fatty acid methyl ester (FAME). The effects of H2SO4 catalyst addition, of FFA, and of the water produced as a by-product were investigated. Maximum esterification activity of the initial FFA content was obtained with 0.5-1.2 wt% H2SO4 relative to Jatropha crude oil. The esterification product was used as the substrate for a second, CaO-catalyzed, transesterification. Water usually has an adverse effect on transesterification; however, this study proves that the effect of water is negligible. Using this two-step methanolysis reaction, a FAME level greater than 96% could be obtained in the final product.
著者
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KANEKI Yuichi
Field Technology Laboratory Inc.
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Tsuchiya Yooko
Environmental Science Research Laboratory Central Research Institute Of Electric Power Industry
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YAMAKOSHI Yukiyasu
Department of Environmental Energy, Hokkaido Industrial Research Institute
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