Lipase-catalyzed transesterification of soybean oil for biodiesel production in <Emphasis Type="Italic">tert</Emphasis>-amyl alcohol |
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Authors: | Yan Zheng Jing Quan Xin Ning Li-Min Zhu Bo Jiang Zhi-Yan He |
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Institution: | (1) College of Chemistry, Chemical Engineering and Biotechnology, Donghua University, 2999 North Renmin Road, Songjiang University City, Shanghai, 201620, People’s Republic of China;(2) Kimberly-Clark (China) Co., Ltd, Shanghai, 200001, People’s Republic of China |
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Abstract: | Lipase-catalyzed transesterification of soybean oil and methanol for biodiesel production in tert-amyl alcohol was investigated. The effects of different organic medium, molar ratio of substrate, reaction temperature, agitation
speed, lipase dosage and water content on the total conversion were systematically analyzed. Under the optimal conditions
identified (6 mL tert-amyl alcohol, three molar ratio of methanol to oil, 2% Novozym 435 lipase based on the soybean oil weight, temperature 40°C,
2% water content based on soybean oil weight, 150 rpm and 15 h), the highest biodiesel conversion yield of 97% was obtained.
With tert-amyl alcohol as the reaction medium, the negative effects caused by excessive molar ratio of methanol to oil and the by-product
glycerol could be reduced. Furthermore, there was no evident loss in the lipase activity even after being repeatedly used
for more than 150 runs. |
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Keywords: | Biodiesel Lipase Methanolysis Stability tert-Amyl alcohol |
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