文献类型：期刊文献

英文题名：Kinetic study on lipase catalyzed trans-esterification of palm oil and dimethyl carbonate for biodiesel production

作者：Sun, Shuzhen;Zhang, Liping;Meng, Xin;Xin, Zhong[1]

机构：[1]E China Univ Sci & Technol, Sch Chem Engn, State Key Lab Chem Engn, Shanghai 200237, Peoples R China; E China Univ Sci & Technol, Sch Chem Engn, Dept Prod Engn, Shanghai 200237, Peoples R China

年份：2013

卷号：5

期号：3

外文期刊名：JOURNAL OF RENEWABLE AND SUSTAINABLE ENERGY

收录：;EI(收录号：20132916504034);WOS:【SCI-EXPANDED(收录号:WOS:000321152400052)】；

基金：This work was funded by the National High Technology Research and Development Program of China, Grant No. 2009AA05Z404, the National Science Foundation for Post-doctoral Scientists of China, Grant No. 20090450669, and the Shanghai Postdoctoral Sustentation Fund, Grant No. 09R21412000, with additional support from JiLin Fuel Alcohol Co., Ltd.

语种：英文

外文关键词：Activation energy - Catalysis - Esters - Biodiesel - Kinetics - Mass transfer - Oil shale - Reaction rates

摘要：Kinetics of the trans-esterification of palm oil and dimethyl carbonate (DMC) for biodiesel production has been studied at the catalysis of immobilized lipase Novozyme 435. The relationship between initial reaction rate and temperature was established and the activation energy (Ea) was obtained first, based on the Arrhenius law. The value of Ea was 26.0 kJ/mol. The external diffusion limitation was neglected by raising the agitation speed to 200 rpm. And the influence of internal mass transfer limitations could also be neglected due to the linear relationship between the initial reaction rate and enzyme concentration. The effect of the concentration of palm oil was studied over the range of 30-700 mmol/l by keeping the catalyst amount constant. No substrate inhibition was observed under above experiment conditions. Therefore, the model based on a Ping-Pong bi-bi mechanism without substrate inhibition was proposed to describe the trans-esterification kinetics. The simulated values calculated by MATLAB could fit the experimental values quite well, indicating the trans-esterification kinetics of palm oil and DMC agrees with the ordered bi-bi mechanism. (C) 2013 AIP Publishing LLC.