文献类型：期刊文献

英文题名：Kinetics of transesterification of palm oil and dimethyl carbonate for biodiesel production at the catalysis of heterogeneous base catalyst

作者：Zhang, Liping[1];Sheng, Boyang[1];Xin, Zhong[1];Liu, Qun[1];Sun, Shuzhen

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

年份：2010

卷号：101

期号：21

起止页码：8144

外文期刊名：BIORESOURCE TECHNOLOGY

收录：;EI(收录号：20102813078094);WOS:【SCI-EXPANDED(收录号:WOS:000280570900018)】；

基金：This work was funded by the National High Technology Research and Development Program of China, Grant number 2009AA05Z404, the National Science Foundation for Post-doctoral Scientists of China, Grant number 20090450669 and the Shanghai Postdoctoral Sustentation Fund, Grant number 09R21412000, with additional support from JiLin Fuel Alcohol Co. Ltd.

语种：英文

外文关键词：Biodiesel; Transesterification; Dimethyl carbonate; Kinetics; Mechanism

摘要：The transesterification of palm oil with dimethyl carbonate (DMC) for preparing biodiesel has been studied in solvent-free system at the catalysis of potassium hydroxide (KOH) as heterogeneous catalyst. Fatty acid methyl esters (FAMES) were analyzed by GC with internal standard method. The effects of reaction conditions (molar ratio of DMC and palm oil, catalyst amount and time) on FAMEs yield were investigated. The highest FAMEs yield could reach 96.2% at refluxing temperature for 8 h with molar ratio of DMC and oil 9:1 and 8.5% KOH (based on oil weight). Kinetics of the KOH-catalyzed transesterification of palm oil and DMC was researched over a temperature range of 65-75 degrees C. A pseudo first-order model was proposed. The activation energy (E-a) was 79.1 kJ mol(-1) and the pre-exponential factor (k(o)) was 1.26 x 10(9) min(-1) from Arrhenius equation. Further, a plausible reaction mechanism for the catalytic process with DMC as acyl acceptor was proposed. (c) 2010 Elsevier Ltd. All rights reserved.