文献类型：期刊文献

英文题名：Synthesis of biodiesel from vegetable oil with methanol catalyzed by Li-doped magnesium oxide catalysts

作者：Wen, Zhenzhong[1];Yu, Xinhai[1];Tu, Shan-Tung[1];Yan, Jinyue[2,3];Dahlquist, Erik[2]

机构：[1]E China Univ Sci & Technol, Sch Mech & Power Engn, Shanghai 200237, Peoples R China;[2]Malardalen Univ, Sch Sustainable Dev Soc & Technol, SE-72123 Vasteras, Sweden;[3]Royal Inst Technol, Sch Chem Sci & Engn, SE-10044 Stockholm, Sweden

年份：2010

卷号：87

期号：3

起止页码：743

外文期刊名：APPLIED ENERGY

收录：;EI(收录号：20095112563534);WOS:【SCI-EXPANDED(收录号:WOS:000272563400003)】；

基金：This study has been financially supported by the Swedish Research Links Programme by Swedish Research Council (VR) and the China Natural Science Foundation (Contract No. 20606011).

语种：英文

外文关键词：Biodiesel; Transesterification; Li-doped; MgO; Solid base

摘要：The preparation of a Li-doped MgO for biodiesel synthesis has been investigated by optimizing the catalyst composition and calcination temperatures. The results show that the formation of strong base sites is particularly promoted by the addition of Li, thus resulting in an increase of the biodiesel synthesis. The catalyst with the Li/Mg molar ratio of 0.08 and calcination temperature of 823 K exhibits the best performance. The biodiesel conversion decreases with further increasing Lift molar ratio above 0.08, which is most likely attributed to the separated lithium hydroxide formed by excess Li ions and a concomitant decrease of BET values. In addition, the effects of methanol/oil molar ratio, reaction time, catalyst amount, and catalyst stability were also investigated for the optimized Li-doped MgO. The metal leaching from the Li-doped MgO catalysts was detected, indicating more studies are needed to stabilize the catalysts for its application in the large-scale biodiesel production facilities. (C) 2009 Elsevier Ltd. All rights reserved.