文献类型：期刊文献

英文题名：Improvement in biodiesel production from soapstock oil by one-stage lipase catalyzed methanolysis

作者：Su, Erzheng[1,2,3];Wei, Dongzhi[4]

机构：[1]Nanjing Forestry Univ, Coll Light Ind Sci & Engn, Enzyme & Fermentat Technol Lab, Nanjing 210037, Jiangsu, Peoples R China;[2]Nanjing Forestry Univ, Jiangsu Prov Key Lab Pulp & Paper Sci & Technol, Nanjing 210037, Jiangsu, Peoples R China;[3]MIT, Dept Chem, Cambridge, MA 02139 USA;[4]E China Univ Sci & Technol, New World Inst Biotechnol, State Key Lab Bioreactor Engn, Shanghai 200237, Peoples R China

年份：2014

卷号：88

起止页码：60

外文期刊名：ENERGY CONVERSION AND MANAGEMENT

收录：;EI(收录号：20144100090909);WOS:【SCI-EXPANDED(收录号:WOS:000345725400006)】；

基金：This work was supported by "A Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions, PAPD", the "Scientific Research Fund of Nanjing Forestry University for the Introduction of High-level talents", the "Program for the Top Young Talents of Nanjing Forestry University" and the "Open Fund of Jiangsu Provincial Key Lab of Pulp and Paper Science and Technology". Dr. Erzheng Su thanks China Scholarship Council and Nanjing Forestry University for an Overseas Visiting Scholarship.

语种：英文

外文关键词：Soapstock; Biodiesel; Lipase; Methanolysis; One-stage

摘要：A major obstacle in the commercialization of biodiesel is its cost of manufacturing, primarily the raw material cost. In order to decrease the cost of biodiesel, soapstock oil was investigated as the feedstock for biodiesel production. Because the soapstock oil containing large amounts of free fatty acids (FFAs) cannot be effectively converted to biodiesel, complicated two-stage process (esterification followed by transesterification) was generally adopted. In this study, simple one-stage lipase catalyzed methanolysis of soapstock oil was developed via one-pot esterification and transesterification. Water produced by lipase catalyzed esterification of FFAs affected the lipase catalyzed transesterification of glycerides in the soapstock oil severely. Addition of tert-alcohol could overcome this problem and enhance the fatty acid methyl ester (FAME) yield from 42.8% to 76.4%. The FAME yield was further elevated to 95.2% by optimizing the methanol/oil molar ratio, lipase amount, and water absorbent. The developed process enables the simple, efficient, and green production of biodiesel from soapstock oil, providing with a potential industrial application. (C) 2014 Elsevier Ltd. All rights reserved.