Biodiesel production by the transesterification of cottonseed oil by solid acid catalysts  

作　　者：CHEN He PENG Baoxiang WANG Dezheng WANG Jinfu 

机构地区：[1]Department of Chemical Engineering,Tsinghua University,Beijing 100084,China

出　　处：《Frontiers of Chemical Science and Engineering》2007年第1期11-15,共5页化学科学与工程前沿（英文版）

摘　　要：Methyl esters(biodiesel)were produced by the transesterification of cottonseed oil with methanol in the presence of solid acids as heterogeneous catalysts.The solid acids were prepared by mounting H_(2)SO_(4) on TiO_(2)·nH_(2)O and Zr(OH)4,respectively,followed by calcining at 823K.TiO_(2)-SO_(4)^(2-)and ZrO_(2)-SO_(4)^(2-)showed high activity for the transester-ification.The yield of methyl esters was over 90%under the conditions of 230℃,methanol/oil mole ratio of 12:1,reac-tion time 8 h and catalyst amount(catalyst/oil)of 2%(w).The solid acid catalysts showed more better adaptability than solid base catalysts when the oil has high acidity.IR spectral analysis of absorbed pyridine on the samples showed that there were Lewis and Brønsted acid sites on the catalysts.

关 键 词：BIODIESEL methyl esters TRANSESTERIFICATION solid acids 

分 类 号：O62[理学—有机化学]