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《The Chinese Journal of Process Engineering》 2006-04
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Biodiesel Preparation from Transesterification of Cotton Seed Oil by Solid Acids Catalysis

CHEN He,WANG Jin-fu(Department of Chemical Engineering,Tsinghua University,Beijing 100084,China)  
Methyl esters(biodiesel)were produced by transesterification of cottonseed oil with methanol in the presence of solid acids as heterogeneous catalyst.The solid acids were prepared by mounting H2SO4 on TiO2?nH2O and Zr(OH)4,respectively,followed by calcining at 823 K.TiO2?SO42? and ZrO2?SO42? were employed as catalyst for transesterification with high activity.The yield of methyl esters reached over 90% under the conditions of 230℃,methanol/oil mole ratio of 12:1,reaction time 8 h and catalyst dosage(catalyst/oil)of 2%.The solid acid catalysts have more adaptability than the solid bases catalysts when the oil has high acidity.Spectral analysis of absorbing pyridine IR of the samples showed that there were Lewis and Bronsted acid centers on the catalysts.
【Fund】: 国家重点基础研究发展计划(973计划)资助项目(编号:2004CB719706)
【CateGory Index】: TE667
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