摘要
研究了Novozym435和LipozymeTLIM混合脂肪酶催化香叶树籽油制备生物柴油,2种酶按1∶3质量比混合使用时,既可提高反应转化率,又可降低酶的使用成本。应用响应面优化法确定了固定化酶催化香叶树籽生物柴油的最优工艺参数,采用叔丁醇作为反应体系的溶剂,最优反应条件为反应温度38.5℃、甲醇与油摩尔比4∶1、叔丁醇与油体积比1∶1.5、酶用量为油质量的4%,此时反应转化率达90.09%。分析表明香叶树籽油的甘油三酯主要由短链脂肪酸甘油酯组成,生物柴油中原油的甘油三酯已完全转变成脂肪酸甲酯。
Lindera communis seed oil is used to producing biodiesel catalyzed by blend lipase of Novozym 435 and Lipozyme TLIM at the optimized rate of 1∶3,which can reduce the cost of lipase and improve the conversive rate.With response surface methodology the optimized parameters are obtained as follows:with tert-butanol adopted as a reaction medium for lipase-catalyzed methanolysis of oils,the biodiesel with best conversive rate of 90.09% can be produced at 38.5℃ with 4∶1 of the molar ratio of methanol to oil,1∶1 of the volume ratio of tert-butanol to oil,and 4% of the lipase catalyst concentration.The triacylglycerols from Lindera communis oil are composed of low hydrocarbon fatty acid triacylglycerols,which had been completely converted into fatty acid methyl esters by immobilized lipase.
出处
《现代化工》
CAS
CSCD
北大核心
2009年第S1期289-292,294,共5页
Modern Chemical Industry
基金
中国博士后基金资助项目(20060400401)
