固定化脂肪酶催化棉籽油与碳酸二甲酯反应制备生物柴油  被引量:7

Synthesis of Biodiesel from Cottonseed Oil and Dimethyl Carbonate Catalyzed by Immobilized Lipase

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作  者:田雪[1] 周斌[1] 李鑫[1] 陈芳[1] 高剑峰[1] 

机构地区:[1]石河子大学生命科学学院,新疆石河子832003

出  处:《石油化工》2009年第6期677-681,共5页Petrochemical Technology

基  金:新疆生产建设兵团博士资金项目(2006JC10)

摘  要:以叔丁醇为有机溶剂,采用固定化脂肪酶Novozym435催化棉籽油与碳酸二甲酯进行酯交换反应制备了生物柴油,考察了加水量、碳酸二甲酯与棉籽油的摩尔比、反应温度、反应时间、搅拌转速、Novozym435用量(基于棉籽油的质量分数)和叔丁醇与碳酸二甲酯的体积比对脂肪酸甲酯收率的影响,以及Novozym435的重复使用性能。实验结果表明,在碳酸二甲酯与棉籽油的摩尔比为4、叔丁醇与碳酸二甲酯体积比为1.5、Novozym435用量(基于棉籽油的质量分数)12.5%、反应温度50℃、反应时间24h、搅拌转速160r/min、不加水的优化反应条件下,脂肪酸甲酯收率可达96%以上;与石油醚溶剂相比,Novozym435在叔丁醇溶剂中的稳定性较好。Synthesis of biodiesel via transesterification of cottonseed oil with dimethyl carbonate catalyzed by immobilized candida antarctica lipase (Novozym435) in t-butanol solvent was studied. Effects of water addition amount, n (dimethyl carbonate ) : n (cottonseed oil ), reaction temperature, reaction time,Novozym435 dosage, stir speed and V(t-butanol) : V( dimethyl carbonate) on yield of fatty acid methyl ester were investigated. Under optimal transesterification conditions: n (dimethyl carbonate): n (cottonseed oil) 4, V (t-bntanol) : V (dimethyl carbonate) 1. 5, mass fraction of Novozym435 12.5% (based on cottonseed oil), reaction temperature 50℃ ,reaction time 24 h, stir speed 160 r/min and without addition of water, yield to fatty acid methyl ester was above 96%. Reusability of Novozym435 was improved greatly in comparing with using petroleum ether as solvent of the reaction system.

关 键 词:生物柴油 棉籽油 碳酸二甲酯 固定化脂肪酶 叔丁醇 酯交换 

分 类 号:TQ517.2[化学工程]

 

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