固体酸SiO_2-Ti(SO_4)_2-Zr(SO_4)_2催化麻疯树籽油醇解反应的研究  

Alcoholysis reaction of Jatropha curcas L. seed oil catalyzed by solid acid SiO_2-Ti(SO_4)_2-Zr(SO_4)_2

作　　者：丁敏[1] 曹栋[1] 陈璐 钱丽[1] 陈超[1] 

机构地区：[1]江南大学食品学院,江苏无锡214122

出　　处：《中国油脂》2015年第4期55-59,共5页China Oils and Fats

摘　　要：通过溶胶-凝胶法制备了Si O2载体,所得载体再通过浸渍法制备得到负载Ti(SO4)2和Zr(SO4)2的复合型固体酸催化剂Si O2-Ti(SO4)2-Zr(SO4)2,利用热重分析(TG-DTG)和傅里叶红外光谱(FTIR)对催化剂的特性进行初步表征。此外,以转化率为指标,研究了复合型固体酸催化剂在麻疯树籽油醇解反应中的催化活性,并考察催化剂用量、醇油摩尔比、反应温度和反应时间对醇解反应的影响。TG-DTG分析结果表明,催化剂的焙烧温度应选择300℃,此条件下可以制备催化活性较好的催化剂;FTIR表征结果表明,浸渍Ti(SO4)2和Zr(SO4)2后,该活性物质成功负载到Si O2载体表面。单因素实验结果表明最佳反应条件为:反应温度120℃,催化剂用量5%,醇油摩尔比15∶1,反应时间5 h;在此条件下,麻疯树籽油的转化率最高可达92.53%。Si O2 carrier was prepared by gel-sol method and the composite solid acid catalyst Si O2-Ti（SO4）2-Zr（SO4）2was synthesized by impregnating Ti（SO4）2and Zr（SO4）2to the Si O2 carrier. The primary characterization of the catalyst was analyzed by FTIR and TG-DTG. The catalytic activity of the catalyst in the alcoholysis reaction of Jatropha curcas L. seed oil was studied. The effects of catalyst dosage,molar ratio of methanol to oil,reaction time and reaction temperature on alcoholysis reaction were investigated with conversion rate as index. TG-DTG analysis result showed the calcination temperature should be set at 300 ℃ so as to prepare high catalytic and efficient catalyst; FTIR characterization result indicated Ti（SO4）2and Zr（SO4）2had been successfully loaded on the surface of Si O2 carrier after impregnation. The optimal reaction conditions were obtained by single factor experiment as follows： reaction temperature 120 ℃,molar ratio of methanol to oil 15∶ 1,catalyst dosage 5% and reaction time 5 h. Under these conditions,the conversion rate of Jatropha curcas L. seed oil was the highest,reaching 92. 53%.

关 键 词：麻疯树籽油 醇解反应 固体酸催化剂 

分 类 号：TE667[石油与天然气工程—油气加工工程]