固定化离子液体高效催化废弃食用油合成生物柴油

晏冬霞 石春艳 吕兴梅 辛加余 王公应

doi:10.12034/j.issn.1009-606X.20180165

过程工程学报 >

2018 , Vol. 18 >Issue S1: 129 - 137

DOI: https://doi.org/10.12034/j.issn.1009-606X.20180165

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固定化离子液体高效催化废弃食用油合成生物柴油

晏冬霞石春艳吕兴梅辛加余王公应

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1. 中国科学院成都有机化学研究所催化与环境工程研究中心，四川成都 610041 2. 中国科学院过程工程研究所离子液体清洁过程北京市重点实验室，北京 100190 3. 中国科学院大学化工学院，北京 100049

收稿日期: 2018-05-08

修回日期: 2018-06-19

网络出版日期: 2018-11-19

基金资助

国家自然科学基金;国家自然科学基金;四川省“千人计划”顶尖创新团队

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Efficient conversion of waste cooking oil into biodiesel catalyzed by immobilized ionic liquid

Dongxia YAN Chunyan SHI Xingmei Lü Jiayu XIN Gongying WANG

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1. Catalytic and Environmental Engineering Research Center, Chengdu Institute of Organic Chemistry, Chinese Academy of Sciences, Chengdu, Sichuan 610041, China 2. Beijing Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100090, China 3. School of Chemical Engineering, University of Chinese Academy of Sciences, Beijing 100049, China

Received date: 2018-05-08

Revised date: 2018-06-19

Online published: 2018-11-19

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摘要

采用溶胶?凝胶技术和浸渍法制备了固定化1-(4-丁基磺酸)-3-甲基咪唑硫酸氢盐([(n-Bu-SO3H)MIm][HSO4])离子液体(IL)，得到了一种适用于游离脂肪酸和甲醇酯化反应的不溶性IL催化体系，对合成的催化剂进行了表征，并对其活性进行了系统评价. 结果表明，离子液体成功负载于载体上，该固定化Br?nsted性离子液体在油酸和甲醇酯化反应中具有非常好的催化活性，在最佳反应条件下，油酸的转化率高达98.4%. 该催化剂用于催化高游离脂肪酸含量的废弃食用油酯化时，经后续碱催化酯交换反应，可获得收率高达94.7%的生物柴油.

关键词： 生物柴油; 废弃食用油; 离子液体; 溶胶-凝胶技术; 浸渍法

本文引用格式

晏冬霞石春艳吕兴梅辛加余王公应 . 固定化离子液体高效催化废弃食用油合成生物柴油[J]. 过程工程学报, 2018 , 18(S1) : 129 -137 . DOI: 10.12034/j.issn.1009-606X.20180165

Abstract

Ionic liquids possess excellent catalytic activities for various chemical reactions including esterification reaction, but the difficulty in phase separation is a major barrier. An immobilized ionic liquid (IL), 1-(4-butylsulfonic)-3-methylimidazolium hydrosulfate [(n-Bu-SO3H)MIm][HSO4], based on sol?gel technique and wetness impregnation method was developed in order to obtain an insoluble IL catalytic system suitable for the esterification of free fatty acids and methanol. The synthesized catalysts were characterized by various techniques and the catalytic properties were fully evaluated. The results demonstrated that the ionic liquid was successfully incorporated into the support. This immobilized Br?nsted ionic liquid catalysts displayed relatively high catalytic activity in esterification of oleic acid and methanol. Under the optimum reaction conditions, the conversion of oleic acid reached to 98.4%. The catalyst was also applied to catalyze the esterification of real waste cooking oil having high free fatty acid and followed by alkyli-catalyzed transesterification, a biodiesel yield of 94.7% was achieved.

Key words： biodiesel; waste cooking oil; ionic liquid; sol-gel technique; wetness impregnation method

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