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

Dongxia YAN  Chunyan SHI  Xingmei Lü  Jiayu XIN  Gongying WANG

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

The Chinese Journal of Process Engineering >

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

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

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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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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

Cite this article

Dongxia YAN Chunyan SHI Xingmei Lü Jiayu XIN Gongying WANG . Efficient conversion of waste cooking oil into biodiesel catalyzed by immobilized ionic liquid[J]. The Chinese Journal of Process Engineering, 2018 , 18(S1) : 129 -137 . DOI: 10.12034/j.issn.1009-606X.20180165

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