Biodiesel Production by Esterification of Oleic Acid over Bronsted Acidic Ionic Liquid Supported onto Fe-Incorporated SBA-15

被引：93
作者：
Zhang, Lin [1 ]
Cui, Yadong [1 ]
Zhang, Chunping [1 ]
Wang, Lei [1 ]
Wan, Hui [1 ]
Guan, Guofeng [1 ]
机构：
[1] Nanjing Univ Technol, Coll Chem & Chem Engn, Nanjing 210009, Peoples R China
来源：
INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2012年 / 51卷 / 51期
基金：
中国国家自然科学基金;
关键词：
FREE FATTY-ACIDS; HETEROGENEOUS CATALYSTS; TRANSESTERIFICATION; EFFICIENT; OIL; METHANOL; SILICA;
D O I：
10.1021/ie302419y
中图分类号：
TQ [化学工业];
学科分类号：
0817 ;
摘要：
The esterification of oleic acid with short-chain alcohols using Bronsted acidic ionic liquid supported onto Fe-incorporated SBA-15 (Fe-SBA-15) was studied to develop a green method for biodiesel production. This catalyst was prepared by immobilization of Bronsted acidic ionic liquid 1-(propyl-3-sulfonate)-3-(3-trimethoxysilylpropyl) imidazolium hydrogen sulfate ([SO3H-PIm-CPMS][HSO4]) onto Fe-SBA-15 (IL/Fe-SBA-15). The structure of the catalyst was characterized by XRD, N-2 adsorption-desorption measurement, FT-IR and TEM. The results demonstrated that Fe was incorporated into the framework of SBA-15, bringing Lewis acidic site. After the ionic liquid was successfully immobilized onto the surface of Fe-SBA-15, the structure of the catalyst remained intact. This catalyst displayed relatively high catalytic activity in esterification of oleic acid with short-chain alcohols because of the synergistic effect of Lewis and Bronsted acidic sites. Under the optimum reaction conditions (reaction temperature 363 K, molar ratio of methanol to oleic acid 6: 1, catalyst amount 5 wt %, and reaction time 3 h), the conversion of oleic acid reached to 87.7% when methanol was used as reactant.
引用
收藏
页码：16590 / 16596
页数：7
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