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

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• 作者：Lin Zhang ; Yadong Cui ; Chunping Zhang ; Lei Wang ; Hui Wan ; Guofeng Guan
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2012
• 出版时间：December 26, 2012
• 年：2012
• 卷：51
• 期：51
• 页码：16590-16596
• 全文大小：380K
• 年卷期：v.51,no.51(December 26, 2012)
• ISSN：1520-5045

文摘

The esterification of oleic acid with short-chain alcohols using Br酶nsted 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 Br酶nsted 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, N₂ adsorption鈥揹esorption 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 Br酶nsted 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.