Brönsted acid surfactant-combined dicationic ionic liquids as green catalysts for biodiesel synthesis from free fatty acids and alcohols

doi:10.1016/S1872-2067(15)60852-X

Abstract

Abstract:

Quaternary ammonium Brönsted acid surfactant-combined dicationic ionic liquids (BASDILs) based on zwitterionic 1,2-bis[N-methyl-N-(3-sulfopropyl)-alkylammonium]ethane betaines and various anions were prepared and characterized. BASDILs possess properties similar to those of phase-separated catalysts and were applied to the catalytic synthesis of biodiesel from free fatty acids and alcohols. Several factors were investigated and the results indicated that [C₁₂Sb][p-CH₃C₆H₄SO₃] was the optimal catalyst, with good catalytic performance and reusability under mild conditions.

Key words: Biodiesel, Esterification, Brönsted acidity, Surfactant-combined dicationic ionic, liquid, Phase separated catalyst

Tao Chang, Leqin He, Xiaojing Zhang, Mingxia Yuan, Shenjun Qin, Jiquan Zhao . Brönsted acid surfactant-combined dicationic ionic liquids as green catalysts for biodiesel synthesis from free fatty acids and alcohols[J]. Chinese Journal of Catalysis, 2015, 36(7): 982-986.

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URL: https://www.cjcatal.com/EN/10.1016/S1872-2067(15)60852-X

https://www.cjcatal.com/EN/Y2015/V36/I7/982

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