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Catalysts 2017, 7(4), 102; doi:10.3390/catal7040102

Caprolactam-Based Brønsted Acidic Ionic Liquids for Biodiesel Production from Jatropha Oil

State Key Laboratory of Heavy Oil Processing, China University of Petroleum, Qingdao 266580, China
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Received: 21 February 2017 / Revised: 20 March 2017 / Accepted: 23 March 2017 / Published: 27 March 2017
(This article belongs to the Special Issue Organocatalysis in Ionic Liquids)
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Abstract

Caprolactam-based ionic liquids show many advantages, such as the lower toxicity, lower cost, and a simple preparation process. In this work, caprolactam-based ionic liquids were prepared and adopted as catalysts for the transesterification of Jatropha oil with methanol. The results demonstrated that the SO3H-functional caprolactam‐based ionic liquids have higher catalytic activity than those of the caprolactam-based ionic liquids without sulfonic group or the SO3H-functional pyridine-based ionic liquids, attributed to their stronger Brønsted acidity. By optimizing the reaction parameter, the biodiesel yield catalyzed by 1-(4-sulfonic group) butylcaprolactamium hydrogen sulfate ([HSO3-bCPL][HSO4]) could reach above 95% at 140 °C for 3 h. Furthermore, the ionic liquid had a good reusability. View Full-Text
Keywords: biodiesel; caprolactam-based ionic liquid; transesterification; acidity biodiesel; caprolactam-based ionic liquid; transesterification; acidity
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Luo, H.; Yin, H.; Wang, R.; Fan, W.; Nan, G. Caprolactam-Based Brønsted Acidic Ionic Liquids for Biodiesel Production from Jatropha Oil. Catalysts 2017, 7, 102.

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