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Microwave‐Assisted Esterification of Oleic Acid Using an Ionic Liquid Catalyst
Author(s) -
Bölük Servet,
Sönmez Özgür
Publication year - 2020
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.202000045
Subject(s) - ionic liquid , catalysis , biodiesel , oleic acid , reusability , chemistry , imidazole , microwave , hydrogen sulfate , biodiesel production , organic chemistry , biochemistry , programming language , physics , software , quantum mechanics , computer science
The combination of 1‐butyl‐3‐methylimidazolium hydrogen sulfate ([Bmim]HSO 4 ) ionic liquid (IL) and microwave heating was used to esterify oleic acid as a green approach in biodiesel synthesis. To compare the heating systems, conventional heating and the ultrasonic method were employed but the microwave method was found to be more effective. H 2 SO 4 and 1‐methyl imidazole hydrogen sulfate ([Hmim]HSO 4 ) were also used in the esterification of oleic acid and their catalytic activities were compared to that of [Bmim]HSO 4 . ILs provided some advantages such as reusability, easy recyclability, and very stable activity. There was only a small decrease in the catalytic activity of [Bmim]HSO 4 after four successive applications, which means that ILs can be reused, contrary to homogeneous catalysts. The combination of IL catalysts and microwave irradiation proved to be a potential alternative method for biodiesel production.