Open AccessTransesterification of waste oil to biodiesel using Brønsted acid ionic liquid as catalyst
Author(s) -
Shiwei Liu,
Zhiping Wang,
Shitao Yu,
Congxia Xie
Publication year - 2013
Publication title -
bulletin of the chemical society of ethiopia
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.288
H-Index - 25
eISSN - 1726-801X
pISSN - 1011-3924
DOI - 10.4314/bcse.v27i2.14
Subject(s) - ionic liquid , chemistry , biodiesel , catalysis , transesterification , methanol , biodiesel production , yield (engineering) , raw material , reusability , waste oil , organic chemistry , environmentally friendly , sulfonic acid , nuclear chemistry , materials science , ecology , software , computer science , metallurgy , biology , programming language
Brønsted acid ionic liquids were employed for the preparation of biodiesel using waste oil as the feedstock. It was found that IL 1–(3–sulfonic acid)propyl–3–methylimidazole hydrosulfate–[HO3S-pmim]HSO4 was an efficient catalyst for the reaction under the optimum conditions: n(oil):n(methanol) 1:12, waste oil 15.0 g, ionic liquid 2.0 g, reaction temperature 120 oC and reaction time 8 h, the yield of biodiesel was more than 96%. The reusability of the ionic liquid was also investigated. When the ionic liquid was repeatedly used for five times, the yield of product was still more than 93%. Therefore, an efficient and environmentally friendly catalyst was provided for the synthesis of biodiesel from waste oils