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Direct Synthesis of Dimethyl Carbonate from Carbon Dioxide and Methanol at Room Temperature Using Imidazolium Hydrogen Carbonate Ionic Liquid as a Recyclable Catalyst and Dehydrant
Author(s) -
Zhao Tianxiang,
Hu Xingbang,
Wu Dongsheng,
Li Rui,
Yang Guoqiang,
Wu Youting
Publication year - 2017
Publication title -
chemsuschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.412
H-Index - 157
eISSN - 1864-564X
pISSN - 1864-5631
DOI - 10.1002/cssc.201700128
Subject(s) - ionic liquid , dimethyl carbonate , catalysis , chemistry , carbonate , methanol , inorganic chemistry , hydrogen , carbon dioxide , carbon fibers , organic chemistry , materials science , composite number , composite material
The direct synthesis of dimethyl carbonate (DMC) from CO 2 and CH 3 OH was achieved at room temperature with 74 % CH 3 OH conversion in the presence of an imidazolium hydrogen carbonate ionic liquid ([C n C m Im][HCO 3 ]). Experimental and theoretical results reveal that [C n C m Im][HCO 3 ] can transform quickly into a CO 2 adduct, which serves as an effective catalyst and dehydrant. Its dehydration ability is reversible. The energy barrier of the rate‐determining step for the DMC synthesis is only 21.7 kcal mol −1 . The ionic liquid can be reused easily without a significant loss of its catalytic and dehydrating ability.