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Tuning the Basicity of Cyano‐Containing Ionic Liquids to Improve SO 2 Capture through Cyano–Sulfur Interactions
Author(s) -
Cui Guokai,
Zhang Fengtao,
Zhou Xiuyuan,
Li Haoran,
Wang Jianji,
Wang Congmin
Publication year - 2015
Publication title -
chemistry – a european journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.687
H-Index - 242
eISSN - 1521-3765
pISSN - 0947-6539
DOI - 10.1002/chem.201405683
Subject(s) - sulfur , ionic liquid , sorption , chemistry , quantum chemical , fourier transform infrared spectroscopy , inorganic chemistry , process (computing) , computational chemistry , organic chemistry , chemical engineering , molecule , catalysis , adsorption , computer science , engineering , operating system
A new approach has been developed to improve SO 2 sorption by cyano‐containing ionic liquids (ILs) through tuning the basicity of ILs and cyano–sulfur interaction. Several kinds of cyano‐containing ILs with different basicity were designed, prepared, and used for SO 2 capture. The interaction between these cyano‐containing ILs and SO 2 was investigated by FTIR and NMR methods. Spectroscopic investigations and quantum chemical calculations showed that dramatic effects on SO 2 capacity originate from the basicity of the ILs and enhanced cyano–sulfur interaction. Furthermore, the captured SO 2 was easy to release by heating or bubbling N 2 through the ILs. This efficient and reversible process, achieved by tuning the basicity of ILs, is an excellent alternative to current technologies for SO 2 capture.