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Carbon Dioxide Capture by Aqueous Ionic Liquid Solutions
Author(s) -
Simon Nathalia M.,
Zanatta Marcileia,
dos Santos Francisco P.,
Corvo Marta C.,
Cabrita Eurico J.,
Dupont Jairton
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.201701044
Subject(s) - aqueous solution , ionic liquid , chemistry , bicarbonate , sorption , inorganic chemistry , carbon dioxide , zeolitic imidazolate framework , imidazolate , absorption (acoustics) , organic chemistry , adsorption , catalysis , materials science , metal organic framework , composite material
Confined water in aqueous solutions of imidazolium‐based ionic liquids (ILs) associated with acetate and imidazolate anions react reversibly with CO 2 to yield bicarbonate. Three types of CO 2 sorption in these “IL aqueous solutions” were observed: physical, CO 2 ‐imidazolium adduct generation, and bicarbonate formation (up to 1.9 mol bicarbonate  mol −1 of IL), resulting in a 10:1 (molar ratio) total absorption of CO 2 relative to imidazolate anions in the presence of water 1:1000 (IL/water). These sorption values are higher than the classical alkanol amines or even alkaline aqueous solutions under similar experimental conditions.

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