Carbon Dioxide Capture by Aqueous Ionic Liquid Solutions

被引：72

作者：

Simon, Nathalia M. ^{[1
]}

Zanatta, Marcileia ^{[1
]}

dos Santos, Francisco P. ^{[1
]}

Corvo, Marta C. ^{[2
]}

Cabrita, Eurico J. ^{[3
]}

Dupont, Jairton ^{[1
]}

机构：

[1] Univ Fed Rio Grande do Sul, Inst Chem, Ave Bento Goncalves 9500, BR-91501970 Porto Alegre, RS, Brazil

[2] UNL, Dept Ciencia Mat, I3N CENIMAT, Fac Ciencias & Tecnol, P-2829516 Caparica, Portugal

[3] UNL, Dept Quim, UCIBIO REQUIMTE, Fac Ciencias & Tecnol, P-2829516 Caparica, Portugal

来源：

CHEMSUSCHEM | 2017年 / 10卷 / 24期

基金：

巴西圣保罗研究基金会;

关键词：

bicarbonate species; carbon dioxide capture; confined water; ionic liquids; nuclear magnetic resonance; CO2; CAPTURE; PHASE-BEHAVIOR; FORMIC-ACID; AB-INITIO; WATER; SOLUBILITY; ACETATE; MIXTURES; NMR; HYDROGENATION;

D O I：

10.1002/cssc.201701044

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Confined water in aqueous solutions of imidazolium-based ionic liquids (ILs) associated with acetate and imidazolate anions react reversibly with CO2 to yield bicarbonate. Three types of CO2 sorption in these "IL aqueous solutions" were observed: physical, CO2-imidazolium adduct generation, and bicarbonate formation (up to 1.9mol(bicarbonate) mol(-1) of IL), resulting in a 10:1 (molar ratio) total absorption of CO2 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.

引用

页码：4927 / 4933

页数：7

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