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
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
收藏
页码:4927 / 4933
页数:7
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