Solubility of CO2 in 1-(2-hydroxyethyl)-3-methylimidazolium ionic liquids with different anions

被引：99

作者：

Jalili, Amir Hossein ^{[1
]}

Mehdizadeh, Ali ^{[1
]}

Shokouhi, Mohammad ^{[1
]}

Sakhaeinia, Hossein ^{[2
]}

Taghikhani, Vahid ^{[3
]}

机构：

[1] NIOC, RIPI, Gas Res Div, Gas Sci Dept, Tehran, Iran

[2] Islamic Azad Univ, Dept Chem Engn, Fac Engn, Semnan, Iran

[3] Sharif Univ Technol, Dept Chem & Petr Engn, Tehran, Iran

来源：

JOURNAL OF CHEMICAL THERMODYNAMICS | 2010年 / 42卷 / 06期

关键词：

Gas solubility; Henry's law constant; Carbon dioxide; Ionic liquid; Gibbs free energy of solution; PRESSURE PHASE-BEHAVIOR; CARBON-DIOXIDE; SYSTEMS;

D O I：

10.1016/j.jct.2010.02.002

中图分类号：

O414.1 [热力学];

学科分类号：

摘要：

The solubility of carbon dioxide in a series of 1-(2-hydroxyethyl)-3-methylimidazolium ([hemim](+)) based ionic liquids (ILs) with different anions, viz. hexafluorophosphate ([PF6](-)), trifluoromethanesulfonate ([OTf](-)), and bis-(trifluoromethyl)sulfonylimide ([Tf2N](-)) at temperatures ranging from 303.15 K to 353.15 K and pressures up to 1.3 MPa were determined. The solubility data were correlated using the Krichevsky-Kasarnovsky equation and Henry's law constants were obtained at different temperatures. Using the solubility data, the partial molar thermodynamic functions of solution such as Gibbs free energy, enthalpy, and entropy were calculated. Comparison showed that the solubility of CO2 in the ILs studied follows the same behaviour as the corresponding conventional 1-ethyl-3-methylimidazolium ([emim](+)) based ILs with the same anions, i.e. [hemim][NTf2] > [hemim][OTf] > [hemim][PF6] > [hemim][BF4]. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：787 / 791

页数：5

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