Solubilities of CO2, H2, N2 and O2 in ionic liquid 1-n-butyl-3-methylimidazolium heptafluorobutyrate

被引：48
作者：
Zhou, Lingyun [1 ,2 ]
Fan, Jing [1 ]
Shang, Xiaomin [1 ]
Wang, Jianji [1 ]
机构：
[1] Henan Normal Univ, Henan Key Lab Environm Pollut Control, Sch Chem & Environm Sci, Xinxiang 453007, Henan, Peoples R China
[2] Henan Inst Sci & Technol, Coll Resource & Environm, Xinxiang 453007, Henan, Peoples R China
来源：
JOURNAL OF CHEMICAL THERMODYNAMICS | 2013年 / 59卷
基金：
中国国家自然科学基金;
关键词：
CO2; solubility; Ionic liquid; Henry's constant; Pitzer model; 1-n-Butyl-3-methylimidazolium heptafluorobutyrate; CARBON-DIOXIDE SOLUBILITY; PRESSURE PHASE-BEHAVIOR; GAS SOLUBILITY; TEMPERATURE; SPECTROSCOPY; SEPARATIONS; ABSORPTION; SOLVATION; KINETICS; CAPTURE;
D O I：
10.1016/j.jct.2012.11.030
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
Ionic liquids (ILs) are promising in the capture and separation of CO2. In this work, IL 1-n-butyl-3-methylimidazolium heptafluorobutyrate, [C(4)mim][CF3CF2CF2COO], has been synthesized and characterized by H-1, C-13 and F-19 NMR spectra. Solubilities of CO2, H-2, N-2 and O-2 in this IL have been determined at the temperature range from (303.15 to 333.15) K and the pressure up to 8.9 MPa. From these data, the Henry's constant, the standard state solution Gibbs energy, standard state solution enthalpy and standard state solution entropy of these gases in [C(4)mim][CF3CF2CF2COO] were derived and analyzed from molecular interactions. It was shown that the solubility of CO2 is obviously higher than that in [C(4)mim] [CF3COO] and [C(4)mim][CF3SO3] reported in literature, which makes this IL an attractive solvent for gas separation processes. Furthermore, these solubility data were well correlated by Pitzer model. (C) 2012 Elsevier Ltd. All rights reserved.
引用
收藏
页码：28 / 34
页数：7
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