Solubilities of Carbon Dioxide in Eutectic Mixtures of Choline Chloride and Dihydric Alcohols

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• 作者：Yanfei Chen ; Ning Ai ; Guihua Li ; Haifang Shan ; Yanhong Cui ; Dongshun Deng
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2014
• 出版时间：April 10, 2014
• 年：2014
• 卷：59
• 期：4
• 页码：1247-1253
• 全文大小：273K
• 年卷期：v.59,no.4(April 10, 2014)
• ISSN：1520-5134

文摘

The solubilities of CO₂ in eutectic mixtures containing choline chloride and dihydric alcohols (including 1,4-butanediol, 2,3-butanediol, and 1,2-propanediol) with a molar ratio of choline chloride to dihydric alcohol of 1:3 and 1:4 were measured at 293.15 K, 303.15 K, 313.15 K, and 323.15 K under pressures up to 600.0 kPa using an isochoric saturation method. Henry鈥檚 constant and the dissolution Gibbs free energy, enthalpy, and entropy changes of CO₂ solvation were obtained by correlating the experimental data. The solubility of CO₂ in the mixtures increased linearly with the increasing pressure or the decreasing temperature. The enthalpies of solution were negative at all conditions.