High-Pressure Phase Behavior of Carbon Dioxide in Ionic Liquids: 1-Alkyl-3-methylimidazolium Trifluoromethanesulfonate
Phase equilibrium data of carbon dioxide (CO2) in the ionic liquids (ILs) 1-alkyl-3- methylimidazolium trifluoromethanesulfonate (Cn-mimTfO, n =2, 4, 6, 8) are presented at high-pressures up to about 45 MPa and at temperatures between 298.15 K and 343.15 K. CO2 gave very high solubilities in the ILs at lower pressure, while the equilibrium pressure increased very steeply at higher CO2 concentrations. The solubility of CO2 in the ILs decreased with an increase in temperature. The increase in the alkyl chain length on the cation of the TfO anion based ILs increased the CO2 solubility. In the modeling work, the critical properties and acentric factors of the ILs were estimated using the Jobacks group contribution method, and then the Peng-Robinson equation of state was used to calculate the phase behavior.
solubility ionic liquid carbon dioxide 1-alkyl-3-methylimidazolium trifluoromethane-sulfonate Peng-Robinson equation of state
Byung-Chul Lee Eun-Kyoung Shin
Department of Chemical Engineering and Nano-Bio Technology, Hannam University 461-6 Jeonmin-dong, Yuseong-gu, Daejeon 305-811, Korea
国际会议
The 5th International Conference on Separation Science and Technology(第五届国际分离科学与技术会议)
北京
英文
2007-10-14（万方平台首次上网日期，不代表论文的发表时间）