| 초록 |
The solubility of CO2 in ionic liquids to compare the different of having oxygen ion, 1-Ethyl-3-metylimidazolium methane sulfate ([c2mim][SO3CH3]), 1-Ethyl-3methyllimidazolium methyl sulfonate ([c2mim][SO4CH3]) was measured by using an equilibrium apparatus equipped with a variable-volume view cell. The solubility of CO2 was determined by measuring the bubble point pressure or cloud point pressure at the temperature ranges from 303.15 to 373.15 K in 10 K intervals. Also, the measured data were correlated with the PR-EoS incorporated with the conventional van der Waals one fluid mixing rule. The critical properties of ionic liquids were estimated using the modified Lydersen-Joback-Reid method. As a result, ([c2mim][SO4CH3]) has higher CO2 solubility than ([c2mim][SO3CH3]). This means that the oxygen ion affects the solubility. From this result, it is concluded that the oxygen ion enhances the CO2 solubility in ionic liquid. |
