| 초록 |
We measured the CO2 solubility in three different [BETI] anion-based ionic liquids: 1-ethyl-3-methylimidazolium bis(pentafluoroethylsulfonyl)imide ([EMIM][BETI]), 1-butyl-3-methylimidazolium bis(pentafluoroethylsulfonyl)imide ([BMIM][BETI]), and 1-hexyl-3-methylimidazolium bis(pentafluoroethylsulfonyl)imide ([HMIM][BETI]) in the experimental ranges of 0.08–29.27 MPa and 303.15–373.15 K. In this paper, we report the CO2 solubility in three [BETI] anion-based ILs under various experimental conditions and compare the effect of three different cations, [HMIM], [BMIM], and [EMIM]. We determined the CO2 solubility by measuring the bubble-point pressure for a fixed CO2 mole fraction, and the order of intensity for CO2 absorption ability was [HMIM][BETI] ＞ [BMIM][BETI] ＞ [EMIM][BETI]. The Peng-Robinson equation of state (PR-EoS), the conventional van der Waals one fluid mixing rule, and the modified Lydersen-Joback-Reid method were used to correlate. The overall average absolute deviations of pressure (AAD-P) were 0.0204, 0.0275, and 0.0227 for each systems, respectively |
