ABSTRACT

Solubility data of carbon dioxide (CO2) in the ionic liquids 1-alkyl-3-methylimidazolium trifluoromethanesulfonate ([Cnmim][TfO]; n = 2, 4, 6, 8) are presented at pressures up to about 40 MPa and at temperatures between (303.85 and 344.55) K. The equilibrium pressure increased very steeply at high CO2 concentrations. The solubility of CO2 in the ionic liquids decreased with an increase in temperature. The CO2 solubility increased with the increase in the alkyl chain length on the cation of the ionic liquids. The phase equilibrium data for the CO2 + ionic liquid systems have been correlated using the Peng-Robinson equation of state.

Compounds

#	Formula	Name
1	CO2	carbon dioxide
2	C7H11F3N2O3S	1-ethyl-3-methylimidazolium trifluoromethanesulfonate
3	C9H15F3N2O3S	1-butyl-3-methylimidazolium trifluoromethanesulfonate
4	C11H19F3N2O3S	1-hexyl-3-methylimidazolium trifluoromethanesulfonate
5	C13H23F3N2O3S	1-octyl-3-methylimidazolium trifluoromethanesulfonate

Datasets

The table above is generated from the ThermoML associated json file (link above). POMD and RXND refer to PureOrMixture and Reaction Datasets. The compound numbers are included in properties, variables, and phases, if specificied; the numbers refer to the table of compounds on the left.
Type	Compound-#	Property	Variable	Phase	Method	#Points
POMD	1 2	Vapor or sublimation pressure, kPa ; Liquid mixture 1	Temperature, K; Liquid mixture 1 Mole fraction - 1; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2	Closed cell (Static) method	19
POMD	1 2	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Liquid Gas	CCELL:UFactor:8	37
POMD	1 3	Vapor or sublimation pressure, kPa ; Liquid mixture 1	Temperature, K; Liquid mixture 1 Mole fraction - 1; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2	Closed cell (Static) method	17
POMD	1 3	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Liquid Gas	CCELL:UFactor:16	49
POMD	1 4	Vapor or sublimation pressure, kPa ; Liquid mixture 1	Temperature, K; Liquid mixture 1 Mole fraction - 1; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2	Closed cell (Static) method	16
POMD	1 4	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Liquid Gas	CCELL:UFactor:16	54
POMD	1 5	Vapor or sublimation pressure, kPa ; Liquid mixture 1	Temperature, K; Liquid mixture 1 Mole fraction - 1; Liquid mixture 1	Liquid mixture 1 Liquid mixture 2	Closed cell (Static) method	21
POMD	1 5	Vapor or sublimation pressure, kPa ; Liquid	Temperature, K; Liquid Mole fraction - 1; Liquid	Liquid Gas	CCELL:UFactor:16	44

Thermodynamics Research Center / ThermoML | Journal of Chemical and Engineering Data

High-Pressure Phase Behavior of Carbon Dioxide with Ionic Liquids: 1-Alkyl-3-methylimidazolium Trifluoromethanesulfonat

Shin, E.-K.[Eun-Kyoung], Lee, B.-C.[Byung-Chul]

ABSTRACT