ABSTRACT

In this work, the solubility of CO2 in sulfonate ionic liquids (ILs), such as trihexyl (tetradecyl) phosphonium dodecylbenzenesulfonates ([P6,6,6,14][C12H25PhSO3]) and trihexyl (tetradecyl) phosphonium mesylate ([P6,6,6,14][MeSO3]), was determined at temperatures ranging from (305 to 325) K and pressures ranging from (4 to 9) MPa. It was found that the difference of the solubility of CO2 in two kinds of sulfonate ILs is not dramatic on the basis of molality. The solubility of CO2 in [P6,6,6,14][MeSO3] is higher than that in [P6,6,6,14][C12H25PhSO3]. The solubility data were correlated by means of the extended Henry s law, and the thermodynamic functions, such as the standard enthalpy, standard Gibbs free energy, and standard entropy, were obtained. The Henry s law constant for CO2 in all the investigated ionic liquids increases with increasing temperature.

Compounds

#	Formula	Name
1	CO2	carbon dioxide
2	C50H97O3PS	trihexyl(tetradecyl)phosphonium dodecyl-benzenesulfonate
3	C33H71O3PS	trihexyltetradecylphosphonium methanesulfonate

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	Constraint	Phase	Method	#Points
POMD	1 2	Molality, mol/kg - 1 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid Gas	gravimetric method	28
POMD	1 3	Molality, mol/kg - 1 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid Gas	gravimetric method	28

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

Solubility of CO2 in Sulfonate Ionic Liquids at High Pressure

Zhang, S.[Suoajiang], Chen, Y.[Yuhuan], Ren, R. X.-F.[Rex X.-F.], Zhang, Y.[Yanqiang], Zhang, J.[Jianmin], Zhang, X.[Xiangping]

ABSTRACT