ABSTRACT

The solubility of hydrogen sulphide in three ionic liquids, viz. 1-hexyl-3-methylilmidazolium hexafluorophosphate ([hmim][PF6]), 1-hexyl-3-methylimidazolium tetrafluoroborate ([hmim][BF4]), and 1-hexyl-3- methylimidazolium bis(trifluoromethanesulfonyl)imide ([hmim][Tf2N]), at temperatures ranging from 303.15 K to 343.15 K and pressures up to 1.1 MPa were determined. The solubility values were correlated using the Krichevsky Kasarnovsky equation and Henry s constants were obtained at different temperatures. Partial molar thermodynamic functions of solvation such as standard Gibbs free energy, enthalpy, and entropy were calculated from the solubility results. Comparison of the values obtained show that the solubility of H2S in these three ionic liquids was in the sequence: [hmim][BF4] greater than [hmim][PF6] [hmim][Tf2N].

Compounds

#	Formula	Name
1	H2S	hydrogen sulfide
2	C10H19F6N2P	1-hexyl-3-methylimidazolium hexafluorophosphate
3	C10H19BF4N2	1-hexyl-3-methylimidazolium tetrafluoroborate
4	C12H19F6N3O4S2	1-hexyl-3-methylimidazolium bis[(trifluoromethyl)sulfonyl]imide

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	Henry's Law constant (mole fraction scale), kPa - 1 ; Liquid	Temperature, K; Liquid	Mole fraction - 1; Liquid	Liquid Gas	static method	5
POMD	1 2	Mole fraction - 1 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid Gas	static method	34
POMD	1 3	Henry's Law constant (mole fraction scale), kPa - 1 ; Liquid	Temperature, K; Liquid	Mole fraction - 1; Liquid	Liquid Gas	static method	5
POMD	1 3	Mole fraction - 1 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid Gas	static method	33
POMD	1 4	Henry's Law constant (mole fraction scale), kPa - 1 ; Liquid	Temperature, K; Liquid	Mole fraction - 1; Liquid	Liquid Gas	static method	5
POMD	1 4	Mole fraction - 1 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid Gas	static method	30

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Solubility of H2S in ionic liquids [hmim][PF6], [hmim][BF4], and [hmim][Tf2N]

Rahmati-Rostami, M.[Mahboubeh], Ghotbi, C.[Cyrus], Hosseini-Jenab, M.[Masih], Ahmadi, A. N.[Amir Naser]

ABSTRACT