ABSTRACT

In this work, experimental values of gas solubility of hydrofluorocarbons (CHF3, CH2F2 and CH3F) in three room-temperature ionic liquids (RTILs) were determined within the temperature range 288 K to 308 K and at atmospheric pressure. The RTILs used were trihexyltetradecylphosphonium chloride ([P6,6,6,14][Cl]), tributyl(methyl)phosphonium methylsulfate ([P4,4,4,1][C1SO4]), and tributyl(ethyl)phosphonium diethylphosphate ([P4,4,4,2][(C2)2PO4]). The data gathered have been modelled using two approaches: the Cubic plus Association equation of state (CPA EoS) and the regular-solution theory (RST). The experimental measurements were then discussed critically and the modelling results compared.

Compounds

#	Formula	Name
1	C32H68ClP	trihexyl(tetradecyl)phosphonium chloride
2	C14H33O4PS	tributylmethylphosphonium methyl sulfate
3	C18H42O4P2	tributylethylphosphonium diethylphosphate
4	CH3F	fluoromethane
5	CH2F2	difluoromethane
6	CHF3	trifluoromethane

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	4 1	Mole fraction - 4 ; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid Gas	Volumetric	5
POMD	5 1	Mole fraction - 5 ; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid Gas	Volumetric	5
POMD	6 1	Mole fraction - 6 ; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid Gas	Volumetric	5
POMD	4 2	Mole fraction - 4 ; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid Gas	Volumetric	5
POMD	5 2	Mole fraction - 5 ; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid Gas	Volumetric	5
POMD	6 2	Mole fraction - 6 ; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid Gas	Volumetric	5
POMD	4 3	Mole fraction - 4 ; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid Gas	Volumetric	5
POMD	5 3	Mole fraction - 5 ; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid Gas	Volumetric	5
POMD	6 3	Mole fraction - 6 ; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid Gas	Volumetric	5

Thermodynamics Research Center / ThermoML | Journal of Chemical Thermodynamics

Solubility of hydrofluorocarbons in phosphonium-based ionic liquids: Experimental and modelling study

Sousa, J. M. M. V.[Jose M.M.V.], Granjo, J. F. O.[Jose F.O.], Queimada, A. J.[Antonio J.], Ferreira, A. G. M.[Abel G.M.], Oliveira, N. M. C.[Nuno M.C.], Fonseca, I. M. A.[Isabel M.A.]

ABSTRACT