ABSTRACT

The density and viscosity of 1-butyl-3-methylimidazolium hexafluorophosphate ([bmim][PF6]), 1-butyl-3-methylimidazolium bis(trifluoromethanesulfonyl)amide ([bmim][TFSA]), and their mixtures were measured at 313.15 K and at atmospheric pressure. Furthermore, the CO2 solubilities and the CO2-saturated densities of [bmim][PF6], [bmim][TFSA], and their mixtures were determined at 313.15 K and pressures up to 8.5 MPa using a volume-variable high-pressure apparatus. The ionic liquid mixtures were prepared at the mole fractions of [bmim][PF6] of 0.25, 0.50, and 0.75. The CO2 solubilities in both the mole fraction and molarity scales increased with the composition of [bmim][TFSA] and the pressure-mole fraction curves showed a typical behavior for the physical absorption. The CO2-saturated density of the ionic liquid phase decreased with increasing the composition of [bmim][PF6] and the pressure. Excess volumetric properties were calculated from the pressure-volume-mole fraction relations.

Compounds

#	Formula	Name
1	C8H15F6N2P	1-butyl-3-methylimidazolium hexafluorophosphate
2	C10H15F6N3O4S2	1-butyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide
3	CO2	carbon dioxide

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	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	1	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Concentric cylinders viscometry	1
POMD	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	2	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Concentric cylinders viscometry	1
POMD	3	Mass density, kg/m3 ; Gas	Pressure, kPa; Gas	Temperature, K; Gas	Gas	Vibrating tube method	45
POMD	1 2	Mass density, kg/m3 ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Vibrating tube method	3
POMD	1 2	Viscosity, Pa*s ; Liquid	Mole fraction - 1; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid	Concentric cylinders viscometry	3
POMD	1 2 3	Mole fraction - 3 ; Liquid	Solvent: Mole fraction - 1; Liquid Pressure, kPa; Liquid	Temperature, K; Liquid	Liquid Gas	Phase equilibration	45
POMD	1 2 3	Mass density, kg/m3 ; Liquid	Solvent: Mole fraction - 1; Liquid Pressure, kPa; Liquid Mole fraction - 3; Liquid	Temperature, K; Liquid	Liquid	Vibrating tube method	45
POMD	1 3	Vapor or sublimation pressure, kPa ; Liquid	Mole fraction - 3; Liquid	Temperature, K; Liquid	Liquid Gas	Closed cell (Static) method	9
POMD	1 3	Mass density, kg/m3 ; Liquid	Pressure, kPa; Liquid Mole fraction - 3; Liquid	Temperature, K; Liquid	Liquid	Vibrating tube method	9
POMD	2 3	Vapor or sublimation pressure, kPa ; Liquid	Mole fraction - 3; Liquid	Temperature, K; Liquid	Liquid Gas	Closed cell (Static) method	9
POMD	2 3	Mass density, kg/m3 ; Liquid	Pressure, kPa; Liquid Mole fraction - 3; Liquid	Temperature, K; Liquid	Liquid	Vibrating tube method	9

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

Density, Viscosity, and CO2 Solubility in the Ionic Liquid Mixtures of [bmim][PF6] and [bmim][TFSA] at 313.15 K

Kodama, Daisuke, Sato, Kayoko, Watanabe, Masaki, Sugawara, Toshiya, Makino, Takashi, Kanakubo, Mitsuhiro

ABSTRACT