ABSTRACT

The solubility of carbon dioxide in three bis(fluorosulfonyl)imide-based ionic liquids: N-propyl-n-methyl-piperidinium bis(fluorosulfonyl)imide ([p(3)mpip][FSI]), N-propyl- n-methyl-pyrrolidinium bis(fluorosulfonyl)imide ([p(3)mpyrr][FSI])) and N-propyl- n-methyl-n,n-dimethyl-ammonium bis(fluorosulfonyl)imide ([N4441][FSI]) was measured at (298.15, 313.15, and 343.15) K and pressures up to about 2 MPa. The Henry's law constants for CO2 in the three ILs, ([p(3)mpip][FSI], [p(3)mpyrr][FSI] and [N4441][FSI]) at 298 K are (4.1, 4.0, and 3.8) MPa respectively, indicating the negligible effect of change of cation precursors on CO2 solubility. Solubility of CO2 in the present ILs with [FSI] anion is comparable with those in the ILs containing a more fluorinated common anion, [Tf2N]. The solubility data were correlated well the Soave-Redlich-Kwong equation of state (SRK-EoS).

Compounds

#	Formula	Name
1	C8H15F6N2P	1-butyl-3-methylimidazolium hexafluorophosphate
2	C9H20F2N2O4S2	1-methyl-1-propylpiperidinium bis(fluorosulfonyl)imide
3	C8H18F2N2O4S2	1-methyl-1-propylpyrrolidinium bis(fluorosulfonyl)amide
4	C8H20F2N2O4S2	N,N-diethyl-N-methyl-N-propylammonium bis(fluorosulfonyl)imide
5	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	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	16
POMD	3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	16
POMD	4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	16
POMD	5 2	Mole fraction - 5 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid Gas	Gravimetric Microbalance	36
POMD	5 3	Mole fraction - 5 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid Gas	Gravimetric Microbalance	36
POMD	5 4	Mole fraction - 5 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid Gas	Gravimetric Microbalance	36
POMD	5 1	Mole fraction - 5 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid Gas	Gravimetric Microbalance	18

Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Effect of cation on the solubility of carbon dioxide in three bis(fluorosulfonyl)imide low viscosity ([FSI]) ionic liquids

Tagiuri, A.[Ali], Sumon, K. Z.[Kazi Z.], Henni, A.[Amr]

ABSTRACT