ABSTRACT

Carbon dioxide solubility in four ionic liquids (ILs) of different families with different cationic anionic groups (tributylmethylphosphonium formate, butyltrimethylammonium bis(trifluoromethyl sulfonyl) imide, 1-methyl-1-propylpyrrolidinium dicyanamide, and 1-ethyl-3-methylimidazolium acetate) at temperature of 298 K and a pressure range from vacuum to 10 bar were studied in this work using state of the art gravimetric sorption experiments. This work provides insight information regarding CO2 solubility for IL IL mixing effect pressures up to 10 bar and at 298 K. Density values were used to calculate molar volume of ionic liquids for further discussions on CO2 solubility-molar volume relationship. Noticeably higher CO2 solubility with IL IL hybridized systems of different family is opening a new window for research on a molecular level by simulations and intellectually designed ILs. Chemisorption behavior has been observed for the ILs that contain acetate-based anions in the structure and relevant discussion is included in this work.

Compounds

#	Formula	Name
1	CO2	carbon dioxide
2	C14H31O2P	tributylmethylphosphonium formate
3	C9H18F6N2O4S2	butyltrimethylammonium bis(trifluoromethylsulfonyl)imide
4	C10H18N4	1-methyl-1-propylpyrrolidinium dicyanamide
5	C8H14N2O2	1-ethyl-3-methylimidazolium acetate
6	C2H6OS	dimethyl sulfoxide

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	7
POMD	3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid		Liquid	Vibrating tube method	1
POMD	4	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	14
POMD	5	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	14
POMD	6	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	15
POMD	1 2	Molality, mol/kg - 1 ; Liquid	Pressure, kPa; Liquid	Temperature, K; Liquid	Liquid Gas	phase equilibration	12
POMD	1 3	Molality, mol/kg - 1 ; Liquid	Pressure, kPa; Liquid	Temperature, K; Liquid	Liquid Gas	phase equilibration	12
POMD	1 4	Molality, mol/kg - 1 ; Liquid	Pressure, kPa; Liquid	Temperature, K; Liquid	Liquid Gas	phase equilibration	12
POMD	1 5	Molality, mol/kg - 1 ; Liquid	Pressure, kPa; Liquid	Temperature, K; Liquid	Liquid Gas	phase equilibration	11
POMD	1 5 3	Molality, mol/kg - 1 ; Liquid	Solvent: Mole fraction - 3; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid Gas	phase equilibration	6
POMD	1 3 4	Molality, mol/kg - 1 ; Liquid	Solvent: Mole fraction - 3; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid Gas	phase equilibration	6
POMD	1 5 4	Molality, mol/kg - 1 ; Liquid	Solvent: Mole fraction - 4; Liquid	Pressure, kPa; Liquid Temperature, K; Liquid	Liquid Gas	phase equilibration	6
POMD	1 2 5	Molality, mol/kg - 1 ; Liquid	Solvent: Mole fraction - 2; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid Gas	phase equilibration	6
POMD	1 2 4	Molality, mol/kg - 1 ; Liquid	Solvent: Mole fraction - 2; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid Gas	phase equilibration	6

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

Carbon Dioxide Solubility in Phosphonium-, Ammonium-, Sulfonyl-, and Pyrrolidinium-Based Ionic Liquids and their Mixtures at Moderate Pressures up to 10 bar

Altamash, T.[Tausif], Haimour, T. S.[Tamara Shabib], Tarsad, M. A.[Mahsa Ali], Anaya, B.[Baraa], Ali, M. H.[Moustafa Hussein], Aparicio, S.[Santiago], Atilhan, M.[Mert]

ABSTRACT