ABSTRACT

Two low viscous ionic liquids (ILs), 1-(2-hydroxyethyl)-3-methyl-imidazolium dicyanamide ([C2OHmim][DCA]) and 1-butyl-3-methylimidazolium ([Bmim][DCA]) were selected to mixed with aqueous 30 wt% monoethanolamine (MEA) for CO2 absorption. The solubility of CO2 in the aqueous mixtures of MEA + ILs was measured over a range of CO2 partial pressure of 10 to 800 kPa and ILs concentrations from 10 to 50 wt% at 313.15 K and 333.15 K. Correlations of solubility as a function of CO2 partial pressure have been conducted with deviation of +-1.5%. Moreover, the density and viscosity of pure ILs and MEA + ILs + H2O systems with different IL mass fractions were measured at temperature varying from 293.15 to 333.15 K.

Compounds

#	Formula	Name
1	C8H11N5O	3-(2-hydroxyethyl)-1-methyl-1H-imidazol-3-ium dicyanoazanide
2	C10H15N5	1-butyl-3-methylimidazolium dicyanamide
3	C2H7NO	2-aminoethan-1-ol
4	H2O	water

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	5
POMD	1	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Falling or rolling sphere viscometry	5
POMD	2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	5
POMD	2	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Falling or rolling sphere viscometry	5
POMD	3	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	5
POMD	3	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Falling or rolling sphere viscometry	5
POMD	3 4 1	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mass fraction - 3; Liquid Mass fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	25
POMD	3 4 1	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Mass fraction - 3; Liquid Mass fraction - 1; Liquid	Pressure, kPa; Liquid	Liquid	Falling or rolling sphere viscometry	25
POMD	3 4 2	Mass density, kg/m3 ; Liquid	Temperature, K; Liquid Mass fraction - 3; Liquid Mass fraction - 2; Liquid	Pressure, kPa; Liquid	Liquid	Vibrating tube method	25
POMD	3 4 2	Viscosity, Pa*s ; Liquid	Temperature, K; Liquid Mass fraction - 3; Liquid Mass fraction - 2; Liquid	Pressure, kPa; Liquid	Liquid	Falling or rolling sphere viscometry	25

Thermodynamics Research Center / ThermoML | Fluid Phase Equilibria

Solubility of CO2 in aqueous mixtures of monoethanolamine and dicyanamide-based ionic liquids

Xu, F.[Fan], Gao, H.[Hongshuai], Dong, H.[Haifeng], Wang, Z.[Zhanli], Zhang, X.[Xiangping], Ren, B.[Baozeng], Zhang, S.[Suojiang]

ABSTRACT