ABSTRACT

The solubilities of CO2 in eutectic mixtures containing choline chloride and dihydric alcohols (including 1,4-butanediol, 2,3-butanediol, and 1,2-propanediol) with a molar ratio of choline chloride to dihydric alcohol of 1:3 and 1:4 were measured at 293.15 K, 303.15 K, 313.15 K, and 323.15 K under pressures up to 600.0 kPa using an isochoric saturation method. Henry s constant and the dissolution Gibbs free energy, enthalpy, and entropy changes of CO2 solvation were obtained by correlating the experimental data. The solubility of CO2 in the mixtures increased linearly with the increasing pressure or the decreasing temperature. The enthalpies of solution were negative at all conditions.

Compounds

#	Formula	Name
1	C5H14ClNO	choline chloride
2	C4H10O2	1,4-butanediol
3	C4H10O2	2,3-butanediol
4	C3H8O2	1,2-propanediol
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	1 2 5	Mole fraction - 5 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid Amount ratio of solute to solvent - 1; Liquid		Liquid Gas	Pressure or Change on Dissolution	40
POMD	1 5 3	Mole fraction - 5 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid Amount ratio of solute to solvent - 1; Liquid		Liquid Gas	Pressure or Change on Dissolution	40
POMD	4 1 5	Mole fraction - 5 ; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid Amount ratio of solute to solvent - 1; Liquid		Liquid Gas	Pressure or Change on Dissolution	40
POMD	4 1	Mass density, kg/m3 ; Liquid	Amount ratio of solute to solvent - 1; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Pycnometric method	8
POMD	1 2	Mass density, kg/m3 ; Liquid	Amount ratio of solute to solvent - 1; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Pycnometric method	8
POMD	1 3	Mass density, kg/m3 ; Liquid	Amount ratio of solute to solvent - 1; Liquid Temperature, K; Liquid	Pressure, kPa; Liquid	Liquid	Pycnometric method	8

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

Solubilities of Carbon Dioxide in Eutectic Mixtures of Choline Chloride and Dihydric Alcohols

Chen, Y.[Yanfei], Ai, N.[Ning], Li, G.[Guihua], Shan, H.[Haifang], Cui, Y.[Yanhong], Deng, D.[Dongshun]

ABSTRACT