ABSTRACT

Water activities of the CsCl-MgCl2-H2O ternary system and its sub-binary systems at 323.15 K were elaborately measured by an isopiestic method. Moreover, the solubility of the CsCl-MgCl2-H2O system at 323.15 K was also measured by Flow-Cloud-Point method. A Pitzer model was selected to correlate the water activity and solubility data measured in this work. The binary parameters for the CsCl-H2O system at 323.15 K were obtained by fitting the measured water activities for this binary system. The calculated water activity and solubility isotherms for the CsCl-MgCl2-H2O system at 323.15 K, with binary parameters only, deviated from the experimental values. This means that it is insufficient with binary parameters only to represent the thermodynamic properties and to calculate the solubility isotherms of this ternary system at 323.15 K. The calculated solubility isotherms with binary and ternary parameters, obtained by fitting the measured water activity, also deviated from experimental values. New set of reasonable ternary parameters for CsCl-MgCl2-H2O system were obtained by fitting water activity and solubility data measured in this work. The calculated solubility isotherms with this set of parameters are consistent with experimental values.

Compounds

#	Formula	Name
1	Cl2Mg	magnesium chloride
2	ClCs	cesium chloride
3	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	2 1 3	(Relative) activity - 3 ; Liquid	Molality, mol/kg - 2; Liquid Molality, mol/kg - 1; Liquid	Temperature, K; Liquid	Liquid Gas	ISOPIE	20
POMD	2 1 3	Molality, mol/kg - 1 ; Liquid	Molality, mol/kg - 2; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid Crystal of intercomponent compound 1	flow-cloud-point method	6
POMD	2 1 3	Molality, mol/kg - 1 ; Liquid	Molality, mol/kg - 2; Liquid	Temperature, K; Liquid Pressure, kPa; Liquid	Liquid Crystal - 2	flow-cloud-point method	4
POMD	1 3	(Relative) activity - 3 ; Liquid	Molality, mol/kg - 1; Liquid	Temperature, K; Liquid	Liquid Gas	ISOPIE	3
POMD	2 3	(Relative) activity - 3 ; Liquid	Molality, mol/kg - 2; Liquid	Temperature, K; Liquid	Liquid Gas	ISOPIE	5

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

Water Activity and Solubility Measurements and Model Simulation of the CsCl-MgCl2-H2O Ternary System at 323.15 K

Guo, Lijiang, Tu, Lanying, Wang, Yaxiao, Li, Jianqiang

ABSTRACT