In this work, the solubility of sodium chloride was investigated by using a continuous flow method over the temperature and pressure ranges of (568 to 598) K and (10 to 25) MPa, respectively. The results showed that the solubility of sodium chloride increased with increasing of the water density. In general, over the low-density ranges, the increase of solubility is not significant. Whereas, over the high-density ranges, the solubility greatly increases with density. The experimental solubility data were also correlated with seven empirical and semi-empirical models (Empirical, Enthalpy, Cp-, Flory-Huggins, Ionization, Second-order polynomial and Third-order polynomial models). The correlated results indicated that Second-order polynomial model provided the best fit. The solubility data of sodium chloride in sub-, near- and supercritical water from this work and literature were collected with a view to evaluating the correlative and predictive capability of these models over a wide range. Enthalpy model gave the best correlated and predicted result with respect to the solubilities in near- and supercritical water. In whole region, Third-order polynomial model was proved is the most suitable model. Moreover, the corrosion behavior of apparatus was characterized using SEM/EDS, XRD and XPS methods and the possible corrosion mechanism is also briefly discussed.
Compounds
#
Formula
Name
1
ClNa
sodium chloride
2
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
2
Molality, mol/kg - 1 ; Fluid (supercritical or subcritical phases)
Temperature, K; Fluid (supercritical or subcritical phases)
Pressure, kPa; Fluid (supercritical or subcritical phases)