Modeling electrolyte solutions with the extended universal quasichemical (UNIQUAC) model

2005 ◽  
Vol 77 (3) ◽  
pp. 531-542 ◽  
Author(s):  
Kaj Thomsen
Keyword(s):  
Thermal Properties ◽  
Liquid Phase ◽  
Phase Equilibria ◽  
Thermodynamic Model ◽  
Specific Interaction ◽  
Electrolyte Solutions ◽  
Excess Function ◽  
Uniquac Model ◽  
Solid Liquid ◽  
Standard States

The extended universal quasichemical (UNIQUAC) model is a thermodynamic model for solutions containing electrolytes and nonelectrolytes. The model is a Gibbs excess function consisting of a Debye–Hückel term and a standard UNIQUAC term. The model only requires binary ion-specific interaction parameters. A unique choice of standard states makes the model able to reproduce solid–liquid, vapor–liquid, and liquid–liquid phase equilibria as well as thermal properties of electrolyte solutions using one set of parameters.

Effect of pressure on the solid-liquid phase equilibria in (water + sodium sulfate) system

1992 ◽  
Vol 76 ◽  
pp. 163-173 ◽  
Author(s):  
Y. Tanaka ◽  
S. Hada ◽  
T. Makita ◽  
M. Moritoki
Keyword(s):  
Liquid Phase ◽  
Phase Equilibria ◽  
Sodium Sulfate ◽  
Effect Of Pressure ◽  
Solid Liquid

Solid-liquid Phase Equilibria of U(VI) in NaCl Solutions

1998 ◽  
Vol 62 (2) ◽  
pp. 245-263 ◽  
Author(s):  
P. Dı́az Arocas ◽  
B. Grambow
Keyword(s):  
Liquid Phase ◽  
Phase Equilibria ◽  
Solid Liquid

scholarly journals Thermodynamic model for solution behavior and solid-liquid equilibrium in Na-Al(III)-Fe(III)-Cr(III)-Cl-H2O system at 25°C

2018 ◽  
Vol 5 (1) ◽  
pp. 6-16
Author(s):  
Laurent André ◽  
Christomir Christov ◽  
Arnault Lassin ◽  
Mohamed Azaroual
Keyword(s):  
Thermodynamic Model ◽  
Specific Interaction ◽  
Soil Formation ◽  
Ternary Systems ◽  
Industrial Applications ◽  
Mineral Dissolution ◽  
Solution Behavior ◽  
Data Limitations ◽  
Pitzer Formalism ◽  
Solid Liquid

AbstractThe knowledge of the thermodynamic behavior of multicomponent aqueous electrolyte systems is of main interest in geo-, and environmental-sciences. The main objective of this study is the development of a high accuracy thermodynamic model for solution behavior, and highly soluble M(III)Cl3(s) (M= Al, Fe, Cr) minerals solubility in Na-Al(III)-Cr(III)-Fe(III)-Cl-H2O system at 25°C. Comprehensive thermodynamic models that accurately predict aluminium, chromium and iron aqueous chemistry and M(III) mineral solubilities as a function of pH, solution composition and concentration are critical for understanding many important geochemical and environmental processes involving these metals (e.g., mineral dissolution/alteration, rock formation, changes in rock permeability and fluid flow, soil formation, mass transport, toxic M(III) remediation). Such a model would also have many industrial applications (e.g., aluminium, chromium and iron production, and their corrosion, solve scaling problems in geothermal energy and oil production). Comparisons of solubility and activity calculations with the experimental data in binary and ternary systems indicate that model predictions are within the uncertainty of the data. Limitations of the model due to data insufficiencies are discussed. The solubility modeling approach, implemented to the Pitzer specific interaction equations is employed. The resulting parameterization was developed for the geochemical Pitzer formalism based PHREEQC database.

Solid–liquid phase equilibria in the aqueous ternary system Li2SO4+LiBO2+H2O at T=288.15 and 298.15K

2014 ◽  
Vol 371 ◽  
pp. 121-124 ◽  
Author(s):  
D.L. Gao ◽  
Q. Wang ◽  
Y.F. Guo ◽  
X.P. Yu ◽  
S.Q. Wang ◽  
...  
Keyword(s):  
Liquid Phase ◽  
Ternary System ◽  
Phase Equilibria ◽  
Solid Liquid
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