An Equation of State for Nonaqueous Electrolyte Solutions

Zheng Han

The Laboratory of Molecular and Materials Simulation, Department of Chemical Engineering, College of Chemical Engineering, Beijing University of Chemical Technology, Beijing, China.

DOI: 10.4236/aces.2012.24061                

Abstract

A two parameters equation of state (EOS) for nonaqueous electrolyte solutions system has been developed. The equation is in terms of Helmholtz free energy and incorporated with results of low density expansion of non-primitive mean spherical approximation. The EOS was tested for experimental data reported in literatures of 9 nonaqueous single electrolyte solutions of which the temperature was 298.15 K, and it also has a good predictive capability for nonaqueous electrolyte solutions at different temperature in this work. The comparisons with EOSs published earlier by other researchers in literatures are carried out in detail.

Keywords

EOS; Nonaqueous; Electrolyte Solutions

Conflicts of Interest

The authors declare no conflicts of interest.

References

[1]	A. Anderko, P. Wang and M. Rafal, “Electrolyte Solutions: From Thermodynamic and Transport Property Models to the Simulation of Industrial Processes,” Fluid Phase Equilibria, Vol. 194-197, 2002, pp. 123-142. doi:10.1016/S0378-3812(01)00645-8
[2]	J. R. Loehe and M. D. Donohue, “Recent Advances in Modeling Thermodynamic Properties of Aqueous Strong Electrolyte Systems,” AIChE Journal, Vol. 43, No. 1, 1997, pp. 180-195. doi:10.1002/aic.690430121
[3]	Y. Liu and S. Watanairi, Chemical Engineering Progress, Vol. 95, 1999, pp. 25-42.
[4]	H. L. Friedman, “Electrolyte Solutions at Equilibrium,” Annual Review of Physical Chemistry, Vol. 32, 1981, pp. 179-204. doi:10.1146/annurev.pc.32.100181.001143
[5]	K. S. Pitzer, “Thermodynamics of Electrolytes. I. Theoretical Basis and General Equations,” The Journal of Physical Chemistry, Vol. 77, No. 2, 1973, pp. 268-277. doi:10.1021/j100621a026
[6]	K. S. Pitzer and G. Mayorga, “Thermodynamics of Electrolytes. II. Activity and Osmotic Coefficients for Strong Electrolytes with One or Both Ions Univalent,” The Journal of Physical Chemistry, Vol. 77, No. 19, 1973, pp. 2300-2308. doi:10.1021/j100638a009
[7]	J. A. Barker and D. Henderson, “What Is ‘Liquid’? Understanding the States of Matter,” Reviews of Modern Physics, Vol. 48, No. 4, 1976, pp. 587-671. doi:10.1103/RevModPhys.48.587
[8]	J. Y. Zuo, D. Zhang and W. Furst, “Extension of the Electrolyte EOS of Fürst and Renon to Mixed Solvent Electrolyte Systems,” Fluid Phase Equilibria, Vol. 175, No. 1-2, 2000, pp. 285-310. doi:10.1016/S0378-3812(00)00463-5
[9]	Y. X. Zuo and W. Furst, “Prediction of Vapor Pressure for Nonaqueous Electrolyte Solutions Using an Electrolyte Equation of State,” Fluid Phase Equilibria, Vol. 138, No. 1-2, 1997, pp. 87-104. doi:10.1016/S0378-3812(97)00145-3
[10]	T. J. Chou and A. Tanioka, “A Vapor Pressure Model for Aqueous and Nonaqueous Solutions of Single and Mixed Electrolyte Systems,” Fluid Phase Equilibria, Vol. 137, No. 1-2, 1997, pp. 17-32. doi:10.1016/S0378-3812(97)00091-5