Thermodynamics and Molecular-Scale Phenomena

A general dynamic model for multiphase electrolytic systems

  1. C. Coussine1,
  2. J. -P. Serin1,
  3. P. Cézac1,
  4. F. Contamine1,
  5. J.-M. Reneaume1,
  6. C. Coussine2,*,
  7. K. Dubourg2,
  8. A. Knorst2,
  9. J. Cambar2

Article first published online: 24 FEB 2012

DOI: 10.1002/aic.13758

Issue

AIChE Journal

AIChE Journal

Volume 58, Issue 12, pages 3832–3840, December 2012

Additional Information

How to Cite

Coussine, C., Serin, J. .-P., Cézac, P., Contamine, F., Reneaume, J.-M., Coussine, C., Dubourg, K., Knorst, A. and Cambar, J. (2012), A general dynamic model for multiphase electrolytic systems. AIChE J., 58: 3832–3840. doi: 10.1002/aic.13758

Author Information

  1. 1

    Univ Pau & Pays Adour, LaTEP EA 1932 - Laboratoire de Thermique, Energétique et Procédés, ENSGTI - Rue Jules Ferry, BP 7511 Pau, F-64075, France

  2. 2

    Institut du thermalisme, Université Victor Segalen Bordeaux 2, 8 rue Sainte Ursule, 40100 Dax, France

*Institut du thermalisme, Université Victor Segalen Bordeaux 2, 8 rue Sainte Ursule, 40100 Dax, France

Publication History

  1. Issue published online: 8 NOV 2012
  2. Article first published online: 24 FEB 2012
  3. Accepted manuscript online: 24 JAN 2012 04:43PM EST
  4. Manuscript Revised: 13 JAN 2012
  5. Manuscript Received: 26 SEP 2011

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Keywords:

  • thermodynamics;
  • electrolytes;
  • modeling;
  • dynamic;
  • salts

Abstract

The study and characterization of aqueous solutions are becoming an important research topic because of their central role in many processes. The modeling of these solutions is complicated by different factors: the important number of ionic and nonionic species, the nonideality of aqueous solutions, the appearance and disappearance of thermodynamic phases (solid, vapor) depending on operating conditions. This article presents a general model in dynamic state of aqueous electrolytic system involving liquid, vapor, and solid phases. The mathematical formulation includes: physical and chemical equilibria, mass and energy balances, electroneutrality equation and evaporation equation. The set of equations is solved by the Gear's method. The model is validated by the comparison between modeled results (activity coefficients, solubility, evaporite sequence) and experimental data. One of the purposes of the model will be the simulation of a production process of salt crystals and waters concentrated in minerals of interest. © 2012 American Institute of Chemical Engineers AIChE J, 2012

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