Abstract
A rational exploitation of salt systems, for industrial or fundamental application, requires reliable solubility data and the determination of the sequence of crystallization during evaporation or cooling of a brine, the calculation of yield, recycling etc. It is based on convenient fitting equations allowing the calculation of solubilities in a large range of temperature and composition. The water-salt systems involving stoichiometric solid phases can be described in totality with a semi- empirical model deriving from the thermodynamic conditions of equilibrium. The model complies with all thermodynamic constraints of the system and requires a small number of adjustable coefficients. The same procedure can be used for the calculation of a complex system and included sub-systems (binary, ternary…). The model is applied to the ternary system NaCl-KCl-H2O.
Résumé
L’exploitation rationnelle d’un système salin, à finalité industrielle ou fondamentale, nécessite l’utilisation de données fiables et la détermination de la séquence de cristallisation d’une saumure au cours d’une évaporation ou d’un refroidissement, le calcul des rendements, des recyclages etc. Elle est basée sur l’utilisation d’équations de lissage permettant le calcul des solubilités dans un domaine étendu de température et de composition. Les systémes eau-sels faisant intervenir des phases stoechiométriques peuvent être décrits en totalité à partir d’un modèle semi-empirique traduisant les conditions thermodynamiques de l’équilibre. Le modèle, qui respecte les contraintes thermodynamiques est appliqué au système ternaire NaCl-KCl-H20.
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© 1998 Springer-Verlag Berlin Heidelberg
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Cohen-Adad, R., Cohen-Adad, MT., Chehimi, D., Marrouche, A. (1998). Model for the Critical Evaluation of Solubility Data in Salt Systems. In: Caliste, JP., Truyol, A., Westbrook, J.H. (eds) Thermodynamic Modeling and Materials Data Engineering. Data and Knowledge in a Changing World. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-72207-3_10
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DOI: https://doi.org/10.1007/978-3-642-72207-3_10
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