Thermodynamic assessment of the KCl-K2CO3-NaCl-Na2CO3 system

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Abstract

Phase equilibria and thermodynamic properties of the KCl-K2CO3-NaCl-Na2CO3 system were analyzed on the basis of the thermodynamic evaluation of the KCl-NaCl,KCl-K2CO3,NaCl-Na2CO3,K2CO3-Na2CO3 and KCl-K2CO3-NaCl-Na2CO3 systems. The Gibbs energies of individual phases was approximated by two-sublattice models for ionic liquids and crystals. Most of the experimental information was well described by the present set of thermodynamic parameters. The lowest monovariant eutectic temperature in the KCl-NaCl-Na2CO3 system is located at 573 {ring operator}C, with a composition of XNa2CO3=0.31,XKCl=0.35 and XNaCl=0.34.

Original languageEnglish
Pages (from-to)155-163
Number of pages9
JournalCalphad: Computer Coupling of Phase Diagrams and Thermochemistry
Volume31
Issue number2
DOIs
Publication statusPublished - 2007 Jun 1

Keywords

  • CALPHAD
  • Ionic solution
  • Phase diagram
  • Salt
  • Thermodynamic

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Computer Science Applications

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