Solid–liquid equilibria in mixtures of molten salt hydrates for the design of heat storage materials

  • Voigt W
  • Zeng D
  • 17

    Readers

    Mendeley users who have this article in their library.
  • 31

    Citations

    Citations of this article.

Abstract

Enthalpy of melting can be used to store heat in a simple way for time periods of hours and days. Knowledge of the solid–liquid equilibria represents the most important pre- sumption for systematic evaluations of the suitability of hydrated salt mixtures. In this paper, two approaches for predicting solid–liquid equilibria in ternary or higher component systems are discussed using the limited amount of thermodynamic data available for such systems. One method is based on the modified Brunauer–Emmett–Teller (BET) model as formulated by Ally and Braunstein. In cases of a strong tendency toward complex formation of salt components, the BET model is no longer applicable. Reaction chain models have been used to treat such systems. Thereby, the reaction chain represents a method to correlate step-wise hydration or com- plexation enthalpies and entropies and, thus, reduce the number of adjustable parameters. Results are discussed for systems containing MgCl2, CaCl2, ZnCl2, and alkali metal chlo- rides.

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Get full text

Authors

  • W. Voigt

  • D. Zeng

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free