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Développement d'une équation d'état pour la représentation de l'équilibre solide-liquide, solide-vapeur, et liquide-vapeur de substances intéressantes pour le procédé de distillation de l'air.

Development of an equation of state for the representation of solid-liquid, solid-vapour, and liquid-vapour equilibria of substances of interest for the air distillation process.

Numéro : pap. n. 028

Auteurs : STRINGARI P., CAMPESTRINI M., COQUELET C., et al.

Résumé

A common problem in the industrial cryogenic processes, as cryogenic air distillation, is the solidification of some impurities. Consequently, a thermodynamic model suitable for being applied in the simulation of cryogenic processes should account for the solid-fluid equilibrium. The capability of the Yokozeki equation of state in representing phase equilibrium experimental values of pure compounds has been verified. Some limits have been found with respect to the solid-liquid equilibrium. In order to overcome these limits the Solid Liquid Vapour Peng-Robinson equation of state (SLV PR EoS) has been proposed. A comparison between the SLV PR EoS and the experimental values has been presented for nitrogen, oxygen, argon, krypton, xenon, neon, carbon dioxide, nitrous oxide, methane, ethane, ethylene, propane and propylene, and a good agreement has been found. Furthermore, the equation proposed has been used for representing the phase equilibria of the binary mixtures methane-carbon dioxide and ethane-carbon dioxide.

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Pages : 442-447

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Détails

  • Titre original : Development of an equation of state for the representation of solid-liquid, solid-vapour, and liquid-vapour equilibria of substances of interest for the air distillation process.
  • Identifiant de la fiche : 30007016
  • Langues : Anglais
  • Source : Cryogenics 2012. Proceedings of the 12th IIR International Conference: Dresden, Germany, September 11-14, 2012.
  • Date d'édition : 11/09/2012

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