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Equilibres vapeur-liquide et coefficients d’inter-diffusion pour les couples de fluides actifs pour les systèmes frigorifiques à absorption composés de [HMIM][BF 4 ] et de propanes fluorés.

Vapor–liquid equilibria and inter-diffusion coefficients for working pairs for absorption refrigeration systems composed of [HMIM][BF 4 ] and fluorinated propanes.

Auteurs : LIU X., NGUYEN M. Q., XUE S., et al.

Type d'article : Article, Article de la RIF

Résumé

Hydrofluorocarbon + Ionic liquid is a promising working pair for the absorption refrigeration system. The vapor–liquid equilibrium and inter-diffusion coefficient of hydrofluorocarbon + ionic liquid are two key parameters used to evaluate the performance of the working pair. In this work, the vapor–liquid equi- librium and inter-diffusion coefficients of 1-hexyl-3-methylimidazolium tetrafluoroborate and fluorinated propanes including R227ea, R236fa and R245fa were measured from 303 K to 343 K and up to 332 kPa. The mole fractions of the three fluorinated propanes in liquid phase at vapor–liquid equilibrium were found to increase in the order: R227ea < R236fa < R245fa; they also increased with decreasing temperature and increasing pressure, while the inter-diffusion coefficients were found to increase with increasing temperature. The non-random two-liquid (NRTL) model was used to correlate vapor–liquid equilibrium data, while the Arrhenius, Litovitz, and Vogel -Fulcher -Tammann equations were used to correlate the inter-diffusion coefficient data.

Documents disponibles

Format PDF

Pages : 34-41

Disponible

  • Prix public

    20 €

  • Prix membre*

    Gratuit

* meilleur tarif applicable selon le type d'adhésion (voir le détail des avantages des adhésions individuelles et collectives)

Détails

  • Titre original : Vapor–liquid equilibria and inter-diffusion coefficients for working pairs for absorption refrigeration systems composed of [HMIM][BF 4 ] and fluorinated propanes.
  • Identifiant de la fiche : 30026561
  • Langues : Anglais
  • Sujet : Alternatives aux HFC
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 104
  • Date d'édition : 08/2019
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2019.04.023

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