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Cycle à adsorption oscillatoire sous vide pour la récupération du R-32 à partir d'un mélange de frigorigènes R-410A.

Vacuum swing adsorption for R-32 recovery from R-410A refrigerant blend.

Auteurs : RIBEIRO R. P. P. L., SOSA J. E., ARAUJO J. M. M., PEREIRO A. B.

Type d'article : Article de la RIF

Résumé

The recovery of high purity fluorinated gases from refrigerant blends is vital to promote a circular economy in the field of refrigeration and air conditioning. In this work, we evaluate the performance of a four-step Vacuum Swing Adsorption (VSA) process using activated carbon for the recovery of R-32 (difluoromethane) from a R-410A refrigerant blend: a binary mixture of R-125 (pentafluoroethane) and R-32 (0.7; 0.3). Breakthrough curves were performed using dilute and bulk feed concentrations to determine mass and heat transfer parameters, which were then employed in simulations of fixed-bed adsorber dynamics. The mathematical model employed successfully predicts the experimental results of a four-step VSA cycle (feed, blowdown, purge, pressurization). The VSA performance was evaluated using process simulation. For a cycle time of 800 s (each step taking 200 s) and feed and regeneration pressures of 1.01 and 0.01 bar, respectively, R-32 is obtained with 97.0 mol-% purity and 30.9% recovery, with process productivity of 4.06 mol h−1 per kilogram of adsorbent, and energy consumption of 123.2 kJ/mol. Our results demonstrate the feasibility of using VSA processes for the recovery of R-32 from the near-azeotropic R-410A refrigerant blend.

Documents disponibles

Format PDF

Pages : 253-264

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 : Vacuum swing adsorption for R-32 recovery from R-410A refrigerant blend.
  • Identifiant de la fiche : 30031725
  • Langues : Anglais
  • Sujet : Technologie, Environnement
  • Source : International Journal of Refrigeration - Revue Internationale du Froid - vol. 150
  • Date d'édition : 06/2023
  • DOI : http://dx.doi.org/10.1016/j.ijrefrig.2023.01.020

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