Partager

Document IIF

Étude paramétrique de la cinétique de cristallisation des hydrates de CO2 : influence de la vitesse d’agitation et du type de roue. 

CO2 hydrates crystallization kinetic parametric study: effect of stirring rate and impeller type.

Numéro : 0024

Auteurs : OSSWALD V., CLAIN P., DELAHAYE A., FOURNAISON L.

Résumé

Carbon dioxide hydrates are ice-like crystalline solids composed of CO2 molecules trapped inside cages of hydrogen-bonded water molecules. CO2 hydrate slurries can be used as phase change material for industrial issues of cold distribution due to the high dissociation enthalpy of CO2 hydrate (around 374 kJ kg-1, higher than that of ice – 333 kJ kg-1). However, the formation rate of CO2 hydrate is a real limitation, and the way to control and promote it is a key parameter.
The present work investigates the kinetics of CO2 hydrate crystallization for two different types of stirrers: on the one hand a three-pitched blade stirrer and, on the other hand, a hollow shaft eight-blade Rushton turbine. A jacketed stirred batch reactor, with a specially developed sensor (a thermopile), is used to determine experimental heat balance on the cooling jacket. The mass fraction of crystallized hydrate during the time is determined directly from this heat balance. We conclude with the global performance of both heat and mass transfers of the stirrer and give general recommendations for the choice of stirrer type and scale-up process.

Documents disponibles

Format PDF

Pages : 10 p.

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 : CO2 hydrates crystallization kinetic parametric study: effect of stirring rate and impeller type.
  • Identifiant de la fiche : 30032377
  • Langues : Anglais
  • Sujet : Technologie
  • Source : 14th IIR Conference on Phase-Change Materials and Slurries for Refrigeration and Air Conditioning. Proceedings:  Paris France, May 29-31, 2024.
  • Date d'édition : 31/05/2024
  • DOI : http://dx.doi.org/10.18462/iir.pcm.2024.0024

Liens


Voir d'autres communications du même compte rendu (40)
Voir le compte rendu de la conférence

Indexation