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Document IIF

Modèle de la formation d'hydrate de CO2 et données expérimentales associées.

CO2 hydrate growth model and related experimental data.

Numéro : pap. 073

Auteurs : VASILESCU C., INFANTE FERREIRA C.

Résumé

CO2 hydrate slurry have been proposed to be suitable for refrigeration application. In this study, the hydrate forming conditions are experimentally investigated. CO2 hydrates are formed from CO2 and water mixture at elevated pressures by cooling down the solution until a supersaturated condition is obtained. A theoretical crystal growth model is presented that will be used to predict the amount of hydrates produced in the experimental set-up. The previously developed flash model is used to predict the CO2 concentration in the bulk liquid under super-saturation conditions. Equilibrium conditions, which are expressed through the equality of fugacities of each component in all phases, are assumed at the hydrate-liquid interface. The resulting concen-tration difference between bulk and interface is the driving force considered for the mass transfer from solu-tion into the hydrate crystals. This will be combined with a simultaneous heat and mass transfer model and used in a control volume approach. This allows for the prediction of amount of crystal material formed as the solution flows through a coil heat exchanger.

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Pages : 7 p.

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Détails

  • Titre original : CO2 hydrate growth model and related experimental data.
  • Identifiant de la fiche : 30005079
  • Langues : Anglais
  • Source : 10th International Conference on Phase-Change Materials and Slurries for Refrigeration and Air Conditioning. Proceedings: Kobe, Japan, July 29-August 1, 2012.
  • Date d'édition : 01/07/2012

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