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Article Dans Une Revue AIChE Journal Année : 2008

Thermodynamic properties of THF + CO2 hydrates in relation with refrigeration applications

Didier Dalmazzone
Walter Fürst
Anthony Delahaye

Résumé

Clathrate hydrate slurries are promising systems in the field of cold distribution. In this work, the Lw-H-V equilibrium conditions, the dissociation enthalpy, and the CO2 hydration number of a clathrate hydrate formed from THF/CO2/water mixtures were studied, using a DSC method. For equilibrium condition determination, THF concentration was varied from 1.0 to 16.0 wt % and CO2 partial pressure range was 0.2 to 2.0 MPa. For enthalpy measurements, THF concentration was fixed at 19 wt % and CO2 partial pressure investigated from 0.2 to 2.0 MPa. Experimental equilibrium temperatures and enthalpy values were in good agreement with the results of a model combining the van der Waals and Platteeuw approach with the RKS equation of state associated to a MHV2 mixing rule and UNIFAC model. Equilibrium conditions and dissociation enthalpy show that THF + CO2 hydrate slurries are promising mixtures for refrigeration application. © 2008 American Institute of Chemical Engineers.

Dates et versions

hal-00848775 , version 1 (30-07-2013)

Identifiants

Citer

María del Carmen Martínez, Didier Dalmazzone, Walter Fürst, Anthony Delahaye, Laurence Fournaison. Thermodynamic properties of THF + CO2 hydrates in relation with refrigeration applications. AIChE Journal, 2008, 54 (4), pp.1088-1095. ⟨10.1002/aic.11455⟩. ⟨hal-00848775⟩
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