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Article Dans Une Revue Chemical Engineering Science Année : 2012

Phase equilibria of CO 2+N 2 and CO 2+CH 4 clathrate hydrates: Experimental measurements and thermodynamic modelling

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Veronica Belandria
Amir H. Mohammadi
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Dominique Richon
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Résumé

Experimental dissociation conditions for clathrate hydrates of carbon dioxide+nitrogen are reported in the (278.1 to 285.3) K and (3.24 to 29.92) MPa ranges, which were measured using an isochoric pressure search method. The relative molar composition of carbon dioxide and nitrogen in the feed gas, varying between (0.271 and 0.812), were measured by gas chromatography technique. A thermodynamic model based on the Cubic Plus Association equation of state for fluid phases combined with the van der Waals and Platteeuw solid solution theory for the hydrate phase is presented herein. The dissociation data generated in this work along with the experimental data reported in the literature for carbon dioxide+nitrogen and carbon dioxide+methane hydrates are compared with the results of this model and also with the predictions of two other thermodynamic models, namely HWHYD and CSMGem. A discussion is made about the deviations observed between experimental and predictions.
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Dates et versions

hal-00797080 , version 1 (05-03-2013)

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Imen Ben Attouche Sfaxi, Veronica Belandria, Amir H. Mohammadi, Rafael Lugo, Dominique Richon. Phase equilibria of CO 2+N 2 and CO 2+CH 4 clathrate hydrates: Experimental measurements and thermodynamic modelling. Chemical Engineering Science, 2012, 84, pp.602-611. ⟨10.1016/j.ces.2012.08.041⟩. ⟨hal-00797080⟩
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