Isothermal Phase Equilibria for Binary Hydrate Systems of Carbon Dioxide + Ethane and Carbon Dioxide + Tetrafluoromethane

Isothermal Phase Equilibria for Binary Hydrate Systems of Carbon Dioxide + Ethane and Carbon Dioxide + Tetrafluoromethane

The present paper reports isothermal three-phase equilibria (hydrate + aqueous + gas phases) for the carbon dioxide (CO2) + ethane (C2H6) mixed-gas hydrate system at (274.15, 279.15, and 284.15) K and the carbon dioxide (CO2) + tetrafluoromethane (CF4) mixed-gas hydrate system at (274.15 and 279.15)...

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Veröffentlicht in:Journal of chemical and engineering data 2010-09, Vol.55 (9), p.3297-3301
Hauptverfasser: Matsui, Yuuki, Ogura, Yoshihiro, Miyauchi, Hiroshi, Makino, Takashi, Sugahara, Takeshi, Ohgaki, Kazunari
Format: Artikel
Sprache:eng
Schlagworte:
Chemistry
Exact sciences and technology
General and physical chemistry
Phase equilibria
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Zusammenfassung:The present paper reports isothermal three-phase equilibria (hydrate + aqueous + gas phases) for the carbon dioxide (CO2) + ethane (C2H6) mixed-gas hydrate system at (274.15, 279.15, and 284.15) K and the carbon dioxide (CO2) + tetrafluoromethane (CF4) mixed-gas hydrate system at (274.15 and 279.15) K. None of the equilibrium pressure−composition curves of hydrate, aqueous, and gas phases shows discontinuity in the gradient. Both CO2 + C2H6 and CO2 + CF4 mixed-gas hydrates are the structure-I hydrate under the present experimental conditions, which is supported by the results of in situ Raman spectroscopy.
ISSN:0021-9568
1520-5134
DOI:10.1021/je100097x