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PHASE EQUILIBRIA AND FORMATION KINETIS OF CARBON DIOXIDE, METHANE, AND NATURAL GAS IN SILICA GEL PORES

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Title: PHASE EQUILIBRIA AND FORMATION KINETIS OF CARBON DIOXIDE, METHANE, AND NATURAL GAS IN SILICA GEL PORES
Author: Kang, Seong-Pil; Seo, Yutaek
Subject Keywords gas hydrates;carbon dioxide;methane;natural gas;equilibrium;formation;kinetics;ICGH 2008;International Conference on Gas Hydrates 2008
Issue Date: 2008-07
Publicly Available in cIRcle 2008-07-29
Citation: Kang, Seong-Pil; Seo, Yutaek. 2008. PHASE EQUILIBRIA AND FORMATION KINETIS OF CARBON DIOXIDE, METHANE, AND NATURAL GAS IN SILICA GEL PORES. Proceedings of the 6th International Conference on Gas Hydrates (ICGH 2008), Vancouver, British Columbia, CANADA, July 6-10, 2008.
Abstract: Hydrate phase equilibria for the CO2, CH4 and natural gas in silica gel pores of nominal pore diameters 6, 30 and 100 nm were measured, and compared with the calculated results based on van der Waals and Platteeuw model. At a specific temperature, three-phase hydrate–water-rich liquid–vapor (HLV) equilibrium curves for pore hydrates were shifted to the higher pressure condition depending on pore sizes when compared with those of bulk hydrates. The activities of water in porous silica gels were modified to account for capillary effect, and the calculated results were in good agreement with the experimental data. To investigate the formation kinetics of each system, the isobaric method was applied. It was found that there were no difference in structure between hydrate in silica gel pore and that in bulk free state. Results showed that hydrate formation in the silica gel pores indicated significantly faster rates, intensively reduced induction times, increased gas consumption and conversion of water to hydrate as compared to hydrate formation in bulk free water or fine ice powder. Utilizing these superior characteristics, formation of hydrate in porous material is expected to present the process on gas separation or storage.
Affiliation: OtherOther
URI: http://hdl.handle.net/2429/1176
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