Recovery of Methane from Gas Hydrates Intercalated within Natural Sediments Using CO2 and a CO2/N2 Gas Mixture

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The direct recovery of methane from massive methane hydrates (MHs), artificial MH-bearing clays, and natural MH-bearing sediments is demonstrated, using either CO2 or a CO2/N2 gas mixture (20 mol?% of CO2 and 80 mol?% of N2, reproducing flue gas from a power plant) for methane replacement in complex marine systems. Natural gas hydrates (NGHs) can be converted into CO2 hydrate by a swapping mechanism. The overall process serves a dual purpose: it is a means of sustainable energy-source exploitation and greenhouse-gas sequestration. In particular, scant attention has been paid to the natural sediment clay portion in deep-sea gas hydrates, which is capable of storing a tremendous amount of NGH. The clay interlayer provides a unique chemicalphysical environment for gas hydrates. Herein, for the first time, we pull out methane from intercalated methane hydrates in a clay interlayer using CO2 and a CO2/N2 gas mixture. The results of this study are expected to provide an essential physicochemical background required for large-scale NGH production under the seabed.
Publisher
WILEY-V C H VERLAG GMBH
Issue Date
2012-08
Language
English
Article Type
Article
Keywords

POROUS SILICA-GELS; CARBON-DIOXIDE; PHASE; MONTMORILLONITE; STABILITY; CLAY; EQUILIBRIA; MEXICO; GULF

Citation

CHEMSUSCHEM, v.5, no.8, pp.1443 - 1448

ISSN
1864-5631
DOI
10.1002/cssc.201100644
URI
http://hdl.handle.net/10203/102540
Appears in Collection
CBE-Journal Papers(저널논문)
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