Phase transformation of methane hydrate under high pressure

In situ Raman spectroscopy is employed to study the phase behavior of methane hydrate at high pressure. The structure 1 of methane hydrate can be maintained up to 950 MPa at 299 K. The transformation of structure Istructure H+water+CH4 occurs at 880 MPa and 323 K. The structure H of methane hydrate,...

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Veröffentlicht in:The Journal of chemical physics 2005-01, Vol.122 (2), p.024714-024714
Hauptverfasser: Sun, Qiang, Duan, Ti-Yu, Zheng, Hai-Fei, Ji, Jian-Qing, Wu, Xiang-Yang
Format: Artikel
Sprache:eng
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Zusammenfassung:In situ Raman spectroscopy is employed to study the phase behavior of methane hydrate at high pressure. The structure 1 of methane hydrate can be maintained up to 950 MPa at 299 K. The transformation of structure Istructure H+water+CH4 occurs at 880 MPa and 323 K. The structure H of methane hydrate, however, decomposes to methane and water at 960 MPa and 348 K. The initiation mechanism of methane hydrate sI is also discussed.
ISSN:0021-9606
1089-7690
DOI:10.1063/1.1830411