Preservation phenomena of methane hydrate in pore spaces

Akihiro Hachikubo, Satoshi Takeya, Evgeny Chuvilin, Vladimir Istomin

Research output: Contribution to journalArticlepeer-review

34 Citations (Scopus)

Abstract

Dissociation processes of methane hydrate synthesized with glass beads were investigated using powder X-ray diffraction and calorimetry. Methane hydrate formed with coarse glass beads dissociated quickly at 150-200 K; in this temperature range methane hydrate dissociates at atmospheric pressure. In contrast, methane hydrate formed with glass beads less than a few microns in size showed very high stability up to just below the melting point of ice, even though this temperature is well outside the zone of thermodynamic stability of the hydrate. The rate-determining steps for methane hydrate dissociation within pores are also discussed. The experimental results suggest that methane hydrate existing naturally within the pores of fine particles such as mud at low temperatures would be significantly more stable than expected thermodynamically. This journal is

Original languageEnglish
Pages (from-to)17449-17452
Number of pages4
JournalPhysical Chemistry Chemical Physics
Volume13
Issue number39
DOIs
Publication statusPublished - 21 Oct 2011
Externally publishedYes

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