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Issue 39, 2011
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Preservation phenomena of methane hydrate in pore spaces

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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.

Graphical abstract: Preservation phenomena of methane hydrate in pore spaces

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Publication details

The article was received on 20 Jul 2011, accepted on 31 Aug 2011 and first published on 14 Sep 2011


Article type: Communication
DOI: 10.1039/C1CP22353D
Citation: Phys. Chem. Chem. Phys., 2011,13, 17449-17452
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    Preservation phenomena of methane hydrate in pore spaces

    A. Hachikubo, S. Takeya, E. Chuvilin and V. Istomin, Phys. Chem. Chem. Phys., 2011, 13, 17449
    DOI: 10.1039/C1CP22353D

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