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Contactless probing of polycrystalline methane hydrate at pore scale suggests weaker tensile properties than thought

Author

Listed:
  • Dyhia Atig

    (Laboratoire des fluides complexes et de leurs réservoirs)

  • Daniel Broseta

    (Laboratoire des fluides complexes et de leurs réservoirs)

  • Jean-Michel Pereira

    (Ecole des Ponts, Univ Gustave Eiffel)

  • Ross Brown

    (Institut des sciences analytiques et de physico-chimie pour l’environnement et les matériaux)

Abstract

Methane hydrate is widely distributed in the pores of marine sediments or permafrost soils, contributing to their mechanical properties. Yet the tensile properties of the hydrate at pore scales remain almost completely unknown, notably the influence of grain size on its own cohesion. Here we grow thin films of the hydrate in glass capillaries. Using a novel, contactless thermal method to apply stress, and video microscopy to observe the strain, we estimate the tensile elastic modulus and strength. Ductile and brittle characteristics are both found, dependent on sample thickness and texture, which are controlled by supercooling with respect to the dissociation temperature and by ageing. Relating the data to the literature suggests the cohesive strength of methane hydrate was so far significantly overestimated.

Suggested Citation

  • Dyhia Atig & Daniel Broseta & Jean-Michel Pereira & Ross Brown, 2020. "Contactless probing of polycrystalline methane hydrate at pore scale suggests weaker tensile properties than thought," Nature Communications, Nature, vol. 11(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-16628-4
    DOI: 10.1038/s41467-020-16628-4
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    Cited by:

    1. Xu, Jiuping & Tang, Min & Liu, Tingting & Fan, Lurong, 2024. "Technological paradigm-based development strategy towards natural gas hydrate technology," Energy, Elsevier, vol. 289(C).
    2. Thi Xiu Le & Michel Bornert & Ross Brown & Patrick Aimedieu & Daniel Broseta & Baptiste Chabot & Andrew King & Anh Minh Tang, 2021. "Combining Optical Microscopy and X-ray Computed Tomography Reveals Novel Morphologies and Growth Processes of Methane Hydrate in Sand Pores," Energies, MDPI, vol. 14(18), pages 1-21, September.

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