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Thermodynamic Stability of Structure H Hydrates Based on the Molecular Properties of Large Guest Molecules

Author

Listed:
  • Kyoichi Tezuka

    (Department of Mechanical Engineering, Keio University, Yokohama 223-8522, Japan)

  • Tatsuhiko Taguchi

    (Department of Mechanical Engineering, Keio University, Yokohama 223-8522, Japan)

  • Saman Alavi

    (Steacie Institute for Molecular Sciences, National Research Council of Canada, 100 Sussex Drive, Ottawa, Ontario K1A 0R6, Canada)

  • Amadeu K. Sum

    (Center for Hydrate Research, Chemical Engineering Department, Colorado School of Mines, Golden, CO 80401, USA)

  • Ryo Ohmura

    (Department of Mechanical Engineering, Keio University, Yokohama 223-8522, Japan)

Abstract

This paper report analyses of thermodynamic stability of structure-H clathrate hydrates formed with methane and large guest molecules in terms of their gas phase molecular sizes and molar masses for the selection of a large guest molecule providing better hydrate stability. We investigated the correlation among the gas phase molecular sizes, the molar masses of large molecule guest substances, and the equilibrium pressures. The results suggest that there exists a molecular-size value for the best stability. Also, at a given molecule size, better stability may be available when the large molecule guest substance has a larger molar mass.

Suggested Citation

  • Kyoichi Tezuka & Tatsuhiko Taguchi & Saman Alavi & Amadeu K. Sum & Ryo Ohmura, 2012. "Thermodynamic Stability of Structure H Hydrates Based on the Molecular Properties of Large Guest Molecules," Energies, MDPI, vol. 5(2), pages 1-7, February.
    • Handle: RePEc:gam:jeners:v:5:y:2012:i:2:p:459-465:d:16267
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