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

Kyoichi Tezuka, Tatsuhiko Taguchi, Saman Alavi, Amadeu K. Sum and Ryo Ohmura
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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

Energies, 2012, vol. 5, issue 2, 1-7

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.

Keywords: clathrate hydrate; structure H; phase equilibria; molecular properties (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2012
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