Ocean and Polar Research

Korea Institute of Ocean Science & Technology (한국해양과학기술원)
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Formation and Dissociation Processes of Gas Hydrate Composed of Methane and Carbon Dioxide below Freezing

  • Hachikubo, Akihiro (New Energy Resources Research Center, Kitami Institute of Technology) ;
  • Yamada, Koutarou (Department of Civil Engineering, Kitami Institute of Technology) ;
  • Miura, Taku (Department of Civil Engineering, Kitami Institute of Technology) ;
  • Hyakutake, Kinji (Department of Civil Engineering, Kitami Institute of Technology) ;
  • Abe, Kiyoshi (New Energy Resources Research Center, Kitami Institute of Technology) ;
  • Shoji, Hitoshi (New Energy Resources Research Center, Kitami Institute of Technology)
  • Published : 2004.09.30
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Abstract

The processes of formation and dissociation of gas hydrates were investigated by monitoring pressure and temperature variations in a pressure cell in order to understand the kinetic behavior of gas hydrate and the controlling factors fur the phase transition of gas hydrate below freezing. Gas hydrates were made kom guest gases ($CH_4,\;CO_2$, and their mixed-gas) and fine ice powder. We found that formation and dissociation speeds of gas hydrates were not controlled by temperature and pressure conditions alone. The results of this study suggested that pressure levels at the formation of mixed-gas hydrate determine the transient equilibrium pressure itself.

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References

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