, Volume 52, Issue 2, pp 194–205 | Cite as

About transformation of the deep-water methane bubbles into hydrate powder and hydrate foam

  • A. V. EgorovEmail author
  • R. I. Nigmatulin
  • A. N. Rozhkov
  • A. M. Sagalevich
  • E. S. Chernyaev
Marine Chemistry


During the Russian Academy of Sciences “MIRI na Baikale, 2008–2010” expedition, deep-water experiments with the bubbles of methane seeping from the bottom at depths 405, 860 and 1400 meters were carried out. These depths correspond to gas hydrate stability zone. Bubbles were caught by the trap which was looked like an inverted glass. It was found that the behavior of bubbles in a trap depends on the depth. At depth of 405 meters formation of hydrates was not observed. Having got to a trap at the depth of 860 meters, bubbles became covered by solid hydrate envelope, kept the initial form, and after a time period collapsed in a number of hydrate fragments which showed all properties of a granular matter. No visible changes in the hydrate granular matter were observed in the course of lifting it to a depth of 380 meters. Shallower, the decomposition of the hydrate granular matter into methane gas was observed. In the experiments at depth of 1400 meters the caught bubbles, becoming covered by hydrate envelope formed solid hydrate foam in the trap. At lifting this foam structure was deformed slightly but simultaneously a free gas left the foam and filled the trap. The volume of free gas in the trap at lifting varied according to the Boyle-Mariotte law.


Foam Hydrate Shell Hydrate Formation Methane Hydrate Methane Bubble 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Pleiades Publishing, Ltd. 2012

Authors and Affiliations

  • A. V. Egorov
    • 1
    Email author
  • R. I. Nigmatulin
    • 1
  • A. N. Rozhkov
    • 1
    • 2
  • A. M. Sagalevich
    • 1
  • E. S. Chernyaev
    • 1
  1. 1.Shirshov Institute of OceanologyRussian Academy of SciencesMoscowRussia
  2. 2.Ishlinskii Institute of Mechanical ProblemsRussian Academy of SciencesMoscowRussia

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