2013 1(12)

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Nakoryakov V.E., Misyura S.Y.

Institute of Thermophysics SB RAS, Novosibirsk, Russia


Nakoryakov V.E. The effect of nonisothermal conditions on dissociation of methane hydrate at negative temperatures / V.E. Nakoryakov, S.Y. Misyura // Modern Science: Researches, Ideas, Results, Technologies. - Dnepropetrovsk: SPIC "Triacon". - 2013. - Iss. #1(12). - PP. 68 - 72


hydrates; heat- and mass-transfer; dissociation


An experimental study of the dissociation of methane hydrate in the presence of air at a pressure of 1 bar. At destruction of clathrate is necessary to consider not only the degree of deviation of the temperature and pressure in equilibrium values , but the rate of transfer of heat and mass, and the characteristic speed of the physical processes such as crystallization, diffusion, material ductility. Different speeds of heat and mass transfer were implemented by changing the heat fl ow. The maximum speed of the hydrate decomposition was observed during combustion of methane on the surface of the phase (hydrate - gas), which is an order of magnitude higher than the speed of dissociation without burning. Measurement of the concentration of methane was carried weight, volume and X-ray diffraction method. Measurement of the instantaneous velocity of dissociation possible to identify a few specific time intervals with significantly different reaction rates, and highlight the short-term treatment of abnormally low dissociation rate - the phenomenon of “self-preservation”.


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