Experimental Investigation of the Supercooling Effect on Methane Hydrate Formation

Abstract

Abstract:

The methane hydrate in the porous media is formed in the experimental vessel under the different supercooling degrees. The results show that the methane hydrate formation process consists of the four stages: gas/water dissolution, nucleation, growth and stable state. Under the same initial operation conditions, when the hydrate formation reaches a stable stage, the temperaturepressure points of the system with the different supercooling degrees are on the curve parallel with the hydrate equilibrium formation curve in the pure hydrate system. However, the conversion rate of gas into hydrate and the saturation of hydrate in the vessel decrease with the supercooling degree. The minimum supercooling degree which is necessary for the methane hydrate formation in porous is only 2.5 ℃, which was much lower than that in bulk water.

Key words: methane hydrate, sediment, supercooling

CLC Number:

TE122.1

LI Gang, LI Xiao-Sen. Experimental Investigation of the Supercooling Effect on Methane Hydrate Formation[J]. Geoscience, 2010, 24(3): 627-631.

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