Dissociation Behavior of Methane Hydrate in Porous Media

Chem. J. Chinese Universities ›› 2010, Vol. 31 ›› Issue (9): 1848.

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Dissociation Behavior of Methane Hydrate in Porous Media

ZHANG Yu, WU Hui-Jie, LI Xiao-Sen^*, CHEN Zhao-Yang, LI Gang, ZENG Zhi-Yong

Guangzhou Center for Gas Hydrate Research, Key Laboratory of Renewable Energy and Gas Hydrate, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China

Received:2010-01-14 Online:2010-09-10 Published:2010-09-10
Contact: LI Xiao-Sen. E-mail: lixs@ms.giec.ac.cn
Supported by:
国家自然科学基金(批准号: 20773133, 50874098)、中科院知识创新工程重要方向项目(批准号: KGCX2-YW-3X6)、中科院重大科研装备项目(批准号: YZ200717)、广东省科技计划项目(批准号: 2009B050600006)、国家“八六三”计划项目(批准号: 2006AA09A209)和国家“九七三”计划项目(2009CB219507)资助.

Abstract

Abstract: The dissociation behavior of methane hydrate in the porous media were studied when the temperature was above the quadruple phase[Hydrate(H)-Water(L_W)-Ice(Ⅰ)-Vapor(Ⅴ)] point temperature. The silica gels were applied as the porous media for the experiments, in which the diameter ranges of the silica gel particles were 0.105—0.150, 0.150—0.200 and 0.300—0.450 mm, and the mean pore diameters, 9.03, 12.95, 17.96 and 33.20 nm, respectively. The dissociation experiments were carried out by depressurization in the temperature range of 269.15—278.15 K and the initial formation pressure range of 4.1—11.0 MPa. The experiments indicated that the dissociation rate of methane increases with the increase of the initial formation pressure, the decrease of the bath temperature, the decrease of the particle range and the increase of the mean pore diameter. For relative big the particle diameter, the water in some pores becomes ice in the disso-ciation process, which makes the dissociation process relatively slow.

Key words: Methane hydrate, Dissociation, Porous media

TrendMD:

ZHANG Yu, WU Hui-Jie, LI Xiao-Sen*, CHEN Zhao-Yang, LI Gang, ZENG Zhi-Yong. Dissociation Behavior of Methane Hydrate in Porous Media[J]. Chem. J. Chinese Universities, 2010, 31(9): 1848.

References

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Dissociation Behavior of Methane Hydrate in Porous Media

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