气候变化领域集成服务门户(CCPortal): Experimental study of the thermal conductivity of frozen hydrate-saturated sediments at atmospheric pressure

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	Experimental study of the thermal conductivity of frozen hydrate-saturated sediments at atmospheric pressure
	Chuvilin E.M.; Bukhanov B.A.
发表日期	2013
ISSN	15607496
卷号	17 期号:1
英文摘要	This paper presents the results of experimental investigations of the thermal conductivity of artificial hydrate bearing sediment samples in the frozen state under nonequilibrium conditions. Pore hydrates in these samples have been maintained for a long time due to the manifestation of the self-preservation effect of gas hydrates at temperatures below zero. It is possible to estimate the hydrate saturation of frozen samples, to describe their structure and to carry out the identification of a number of physical characteristics (water content, density, porosity and thermal conductivity). At the same time the authors have carried out the comparative analysis of the data for the frozen hydrate-saturated samples and frozen control samples that did not contain porous methane hydrate. The experiments have demonstrated that the thermal conductivity of frozen gas hydrate samples are lower than the frozen control samples. The magnitude of the differences depends on the composition and structure of sediments and this structural feature can be tens of percent or more. With increasing hydrate saturation of samples and decreasing dispersion, these differences in values of the thermal conductivity increase. Due to self-preservation of porous gas hydrates, the thermal conductivity of frozen hydrate-saturated samples enhances in time. The obtained results demonstrate the possibility of the future use of the thermal conductivity parameter for selecting hydrate horizons in permafrost, including those in metastable state.
英文关键词	Dispersed species; Ice; Porous gas hydrates; Self-preservation effect; Thermal conductivity
学科领域	atmospheric pressure; experimental study; gas hydrate; glacial deposit; ice; methane; permafrost; porous medium; thermal conductivity
语种	英语
scopus关键词	atmospheric pressure; experimental study; gas hydrate; glacial deposit; ice; methane; permafrost; porous medium; thermal conductivity
来源期刊	Earth's Cryosphere
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/120339
作者单位	Lomonosov Moscow State University, Department of Geology, Leninskie Gory, 1, Moscow, 119991, Russian Federation
推荐引用方式 GB/T 7714	Chuvilin E.M.,Bukhanov B.A.. Experimental study of the thermal conductivity of frozen hydrate-saturated sediments at atmospheric pressure[J],2013,17(1).
APA	Chuvilin E.M.,&Bukhanov B.A..(2013).Experimental study of the thermal conductivity of frozen hydrate-saturated sediments at atmospheric pressure.Earth's Cryosphere,17(1).
MLA	Chuvilin E.M.,et al."Experimental study of the thermal conductivity of frozen hydrate-saturated sediments at atmospheric pressure".Earth's Cryosphere 17.1(2013).