Estimation of ultra-stability of methane hydrate at 1 atm by thermal conductivity measurement

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	Estimation of ultra-stability of methane hydrate at 1 atm by thermal conductivity measurement
	2010-01-01
发表期刊	JOURNAL OF NATURAL GAS CHEMISTRY
ISSN	1003-9953
卷号	19 期号:3 页码:229
摘要	Thermal conductivity of methane hydrate was measured in hydrate dissociation self-preservation zone by means of the transient plane source (TPS) technique developed by Gustafsson. The sample was formed from 99.9% (volume ratio) methane gas with 280 ppm sodium dodecyl sulfate (SDS) solution under 6.6 MPa and 273.15 K. The methane hydrate sample was taken out of the cell and moved into a low temperature chamber when the conversion ratio of water was more than 90%. In order to measure the thermal conductivity, the sample was compacted into two columnar parts by compact tool at 268.15 K. The measurements are carried out in the temperature ranging from 263.15 K to 271.15 K at atmospheric pressure. Additionally, the relationship between thermal conductivity and time is also investigated at 263.15 K and 268.15 K, respectively. In 24 h, thermal conductivity increases only 5.45% at 268.15 K, but thermal conductivity increases 196.29% at 263.15 K. Methane hydrates exhibit only minimal decomposition at 1 atm and the temperature ranging from 263.15 K to 271.15K. At 1 atm and 268.15 K, the total gas that evolved after 24 h was amounted to less than 0.71% of the originally stored gas, and this ultra-stability was maintained if the test was lasted for more than two hundreds hours before terminating.
关键词	GAS PRESERVATION DISSOCIATION ICE methane hydrate self-preservation dissociation velocity thermal conductivity
语种	英语
资助项目	[National Basic Research Program of China] ; [National Natural Science Foundation of China] ; [Guangdong Province Science and Technology]
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/28739
作者单位	1.中国科学院广州能源研究所 2.辽宁省地震局 3.中国科学院大学
推荐引用方式 GB/T 7714	. Estimation of ultra-stability of methane hydrate at 1 atm by thermal conductivity measurement[J]. JOURNAL OF NATURAL GAS CHEMISTRY,2010,19(3):229.
APA	(2010).Estimation of ultra-stability of methane hydrate at 1 atm by thermal conductivity measurement.JOURNAL OF NATURAL GAS CHEMISTRY,19(3),229.
MLA	"Estimation of ultra-stability of methane hydrate at 1 atm by thermal conductivity measurement".JOURNAL OF NATURAL GAS CHEMISTRY 19.3(2010):229.