Uniqueness of the equilibrium relationship among temperature, pressure and liquid water content in hydrate-bearing soils

doi:10.1016/j.jngse.2021.103820

	Uniqueness of the equilibrium relationship among temperature, pressure and liquid water content in hydrate-bearing soils
	Liang, Wenpeng 1,2; Zhou, Jiazuo 1,2; Wei, Changfu 1,2
刊名	JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING
	2021-04-01
卷号	88 页码:9
关键词	Hydrate-bearing soil Phase equilibrium condition Dissociation curve Phase boundary Unhydrated water content
ISSN号	1875-5100
DOI	10.1016/j.jngse.2021.103820
英文摘要	The dissociation curves of pore hydrate, conventionally depicted on the P-T plane, depend generally upon the adopted experimental conditions. In this paper, the experimental results are presented on the phase equilibrium conditions for the hydrate-bearing soils (HBS) at different initial water contents, amounts of the dissolvable salt and initial vessel pressures. It is shown that a unique relationship exists between the unhydrated liquid water content and the temperature shift induced by capillary and osmotic effects, if the total amount of the dissolvable salt in the pore water is given. A theoretical model is developed, which can describe a general relationship among pressure, temperature and unhydrated water content for the hydrate-bearing soils in equilibrium. It is shown that the experimental results obtained under different experimental conditions can be very well described by the proposed model. In particular, the new model predicts that, independent of pressure and temperature, the liquid water content can be one-to-one related to the temperature shift to the extent that the total amount of the dissolvable salt is specified. Based on this, a new procedure is proposed to predict the dissociate curves associated with hydrate dissociation under different experimental conditions.
资助项目	National Science Foundation of China (NSFC)[51939011] ; National Science Foundation of China (NSFC)[51639008] ; National Science Foundation of China (NSFC)[11962004] ; National Science Foundation of China (NSFC)[41602312] ; National Science Foundation of China (NSFC)[41572293]
WOS研究方向	Energy & Fuels ; Engineering
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000651814900039
内容类型	期刊论文
源URL	[http://119.78.100.198/handle/2S6PX9GI/27096]
专题	中科院武汉岩土力学所
通讯作者	Wei, Changfu
作者单位	1.Chinese Acad Sci, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Wuhan 430071, Peoples R China 2.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
推荐引用方式 GB/T 7714	Liang, Wenpeng,Zhou, Jiazuo,Wei, Changfu. Uniqueness of the equilibrium relationship among temperature, pressure and liquid water content in hydrate-bearing soils[J]. JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,2021,88:9.
APA	Liang, Wenpeng,Zhou, Jiazuo,&Wei, Changfu.(2021).Uniqueness of the equilibrium relationship among temperature, pressure and liquid water content in hydrate-bearing soils.JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING,88,9.
MLA	Liang, Wenpeng,et al."Uniqueness of the equilibrium relationship among temperature, pressure and liquid water content in hydrate-bearing soils".JOURNAL OF NATURAL GAS SCIENCE AND ENGINEERING 88(2021):9.