气候变化领域集成服务门户(CCPortal): Heat transfer and water migration rules during formation/dissociation of methane hydrate under temperature fields with gradient

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DOI	10.1016/j.ijheatmasstransfer.2021.120929
	Heat transfer and water migration rules during formation/dissociation of methane hydrate under temperature fields with gradient
	Zhang, Peng; Chen, Xueping; Li, Shuaijun; Wu, Qingbai; Xu, Zhengdong
发表日期	2021
ISSN	0017-9310
EISSN	1879-2189
卷号	169
英文摘要	To investigate formation and dissociation behaviors of hydrate under non uniform temperature fields and mechanisms behind, methane hydrate was formed and then dissociated within a porous medium in a reactor with fixed positive and reverse temperature gradients. Results show that owing to the water migration under temperate gradients, hydrate concentrates inside the regions at lower temperature. Under temperature gradients, hydrate distribution heterogeneity appears inside the medium during formations. During dissociation under reverse gradient, the upper half part of medium is at higher temperature. Hence, this part is easy to dehydrate with flow up from bottom to top of gas released from dissociation, resulting in emergence of significant medium deformation phenomenon. Under these non uniform temperature fields, hydrate dissociation is primarily controlled by heat transfer. Hydrate distribution heterogeneity directly relates to the water migration under temperature gradients during formation, and the medium deformations along with water discharge during dissociation. Owing to these replicated water migration and dehydration processes under reverse gradient, final hydrate saturation is gradually enhanced accompanying with the increase in formation/dissociation cycle times; on the contrary, is lowered under the positive one. These findings may provide some implications for future methane storage at industrial scale with hydrate technology, and the practical exploitations of natural gas hydrates in nature. (C) 2021 Elsevier Ltd. All rights reserved.
英文关键词	Non uniform temperature field; Gradient; Water migration; Formation/dissociation cycle
语种	英语
WOS研究方向	Thermodynamics ; Engineering ; Mechanics
WOS类目	Thermodynamics ; Engineering, Mechanical ; Mechanics
WOS关键词	STABILITY CONDITIONS ; DISSOCIATION ; STORAGE ; CLATHRATE ; DEPRESSURIZATION ; EQUILIBRIA ; SEDIMENTS ; KINETICS ; GROWTH ; FLOW
WOS记录号	WOS:000641139700034
来源期刊	INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER
来源机构	中国科学院西北生态环境资源研究院
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/240261
作者单位	[Zhang, Peng; Chen, Xueping; Li, Shuaijun; Wu, Qingbai] Chinese Acad Sci, Northwest Inst Ecoenvironm & Resources, State Key Lab Frozen Soil Engn, Lanzhou 730000, Peoples R China; [Chen, Xueping; Li, Shuaijun] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [Xu, Zhengdong] Weiyou Sci Instruments Co Ltd, Nantong 226000, Peoples R China
推荐引用方式 GB/T 7714	Zhang, Peng,Chen, Xueping,Li, Shuaijun,et al. Heat transfer and water migration rules during formation/dissociation of methane hydrate under temperature fields with gradient[J]. 中国科学院西北生态环境资源研究院,2021,169.
APA	Zhang, Peng,Chen, Xueping,Li, Shuaijun,Wu, Qingbai,&Xu, Zhengdong.(2021).Heat transfer and water migration rules during formation/dissociation of methane hydrate under temperature fields with gradient.INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,169.
MLA	Zhang, Peng,et al."Heat transfer and water migration rules during formation/dissociation of methane hydrate under temperature fields with gradient".INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 169(2021).