Phase equilibrium characteristics of natural gas hydrate formation at the deep-water environment of "Haima" cold seep

doi:10.1016/j.egyr.2022.04.011

GIEC OpenIR

	Phase equilibrium characteristics of natural gas hydrate formation at the deep-water environment of "Haima" cold seep
	Huang, Yanyan 1,2; Feng, Jing-Chun 1,2; Xie, Yan 1,2; Wang, Yi 3; Li, Pian 1,2; Zhang, Mingrui 1,2
	2022-11-01
发表期刊	ENERGY REPORTS
ISSN	2352-4847
卷号	8 页码:5501-5509
通讯作者	Feng, Jing-Chun(fengjc@gdut.edu.cn)
摘要	Methane seeping induced by natural gas hydrate dissociation is ubiquitous in deep-sea environment, which influences the global methane and carbon budget. Nevertheless, the phase equilibrium char-acteristics that control the stability of hydrate formation during the bubble ebullition process in the in-situ multi-component environment remain unclear. "Haima"cold seep is a typical active methane seeping environment associated with abundant methane hydrate, which necessitates unveiling the potential and stability of methane hydrate formation. This work investigated the hydrate phase equi-librium conditions based on the in-situ water depth with practical ion categories and concentrations for the first time. Results show that Sr2+ is an important ion that governs the thermal stability of methane hydrate. Mechanism of different ions categories (Ca2+, Mg2+, and Sr2+) effect on hydrate equilibria can be elucidated by the difference of charge and radius of the ion. Slightly difference of in-situ ion concentrations within the same salinity exerts on unobvious effect on hydrate formation. Moreover, the hydrate stability with H2S-bearing environment coupled with the anaerobic oxidation of methane in the deep-sea floor was enhanced compared to the CO2-bearing environment associated with aerobic oxidation of methane. Furthermore, thermal dynamic conditions of hydrate formation were less rigorous than that in the single methane environment. The response law of hydrate phase transition enthalpy was almost consistent with the phase equilibrium change. This work can give important fundamentals for the estimation of hydrate resources in the practical environment, and have insights for methane capture and fixation in the methane seeps. (C) 2022 The Author(s). Published by Elsevier Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).
关键词	Natural gas hydrate Phase equilibrium condition Cold seep Ion category Ion concentration Anaerobic/Aerobic of methane oxidation
DOI	10.1016/j.egyr.2022.04.011
关键词[WOS]	METHANE HYDRATE ; DISSOCIATION ENTHALPY ; SEA-FLOOR ; TEMPERATURE ; STABILITY ; SEDIMENTS ; PRESSURE ; VENT ; AREA
收录类别	SCI
语种	英语
资助项目	National Natural Science Foun-dation of China[42022046] ; National Natural Science Foun-dation of China[52122602] ; National Key Research and Development Program of China[2021YFF0502300] ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)[GML2019ZD0401] ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou)[GML2019ZD0403] ; Guangzhou Sci-ence and Technology Project[202102020971]
WOS研究方向	Energy & Fuels
项目资助者	National Natural Science Foun-dation of China ; National Key Research and Development Program of China ; Key Special Project for Introduced Talents Team of Southern Marine Science and Engineering Guangdong Laboratory (Guangzhou) ; Guangzhou Sci-ence and Technology Project
WOS类目	Energy & Fuels
WOS记录号	WOS:000832955600002
出版者	ELSEVIER
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.giec.ac.cn/handle/344007/37061
专题	中国科学院广州能源研究所
通讯作者	Feng, Jing-Chun
作者单位	1.Guangdong Univ Technol, Res Ctr Ecol & Environm Coastal Area & Deep Sea, Guangzhou 510006, Peoples R China 2.Guangdong Lab Guangzhou, Southern Marine Sci & Engn, Guangzhou 511458, Peoples R China 3.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China
推荐引用方式 GB/T 7714	Huang, Yanyan,Feng, Jing-Chun,Xie, Yan,et al. Phase equilibrium characteristics of natural gas hydrate formation at the deep-water environment of "Haima" cold seep[J]. ENERGY REPORTS,2022,8:5501-5509.
APA	Huang, Yanyan,Feng, Jing-Chun,Xie, Yan,Wang, Yi,Li, Pian,&Zhang, Mingrui.(2022).Phase equilibrium characteristics of natural gas hydrate formation at the deep-water environment of "Haima" cold seep.ENERGY REPORTS,8,5501-5509.
MLA	Huang, Yanyan,et al."Phase equilibrium characteristics of natural gas hydrate formation at the deep-water environment of "Haima" cold seep".ENERGY REPORTS 8(2022):5501-5509.