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Methane hydrate formation kinetics in bottom seawater and cold-seep fluids

文献类型：期刊论文

作者Zhang, Yitong1,3,4,5; Zhao, Kuan2; Ma, Liang1,3,5; He, Wanying4; Xi, Shichuan4; Luan, Zhendong1,3,5; Zhang, Xin1,3,4,5; Du, Zengfeng1,3,5
刊名CHEMICAL ENGINEERING JOURNAL
出版日期2025-07-01
卷号515页码:13
关键词Hydrate formation kinetics Methane hydrate Time-series Raman spectroscopy Bottom seawater Cold-seep fluids
ISSN号1385-8947
DOI10.1016/j.cej.2025.163547
通讯作者Zhang, Xin(xzhang@qdio.ac.cn) ; Du, Zengfeng(duzengfeng@qdio.ac.cn)
英文摘要Methane hydrate is a widely distributed energy resource in nature, mostly in marine continental margins. Understanding methane hydrate formation kinetics in natural fluids is essential for practical applications of hydrates, such as fluid selection for gas storage and separation. The effect of fluid environment on hydrate formation has been identified. However, laboratory experiments typically employ pure water and artificial seawater, leading to unclear hydrate formation kinetics in natural fluids. Therefore, further exploration of methane hydrate formation kinetics in complex environments is required for hydrate utilization and development. This study explored the microscopic methane hydrate formation process in pure water, bottom seawater, and cold-seep fluids from both temporal and spatial morphology perspectives using Raman spectroscopy. Detailed variations in methane hydrate nucleation kinetics were observed at ten-second intervals, and the evolution of dissolved and hydrated methane was analyzed for various fluids. Results showed that high salinity bottom seawater (salt ion concentrations 1.5 times that of cold-seep fluids) significantly decreased dissolved methane solubility (30%), prolonged induction time (24%), reduced the overall conversion ratio (5%) and rate of hydrated methane (20%), and inhibited the relative occupancy rate of small cages (25%). Although low salinity cold-seep fluids with tiny particles slightly decreased dissolved methane solubility and prolonged induction time, it promoted stable sI hydrate formation. Spatial morphology observations indicated that fluids affected hydrate formation morphology without significantly affecting spatial distribution characteristics. This work provides fundamental kinetic characteristics of methane hydrate formation in natural environments and sheds light on fluid selection for gas storage and separation.
WOS关键词GAS HYDRATE ; PHASE-EQUILIBRIUM ; NATURAL-GAS ; STRUCTURAL STABILITY ; RAMAN ; WATER ; NACL ; SOLUBILITY ; PRESSURE ; DISSOCIATION
资助项目National Natural Science Foundation of China[42327805] ; National Natural Science Foundation of China[42476180] ; National Natural Science Foundation of China[42221005] ; Key Laboratory of Ocean Observation and Information of Hainan Province[HKLOOI-OF-2023-05]
WOS研究方向Engineering
语种英语
WOS记录号WOS:001491402600012
出版者ELSEVIER SCIENCE SA
源URL[http://ir.qdio.ac.cn/handle/337002/202076]  
专题海洋研究所_海洋地质与环境重点实验室
通讯作者Zhang, Xin; Du, Zengfeng
作者单位1.Chinese Acad Sci, Ctr Deep Sea Res, Inst Oceanol, Ctr Ocean Mega Sci, Qingdao 266071, Peoples R China
2.Key Lab Ocean Observat & Informat Hainan Prov, Sanya 572000, Peoples R China
3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China
4.Laoshan Lab, Qingdao 266237, Peoples R China
5.Chinese Acad Sci, Key Lab Ocean Observat & Forecasting, Key Lab Marine Geol & Environm, Qingdao 266071, Peoples R China
推荐引用方式
GB/T 7714		 Zhang, Yitong,Zhao, Kuan,Ma, Liang,et al. Methane hydrate formation kinetics in bottom seawater and cold-seep fluids[J]. CHEMICAL ENGINEERING JOURNAL,2025,515:13.
APA Zhang, Yitong.,Zhao, Kuan.,Ma, Liang.,He, Wanying.,Xi, Shichuan.,...&Du, Zengfeng.(2025).Methane hydrate formation kinetics in bottom seawater and cold-seep fluids.CHEMICAL ENGINEERING JOURNAL,515,13.
MLA Zhang, Yitong,et al."Methane hydrate formation kinetics in bottom seawater and cold-seep fluids".CHEMICAL ENGINEERING JOURNAL 515(2025):13.

入库方式： OAI收割

来源：海洋研究所

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