Knowledge Management System Of Guangzhou Institute of Energy Conversion, CAS
| The determining factor of hydrate dissociation rate in the sediments with different water saturations | |
Li, Xiao-Yan1,2,3,4,5; Li, Xiao-Sen1,2,3,4 ; Wang, Yi1,2,3,4; Liu, Jian-Wu1,2,3,4; Hu, Heng-Qi1,2,3,4,6
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| 2020-07-01 | |
| Source Publication | ENERGY
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| ISSN | 0360-5442 |
| Volume | 202Pages:12 |
| Corresponding Author | Li, Xiao-Sen(lixs@ms.giec.ac.cn) ; Wang, Yi(wangyi@ms.giec.ac.cn) |
| Abstract | In nature, gas hydrate is mainly distributed in permafrost region and deep ocean sediments. For these two types of hydrate reservoirs, water contents in the sediments were different. The water content has a large influence on the characteristics of heat transfer and fluid flow in the sediments, thereby affecting the hydrate dissociation behavior. In this paper, the experiments of hydrate dissociation by depressurization in sediments with different water saturations were conducted. The influences of water saturation on the pressure, the temperature, the gas production, the water production, and the hydrate dissociation rate were analyzed. The experimental results showed that, in the depressurization stage (DS), the rate of pressure dropping and the amount of hydrate reformation increased with the raise of the water saturation in the sediments. In the constant pressure stage (CPS), although the heat conduction rate of the sediments increased with the increase of the water saturation, the mass transport rate of the gas released from hydrate dissociation was limited due to the increase of water saturation. As a result, the hydrate dissociation rate decreased with the increase of the water saturation in the sediments. According to these experimental results, during the hydrate dissociation in the sediments with different water saturations, the hydrate dissociation rate is determined by the mass transport rate of the gas released from the hydrate dissociation. For the hydrate reservoirs with the high-water saturation, the hydrate dissociation rate is largely limited by the diffusion rate of gas released from hydrate dissociation. Hence, the key factor to improve the hydrate dissociation rate in the sediments with high water saturation is to increase the diffusion rate of gas in the sediments. (C) 2020 Elsevier Ltd. All rights reserved. |
| Keyword | Hydrate dissociation Depressurization Determining factor Mass transport Gas diffusion |
| DOI | 10.1016/j.energy.2020.117690 |
| WOS Keyword | EFFECTIVE THERMAL-CONDUCTIVITY ; GAS-PRODUCTION BEHAVIOR ; METHANE HYDRATE ; DEPRESSURIZATION ; CH4 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | Key Program of National Natural Science Foundation of China[51736009] ; National Natural Science Foundation of China[51676190] ; National Natural Science Foundation of China[51806251] ; Special Project for Marine Economy Development of Guangdong Province[GDME2018D002] ; Science and Technology Apparatus Development Program of the Chinese Academy of Sciences[YZ201619] ; Frontier Sciences Key Research Programof the Chinese Academy of Sciences[QYZDJ-SSW-JSC033] ; Youth Science and Technology Innovation Talent of Guangdong[2016TQ03Z862] ; Youth Innovation Promotion Association CAS[2018382] ; Natural Science Foundation of Guangdong[2017A030313313] |
| WOS Research Area | Thermodynamics ; Energy & Fuels |
| Funding Organization | Key Program of National Natural Science Foundation of China ; National Natural Science Foundation of China ; Special Project for Marine Economy Development of Guangdong Province ; Science and Technology Apparatus Development Program of the Chinese Academy of Sciences ; Frontier Sciences Key Research Programof the Chinese Academy of Sciences ; Youth Science and Technology Innovation Talent of Guangdong ; Youth Innovation Promotion Association CAS ; Natural Science Foundation of Guangdong |
| WOS Subject | Thermodynamics ; Energy & Fuels |
| WOS ID | WOS:000538592700031 |
| Publisher | PERGAMON-ELSEVIER SCIENCE LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.giec.ac.cn/handle/344007/27300 |
| Collection | 中国科学院广州能源研究所 |
| Corresponding Author | Li, Xiao-Sen; Wang, Yi |
| Affiliation | 1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Peoples R China 2.Chinese Acad Sci, Guangzhou Inst Energy Convers, Key Lab Gas Hydrate, Guangzhou 510640, Peoples R China 3.Guangdong Prov Key Lab New & Renewable Energy Res, Guangzhou 510640, Peoples R China 4.Chinese Acad Sci, Guangzhou Ctr Gas Hydrate Res, Guangzhou 510640, Peoples R China 5.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 6.Univ Sci & Technol China, Hefei 230000, Peoples R China |
| First Author Affilication | GuangZhou Institute of Energy Conversion,Chinese Academy of Sciences |
| Recommended Citation GB/T 7714 | Li, Xiao-Yan,Li, Xiao-Sen,Wang, Yi,et al. The determining factor of hydrate dissociation rate in the sediments with different water saturations[J]. ENERGY,2020,202:12. |
| APA | Li, Xiao-Yan,Li, Xiao-Sen,Wang, Yi,Liu, Jian-Wu,&Hu, Heng-Qi.(2020).The determining factor of hydrate dissociation rate in the sediments with different water saturations.ENERGY,202,12. |
| MLA | Li, Xiao-Yan,et al."The determining factor of hydrate dissociation rate in the sediments with different water saturations".ENERGY 202(2020):12. |
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