Effects of Salinity on Formation Behavior of Methane Hydrate in Montmorillonite
In marine sediments, seawater influences the phase behavior of natural gas hydrate. As a porous medium, the water distribution and physical properties of montmorillonite are influenced by the salt ions in seawater. In this work, the bound-water content in, and crystal structure of, montmorillonite i...
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ftchacadsciegiec:oai:ir.giec.ac.cn:344007/26850 2023-05-15T17:11:39+02:00 Effects of Salinity on Formation Behavior of Methane Hydrate in Montmorillonite Tao, Yuanqing Yan, Kefeng Li, Xiaosen Chen, Zhaoyang Yu, Yisong Xu, Chungang 2020 http://ir.giec.ac.cn/handle/344007/26850 https://doi.org/10.3390/en13010231 英语 eng MDPI ENERGIES http://ir.giec.ac.cn/handle/344007/26850 doi:10.3390/en13010231 natural gas hydrate montmorillonite salt ions bound water NATURAL-GAS HYDRATE SOUTH CHINA SEA MOLECULAR-DYNAMICS SIMULATION CLAY MINERAL DISTRIBUTION DISSOCIATION CONDITIONS EQUILIBRIUM CONDITIONS SWELLING BEHAVIOR SURFACE SEDIMENTS PORE-WATER STABILITY Energy & Fuels 期刊论文 2020 ftchacadsciegiec https://doi.org/10.3390/en13010231 2022-09-23T14:15:46Z In marine sediments, seawater influences the phase behavior of natural gas hydrate. As a porous medium, the water distribution and physical properties of montmorillonite are influenced by the salt ions in seawater. In this work, the bound-water content in, and crystal structure of, montmorillonite is measured to investigate the effect of salt ions on the water distribution in montmorillonite. It can be determined from the results that the bound-water content in montmorillonite decreases as the salt-ion concentration increases. Salt ions affect the intercalation of water molecules in montmorillonite, and they then inhibit the expansion effect of montmorillonite. Next, the phase behaviors of methane hydrate in montmorillonite with NaCl solution are investigated using high-pressure micro-differential scanning calorimetry. The phase behavior of hydrate in montmorillonite with NaCl solution is discussed. In montmorillonite with NaCl solution, the phase equilibrium temperatures and the conversion rate of methane hydrate both decrease with increasing NaCl concentration. The results show that methane hydrate in montmorillonite is influenced not only by the phase-equilibrium effect of salt ions, but also by the formation effect of the salt ions on the bound-water content in montmorillonite. Report Methane hydrate Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences: GIEC OpenIR Energies 13 1 231 |
institution |
Open Polar |
collection |
Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences: GIEC OpenIR |
op_collection_id |
ftchacadsciegiec |
language |
English |
topic |
natural gas hydrate montmorillonite salt ions bound water NATURAL-GAS HYDRATE SOUTH CHINA SEA MOLECULAR-DYNAMICS SIMULATION CLAY MINERAL DISTRIBUTION DISSOCIATION CONDITIONS EQUILIBRIUM CONDITIONS SWELLING BEHAVIOR SURFACE SEDIMENTS PORE-WATER STABILITY Energy & Fuels |
spellingShingle |
natural gas hydrate montmorillonite salt ions bound water NATURAL-GAS HYDRATE SOUTH CHINA SEA MOLECULAR-DYNAMICS SIMULATION CLAY MINERAL DISTRIBUTION DISSOCIATION CONDITIONS EQUILIBRIUM CONDITIONS SWELLING BEHAVIOR SURFACE SEDIMENTS PORE-WATER STABILITY Energy & Fuels Tao, Yuanqing Yan, Kefeng Li, Xiaosen Chen, Zhaoyang Yu, Yisong Xu, Chungang Effects of Salinity on Formation Behavior of Methane Hydrate in Montmorillonite |
topic_facet |
natural gas hydrate montmorillonite salt ions bound water NATURAL-GAS HYDRATE SOUTH CHINA SEA MOLECULAR-DYNAMICS SIMULATION CLAY MINERAL DISTRIBUTION DISSOCIATION CONDITIONS EQUILIBRIUM CONDITIONS SWELLING BEHAVIOR SURFACE SEDIMENTS PORE-WATER STABILITY Energy & Fuels |
description |
In marine sediments, seawater influences the phase behavior of natural gas hydrate. As a porous medium, the water distribution and physical properties of montmorillonite are influenced by the salt ions in seawater. In this work, the bound-water content in, and crystal structure of, montmorillonite is measured to investigate the effect of salt ions on the water distribution in montmorillonite. It can be determined from the results that the bound-water content in montmorillonite decreases as the salt-ion concentration increases. Salt ions affect the intercalation of water molecules in montmorillonite, and they then inhibit the expansion effect of montmorillonite. Next, the phase behaviors of methane hydrate in montmorillonite with NaCl solution are investigated using high-pressure micro-differential scanning calorimetry. The phase behavior of hydrate in montmorillonite with NaCl solution is discussed. In montmorillonite with NaCl solution, the phase equilibrium temperatures and the conversion rate of methane hydrate both decrease with increasing NaCl concentration. The results show that methane hydrate in montmorillonite is influenced not only by the phase-equilibrium effect of salt ions, but also by the formation effect of the salt ions on the bound-water content in montmorillonite. |
format |
Report |
author |
Tao, Yuanqing Yan, Kefeng Li, Xiaosen Chen, Zhaoyang Yu, Yisong Xu, Chungang |
author_facet |
Tao, Yuanqing Yan, Kefeng Li, Xiaosen Chen, Zhaoyang Yu, Yisong Xu, Chungang |
author_sort |
Tao, Yuanqing |
title |
Effects of Salinity on Formation Behavior of Methane Hydrate in Montmorillonite |
title_short |
Effects of Salinity on Formation Behavior of Methane Hydrate in Montmorillonite |
title_full |
Effects of Salinity on Formation Behavior of Methane Hydrate in Montmorillonite |
title_fullStr |
Effects of Salinity on Formation Behavior of Methane Hydrate in Montmorillonite |
title_full_unstemmed |
Effects of Salinity on Formation Behavior of Methane Hydrate in Montmorillonite |
title_sort |
effects of salinity on formation behavior of methane hydrate in montmorillonite |
publisher |
MDPI |
publishDate |
2020 |
url |
http://ir.giec.ac.cn/handle/344007/26850 https://doi.org/10.3390/en13010231 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_relation |
ENERGIES http://ir.giec.ac.cn/handle/344007/26850 doi:10.3390/en13010231 |
op_doi |
https://doi.org/10.3390/en13010231 |
container_title |
Energies |
container_volume |
13 |
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1 |
container_start_page |
231 |
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1766068422792183808 |