Different Mechanism Effect between Gas-Solid and Liquid-Solid Interface on the Three-Phase Coexistence Hydrate System Dissociation in Seawater: A Molecular Dynamics Simulation Study
Almost 98% of methane hydrate is stored in the seawater environment, the study of microscopic mechanism for methane hydrate dissociation on the sea floor is of great significance to the development of hydrate production, involving a three-phase coexistence system of seawater (3.5% NaCl) + hydrate +...
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ftmdpi:oai:mdpi.com:/1996-1073/11/1/6/ 2023-08-20T04:07:56+02:00 Different Mechanism Effect between Gas-Solid and Liquid-Solid Interface on the Three-Phase Coexistence Hydrate System Dissociation in Seawater: A Molecular Dynamics Simulation Study Zhixue Sun Haoxuan Wang Jun Yao Chengwei Yang Jianlong Kou Kelvin Bongole Ying Xin Weina Li Xuchen Zhu 2017-12-21 application/pdf https://doi.org/10.3390/en11010006 EN eng Multidisciplinary Digital Publishing Institute https://dx.doi.org/10.3390/en11010006 https://creativecommons.org/licenses/by/4.0/ Energies; Volume 11; Issue 1; Pages: 6 methane hydrate adjacent phase dissociation rate molecular dynamic simulation Text 2017 ftmdpi https://doi.org/10.3390/en11010006 2023-07-31T21:19:22Z Almost 98% of methane hydrate is stored in the seawater environment, the study of microscopic mechanism for methane hydrate dissociation on the sea floor is of great significance to the development of hydrate production, involving a three-phase coexistence system of seawater (3.5% NaCl) + hydrate + methane gas. The molecular dynamics method is used to simulate the hydrate dissociation process. The dissociation of hydrate system depends on diffusion of methane molecules from partially open cages and a layer by layer breakdown of the closed cages. The presence of liquid or gas phases adjacent to the hydrate has an effect on the rate of hydrate dissociation. At the beginning of dissociation process, hydrate layers that are in contact with liquid phase dissociated faster than layers adjacent to the gas phase. As the dissociation continues, the thickness of water film near the hydrate-liquid interface became larger than the hydrate-gas interface giving more resistance to the hydrate dissociation. Dissociation rate of hydrate layers adjacent to gas phase gradually exceeds the dissociation rate of layers adjacent to the liquid phase. The difficulty of methane diffusion in the hydrate-liquid side also brings about change in dissociation rate. Text Methane hydrate MDPI Open Access Publishing Energies 11 1 6 |
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MDPI Open Access Publishing |
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ftmdpi |
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topic |
methane hydrate adjacent phase dissociation rate molecular dynamic simulation |
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methane hydrate adjacent phase dissociation rate molecular dynamic simulation Zhixue Sun Haoxuan Wang Jun Yao Chengwei Yang Jianlong Kou Kelvin Bongole Ying Xin Weina Li Xuchen Zhu Different Mechanism Effect between Gas-Solid and Liquid-Solid Interface on the Three-Phase Coexistence Hydrate System Dissociation in Seawater: A Molecular Dynamics Simulation Study |
topic_facet |
methane hydrate adjacent phase dissociation rate molecular dynamic simulation |
description |
Almost 98% of methane hydrate is stored in the seawater environment, the study of microscopic mechanism for methane hydrate dissociation on the sea floor is of great significance to the development of hydrate production, involving a three-phase coexistence system of seawater (3.5% NaCl) + hydrate + methane gas. The molecular dynamics method is used to simulate the hydrate dissociation process. The dissociation of hydrate system depends on diffusion of methane molecules from partially open cages and a layer by layer breakdown of the closed cages. The presence of liquid or gas phases adjacent to the hydrate has an effect on the rate of hydrate dissociation. At the beginning of dissociation process, hydrate layers that are in contact with liquid phase dissociated faster than layers adjacent to the gas phase. As the dissociation continues, the thickness of water film near the hydrate-liquid interface became larger than the hydrate-gas interface giving more resistance to the hydrate dissociation. Dissociation rate of hydrate layers adjacent to gas phase gradually exceeds the dissociation rate of layers adjacent to the liquid phase. The difficulty of methane diffusion in the hydrate-liquid side also brings about change in dissociation rate. |
format |
Text |
author |
Zhixue Sun Haoxuan Wang Jun Yao Chengwei Yang Jianlong Kou Kelvin Bongole Ying Xin Weina Li Xuchen Zhu |
author_facet |
Zhixue Sun Haoxuan Wang Jun Yao Chengwei Yang Jianlong Kou Kelvin Bongole Ying Xin Weina Li Xuchen Zhu |
author_sort |
Zhixue Sun |
title |
Different Mechanism Effect between Gas-Solid and Liquid-Solid Interface on the Three-Phase Coexistence Hydrate System Dissociation in Seawater: A Molecular Dynamics Simulation Study |
title_short |
Different Mechanism Effect between Gas-Solid and Liquid-Solid Interface on the Three-Phase Coexistence Hydrate System Dissociation in Seawater: A Molecular Dynamics Simulation Study |
title_full |
Different Mechanism Effect between Gas-Solid and Liquid-Solid Interface on the Three-Phase Coexistence Hydrate System Dissociation in Seawater: A Molecular Dynamics Simulation Study |
title_fullStr |
Different Mechanism Effect between Gas-Solid and Liquid-Solid Interface on the Three-Phase Coexistence Hydrate System Dissociation in Seawater: A Molecular Dynamics Simulation Study |
title_full_unstemmed |
Different Mechanism Effect between Gas-Solid and Liquid-Solid Interface on the Three-Phase Coexistence Hydrate System Dissociation in Seawater: A Molecular Dynamics Simulation Study |
title_sort |
different mechanism effect between gas-solid and liquid-solid interface on the three-phase coexistence hydrate system dissociation in seawater: a molecular dynamics simulation study |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2017 |
url |
https://doi.org/10.3390/en11010006 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_source |
Energies; Volume 11; Issue 1; Pages: 6 |
op_relation |
https://dx.doi.org/10.3390/en11010006 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/en11010006 |
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Energies |
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11 |
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6 |
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1774719933852155904 |