Methane hydrate formation and dissociation behaviors in montmorillonite

doi:10.1016/j.cjche.2018.11.025

Chinese Journal of Chemical Engineering ›› 2019, Vol. 27 ›› Issue (5): 1212-1218.DOI: 10.1016/j.cjche.2018.11.025

• Energy, Resources and Environmental Technology • Previous Articles Next Articles

Methane hydrate formation and dissociation behaviors in montmorillonite

Kefeng Yan, Xiaosen Li, Zhaoyang Chen, Yu Zhang, Chungang Xu, Zhiming Xia

Key Laboratory of Gas Hydrate, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China;Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China;University of Chinese Academy of Sciences, Beijing 100049, China;Guangzhou Center for Gas Hydrate Research, Chinese Academy of Sciences, Guangzhou 510640, China

Received:2018-07-28 Revised:2018-11-06 Online:2019-06-27 Published:2019-05-28
Contact: Xiaosen Li
Supported by:
Supported by the Key Program of National Natural Science Foundation of China (51736009), the Natural Science Foundation of Guangdong Province of China (2017A030313301), the Special project for marine economy development of Guangdong Province (GDME-2018D002), the National Key R&D Program of China (2016YFC0304002, 2017YFC0307306), the Science and Technology Apparatus Development Program of the Chinese Academy of Sciences (YZ201619), the National Natural Science Foundation of China (51476147, 51879254), and the Frontier Sciences Key Research Program of the Chinese Academy of Sciences (QYZDJ-SSW-JSC033).

Methane hydrate formation and dissociation behaviors in montmorillonite

Kefeng Yan, Xiaosen Li, Zhaoyang Chen, Yu Zhang, Chungang Xu, Zhiming Xia

Key Laboratory of Gas Hydrate, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, China;Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, China;University of Chinese Academy of Sciences, Beijing 100049, China;Guangzhou Center for Gas Hydrate Research, Chinese Academy of Sciences, Guangzhou 510640, China

通讯作者: Xiaosen Li
基金资助:
Supported by the Key Program of National Natural Science Foundation of China (51736009), the Natural Science Foundation of Guangdong Province of China (2017A030313301), the Special project for marine economy development of Guangdong Province (GDME-2018D002), the National Key R&D Program of China (2016YFC0304002, 2017YFC0307306), the Science and Technology Apparatus Development Program of the Chinese Academy of Sciences (YZ201619), the National Natural Science Foundation of China (51476147, 51879254), and the Frontier Sciences Key Research Program of the Chinese Academy of Sciences (QYZDJ-SSW-JSC033).

Abstract

Abstract: The methane hydrate formation and the methane hydrate dissociation behaviors in montmorillonite are experimentally studied. Through the analyses of the microstructure characteristic, the study obtains the porous characteristic of montmorillonite. It is indicated that methane hydrate in montmorillonite forms the structure I (sI) crystal. Meanwhile, molecular dynamics simulation is carried out to study the processes of the methane hydrate formation and the methane hydrate dissociation in montmorillonite. The microstructure and microscopic properties are analyzed. The methane hydrate formation and methane hydrate dissociation mechanisms in the montmorillonite nanopore and on the montmorillonite surface are expounded. Combining the experimental and simulating analyses, the results indicate the methane hydrate formation and methane hydrate dissociation processes have little influence upon the crystal structure of porous media from either micro-or macro-analysis. It is beneficial to the fundamental researches on the exploitation and security control technologies of natural gas hydrate in deep-sea sediments.

Key words: Methane hydrate, Porous media, Formation/dissociation behavior, Molecular dynamics simulation

摘要： The methane hydrate formation and the methane hydrate dissociation behaviors in montmorillonite are experimentally studied. Through the analyses of the microstructure characteristic, the study obtains the porous characteristic of montmorillonite. It is indicated that methane hydrate in montmorillonite forms the structure I (sI) crystal. Meanwhile, molecular dynamics simulation is carried out to study the processes of the methane hydrate formation and the methane hydrate dissociation in montmorillonite. The microstructure and microscopic properties are analyzed. The methane hydrate formation and methane hydrate dissociation mechanisms in the montmorillonite nanopore and on the montmorillonite surface are expounded. Combining the experimental and simulating analyses, the results indicate the methane hydrate formation and methane hydrate dissociation processes have little influence upon the crystal structure of porous media from either micro-or macro-analysis. It is beneficial to the fundamental researches on the exploitation and security control technologies of natural gas hydrate in deep-sea sediments.

关键词: Methane hydrate, Porous media, Formation/dissociation behavior, Molecular dynamics simulation

Kefeng Yan, Xiaosen Li, Zhaoyang Chen, Yu Zhang, Chungang Xu, Zhiming Xia. Methane hydrate formation and dissociation behaviors in montmorillonite[J]. Chinese Journal of Chemical Engineering, 2019, 27(5): 1212-1218.

Kefeng Yan, Xiaosen Li, Zhaoyang Chen, Yu Zhang, Chungang Xu, Zhiming Xia. Methane hydrate formation and dissociation behaviors in montmorillonite[J]. 中国化学工程学报, 2019, 27(5): 1212-1218.

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Methane hydrate formation and dissociation behaviors in montmorillonite

Methane hydrate formation and dissociation behaviors in montmorillonite

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