Methane hydrate formation and dissociation behaviors in montmorillonite

The methane hydrate formation and the methane hydrate dissociation behaviors in montmorillonite arc experimentally studied. Through the analyses of the microstructure characteristic, the study obtains the porous characteristic of montmorillonite. It is indicated that methane hydrate in montmorilloni...

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Bibliographic Details
Published in:Chinese Journal of Chemical Engineering
Main Authors: Yan, Kefeng, Li, Xiaosen, Chen, Zhaoyang, Zhang, Yu, Xu, Chungang, Xia, Zhiming
Format: Report
Language:English
Published: CHEMICAL INDUSTRY PRESS 2019
Subjects:
Methane hydrate
Porous media
Formation/dissociation behavior
Molecular dynamics simulation
MOLECULAR-DYNAMICS SIMULATIONS
WATER
NUCLEATION
CAPTURE
CO2
SEPARATION
SURFACES
MODELS
Engineering
Chemical
Online Access:http://ir.giec.ac.cn/handle/344007/25248
http://ir.giec.ac.cn/handle/344007/25249
https://doi.org/10.1016/j.cjche.2018.11.025
Description
Summary:The methane hydrate formation and the methane hydrate dissociation behaviors in montmorillonite arc 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 arc 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. (C) 2018 The Chemical Industry and Engineering Society of China, and Chemical Industry Press Co., Ltd. All rights reserved.

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