Effects of the NaCl Concentration and Montmorillonite Content on Formation Kinetics of Methane Hydrate
Most resources of natural gas hydrate (NGH) exist in marine sediments where salts and sea mud are involved. It is of great importance to investigate the effects of salts and sea mud on NGH formation kinetics. In this study, the mixture of silica sand and montmorillonite was used to mimic sea mud. Th...
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ftchacadsciegiec:oai:ir.giec.ac.cn:344007/36122 2023-12-24T10:18:33+01:00 Effects of the NaCl Concentration and Montmorillonite Content on Formation Kinetics of Methane Hydrate Zeng, Haopeng Zhang, Yu Zhang, Lei Chen, Zhaoyang Li, Xiaosen 2022-04-01 http://ir.giec.ac.cn/handle/344007/36121 http://ir.giec.ac.cn/handle/344007/36122 https://doi.org/10.3390/jmse10040548 英语 eng MDPI JOURNAL OF MARINE SCIENCE AND ENGINEERING http://ir.giec.ac.cn/handle/344007/36121 http://ir.giec.ac.cn/handle/344007/36122 doi:10.3390/jmse10040548 methane hydrate NaCl concentration montmorillonite hydrate formation kinetic CLAY MINERAL DISTRIBUTION NATURAL-GAS HYDRATE SOUTH CHINA SEA SURFACE SEDIMENTS DISSOCIATION PHASE BASIN BED Engineering Oceanography Marine Ocean 期刊论文 2022 ftchacadsciegiec https://doi.org/10.3390/jmse10040548 2023-11-24T01:15:36Z Most resources of natural gas hydrate (NGH) exist in marine sediments where salts and sea mud are involved. It is of great importance to investigate the effects of salts and sea mud on NGH formation kinetics. In this study, the mixture of silica sand and montmorillonite was used to mimic sea mud. The effects of the NaCl concentration of pore water and montmorillonite content on methane hydrate formation were studied. A low NaCl concentration of 0.2 mol/L and a low montmorillonite content range of 10-25 wt% is beneficial to reduce the induction time of hydrate formation. The high NaCl concentration and high content of montmorillonite will significantly increase the induction time. The average induction time for the experiments with the NaCl concentrations of 0, 0.2, 0.6, and 1.2 mol/L is 20.99, 8.11, 15.74, and 30.88 h, respectively. In the pure silica sand, the NaCl concentration of 0.2 mol/L can improve the final water conversion. In the experiments with pure water, the water conversion increases with the increase of the montmorillonite content due to the improvement of the dispersion of montmorillonite to water. The water conversion of the experiments in pure water with the montmorillonite contents of 0, 10, 25 and 40 wt% is 12.14% (+/- 1.06%), 24.68% (+/- 1.49%), 29.59% (+/- 2.30%), and 32.57% (+/- 1.64%), respectively. In the case of both montmorillonite and NaCl existing, there is a complicated change in the water conversion. In general, the increase of the NaCl concentration enhances the inhibition of hydrate formation and reduces the final water conversion, which is the key factor affecting the final water conversion. The average water conversion of the experiments under the NaCl concentrations of 0, 0.2, 0.6 and 1.2 mol/L is 24.74, 15.14, 8.85, and 5.74%, respectively. Report Methane hydrate Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences: GIEC OpenIR Journal of Marine Science and Engineering 10 4 548 |
institution |
Open Polar |
collection |
Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences: GIEC OpenIR |
op_collection_id |
ftchacadsciegiec |
language |
English |
topic |
methane hydrate NaCl concentration montmorillonite hydrate formation kinetic CLAY MINERAL DISTRIBUTION NATURAL-GAS HYDRATE SOUTH CHINA SEA SURFACE SEDIMENTS DISSOCIATION PHASE BASIN BED Engineering Oceanography Marine Ocean |
spellingShingle |
methane hydrate NaCl concentration montmorillonite hydrate formation kinetic CLAY MINERAL DISTRIBUTION NATURAL-GAS HYDRATE SOUTH CHINA SEA SURFACE SEDIMENTS DISSOCIATION PHASE BASIN BED Engineering Oceanography Marine Ocean Zeng, Haopeng Zhang, Yu Zhang, Lei Chen, Zhaoyang Li, Xiaosen Effects of the NaCl Concentration and Montmorillonite Content on Formation Kinetics of Methane Hydrate |
topic_facet |
methane hydrate NaCl concentration montmorillonite hydrate formation kinetic CLAY MINERAL DISTRIBUTION NATURAL-GAS HYDRATE SOUTH CHINA SEA SURFACE SEDIMENTS DISSOCIATION PHASE BASIN BED Engineering Oceanography Marine Ocean |
description |
Most resources of natural gas hydrate (NGH) exist in marine sediments where salts and sea mud are involved. It is of great importance to investigate the effects of salts and sea mud on NGH formation kinetics. In this study, the mixture of silica sand and montmorillonite was used to mimic sea mud. The effects of the NaCl concentration of pore water and montmorillonite content on methane hydrate formation were studied. A low NaCl concentration of 0.2 mol/L and a low montmorillonite content range of 10-25 wt% is beneficial to reduce the induction time of hydrate formation. The high NaCl concentration and high content of montmorillonite will significantly increase the induction time. The average induction time for the experiments with the NaCl concentrations of 0, 0.2, 0.6, and 1.2 mol/L is 20.99, 8.11, 15.74, and 30.88 h, respectively. In the pure silica sand, the NaCl concentration of 0.2 mol/L can improve the final water conversion. In the experiments with pure water, the water conversion increases with the increase of the montmorillonite content due to the improvement of the dispersion of montmorillonite to water. The water conversion of the experiments in pure water with the montmorillonite contents of 0, 10, 25 and 40 wt% is 12.14% (+/- 1.06%), 24.68% (+/- 1.49%), 29.59% (+/- 2.30%), and 32.57% (+/- 1.64%), respectively. In the case of both montmorillonite and NaCl existing, there is a complicated change in the water conversion. In general, the increase of the NaCl concentration enhances the inhibition of hydrate formation and reduces the final water conversion, which is the key factor affecting the final water conversion. The average water conversion of the experiments under the NaCl concentrations of 0, 0.2, 0.6 and 1.2 mol/L is 24.74, 15.14, 8.85, and 5.74%, respectively. |
format |
Report |
author |
Zeng, Haopeng Zhang, Yu Zhang, Lei Chen, Zhaoyang Li, Xiaosen |
author_facet |
Zeng, Haopeng Zhang, Yu Zhang, Lei Chen, Zhaoyang Li, Xiaosen |
author_sort |
Zeng, Haopeng |
title |
Effects of the NaCl Concentration and Montmorillonite Content on Formation Kinetics of Methane Hydrate |
title_short |
Effects of the NaCl Concentration and Montmorillonite Content on Formation Kinetics of Methane Hydrate |
title_full |
Effects of the NaCl Concentration and Montmorillonite Content on Formation Kinetics of Methane Hydrate |
title_fullStr |
Effects of the NaCl Concentration and Montmorillonite Content on Formation Kinetics of Methane Hydrate |
title_full_unstemmed |
Effects of the NaCl Concentration and Montmorillonite Content on Formation Kinetics of Methane Hydrate |
title_sort |
effects of the nacl concentration and montmorillonite content on formation kinetics of methane hydrate |
publisher |
MDPI |
publishDate |
2022 |
url |
http://ir.giec.ac.cn/handle/344007/36121 http://ir.giec.ac.cn/handle/344007/36122 https://doi.org/10.3390/jmse10040548 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_relation |
JOURNAL OF MARINE SCIENCE AND ENGINEERING http://ir.giec.ac.cn/handle/344007/36121 http://ir.giec.ac.cn/handle/344007/36122 doi:10.3390/jmse10040548 |
op_doi |
https://doi.org/10.3390/jmse10040548 |
container_title |
Journal of Marine Science and Engineering |
container_volume |
10 |
container_issue |
4 |
container_start_page |
548 |
_version_ |
1786207586205302784 |