Effect of Residual Water in Sediments on the CO2-CH4 Replacement Process
CO2 replacement is a promising method of gas hydrate recovery. However, the influence of residual water in the replacement process and selections of a suitable mining area remain uncertain. To better understand this method, we examined the influence of the particle size and initial hydrate saturatio...
Published in: | Energies |
---|---|
Main Authors: | , , , , |
Format: | Text |
Language: | English |
Published: |
Multidisciplinary Digital Publishing Institute
2023
|
Subjects: | |
Online Access: | https://doi.org/10.3390/en16073154 |
id |
ftmdpi:oai:mdpi.com:/1996-1073/16/7/3154/ |
---|---|
record_format |
openpolar |
spelling |
ftmdpi:oai:mdpi.com:/1996-1073/16/7/3154/ 2023-08-20T04:07:58+02:00 Effect of Residual Water in Sediments on the CO2-CH4 Replacement Process Fuqin Lu Xuebing Zhou Caili Huang Dongliang Li Deqing Liang 2023-03-31 application/pdf https://doi.org/10.3390/en16073154 EN eng Multidisciplinary Digital Publishing Institute H: Geo-Energy https://dx.doi.org/10.3390/en16073154 https://creativecommons.org/licenses/by/4.0/ Energies; Volume 16; Issue 7; Pages: 3154 methane hydrate CO 2 replacement residual water sediment particle size initial hydrate saturation CH 4 recovery efficiency Text 2023 ftmdpi https://doi.org/10.3390/en16073154 2023-08-01T09:30:59Z CO2 replacement is a promising method of gas hydrate recovery. However, the influence of residual water in the replacement process and selections of a suitable mining area remain uncertain. To better understand this method, we examined the influence of the particle size and initial hydrate saturation on the replacement process while using the same amount of residual free water. The results showed that during the replacement process, two stages of rapid reaction and slow reaction occurred, which were manifested by the speed of pressure change in the reactor. The CO2 sequestration ratio decreased with the increase in sediment particle size and increased with the increase in initial hydrate saturation. During the replacement process, two reactions occurred: CH4 was replaced by CO2 and CO2 hydrate was formed, and the replacement amount and recovery efficiency of CH4 increased with a decrease in sediment particle size. When the sediment particle size was less than 166 μm, the CH4 recovery efficiency was significantly affected by the particle size. The replacement amount of CH4 increased with the increase in initial hydrate saturation, and the recovery efficiency decreased. This study provides a basis for selecting suitable hydrate-accumulation areas for on-site mining. Text Methane hydrate MDPI Open Access Publishing Energies 16 7 3154 |
institution |
Open Polar |
collection |
MDPI Open Access Publishing |
op_collection_id |
ftmdpi |
language |
English |
topic |
methane hydrate CO 2 replacement residual water sediment particle size initial hydrate saturation CH 4 recovery efficiency |
spellingShingle |
methane hydrate CO 2 replacement residual water sediment particle size initial hydrate saturation CH 4 recovery efficiency Fuqin Lu Xuebing Zhou Caili Huang Dongliang Li Deqing Liang Effect of Residual Water in Sediments on the CO2-CH4 Replacement Process |
topic_facet |
methane hydrate CO 2 replacement residual water sediment particle size initial hydrate saturation CH 4 recovery efficiency |
description |
CO2 replacement is a promising method of gas hydrate recovery. However, the influence of residual water in the replacement process and selections of a suitable mining area remain uncertain. To better understand this method, we examined the influence of the particle size and initial hydrate saturation on the replacement process while using the same amount of residual free water. The results showed that during the replacement process, two stages of rapid reaction and slow reaction occurred, which were manifested by the speed of pressure change in the reactor. The CO2 sequestration ratio decreased with the increase in sediment particle size and increased with the increase in initial hydrate saturation. During the replacement process, two reactions occurred: CH4 was replaced by CO2 and CO2 hydrate was formed, and the replacement amount and recovery efficiency of CH4 increased with a decrease in sediment particle size. When the sediment particle size was less than 166 μm, the CH4 recovery efficiency was significantly affected by the particle size. The replacement amount of CH4 increased with the increase in initial hydrate saturation, and the recovery efficiency decreased. This study provides a basis for selecting suitable hydrate-accumulation areas for on-site mining. |
format |
Text |
author |
Fuqin Lu Xuebing Zhou Caili Huang Dongliang Li Deqing Liang |
author_facet |
Fuqin Lu Xuebing Zhou Caili Huang Dongliang Li Deqing Liang |
author_sort |
Fuqin Lu |
title |
Effect of Residual Water in Sediments on the CO2-CH4 Replacement Process |
title_short |
Effect of Residual Water in Sediments on the CO2-CH4 Replacement Process |
title_full |
Effect of Residual Water in Sediments on the CO2-CH4 Replacement Process |
title_fullStr |
Effect of Residual Water in Sediments on the CO2-CH4 Replacement Process |
title_full_unstemmed |
Effect of Residual Water in Sediments on the CO2-CH4 Replacement Process |
title_sort |
effect of residual water in sediments on the co2-ch4 replacement process |
publisher |
Multidisciplinary Digital Publishing Institute |
publishDate |
2023 |
url |
https://doi.org/10.3390/en16073154 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_source |
Energies; Volume 16; Issue 7; Pages: 3154 |
op_relation |
H: Geo-Energy https://dx.doi.org/10.3390/en16073154 |
op_rights |
https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3390/en16073154 |
container_title |
Energies |
container_volume |
16 |
container_issue |
7 |
container_start_page |
3154 |
_version_ |
1774719964237791232 |