Promotion of Activated Carbon on the Nucleation and Growth Kinetics of Methane Hydrates
Due to the hybrid effect of physical adsorption and hydration, methane storage capacity in pre-adsorbed water-activated carbon (PW-AC) under hydrate favorable conditions is impressive, and fast nucleation and growth kinetics are also anticipated. Those fantastic natures suggest the PW-AC-based hydra...
| Main Authors: | , , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Frontiers Media S.A.
2020-10-01
|
| Series: | Frontiers in Chemistry |
| Subjects: | |
| Online Access: | https://www.frontiersin.org/article/10.3389/fchem.2020.526101/full |
| _version_ | 1819008573583130624 |
|---|---|
| author | Guodong Zhang Guodong Zhang Xiaoyun Shi Runcheng Zhang Kun Chao Fei Wang |
| author_facet | Guodong Zhang Guodong Zhang Xiaoyun Shi Runcheng Zhang Kun Chao Fei Wang |
| author_sort | Guodong Zhang |
| collection | DOAJ |
| description | Due to the hybrid effect of physical adsorption and hydration, methane storage capacity in pre-adsorbed water-activated carbon (PW-AC) under hydrate favorable conditions is impressive, and fast nucleation and growth kinetics are also anticipated. Those fantastic natures suggest the PW-AC-based hydrates to be a promising alternative for methane storage and transportation. However, hydrate formation refers to multiscale processes, the nucleation kinetics at molecule scale give rise to macrohydrate formation, and the presence of activated carbon (AC) causes this to be more complicated. Although adequate nucleation sites induced by abundant specific surface area and pore texture were reported to correspond to fast formation kinetics at macroperspective, the micronature behind that is still ambiguous. Here, we evaluated how methane would be adsorbed on PW-AC under hydrate favorable conditions to improve the understanding of hydrate fast nucleation and growth kinetics. Microbulges on AC surface were confirmed to provide numerous nucleation sites, suggesting the contribution of abundant specific surface area of AC to fast hydrate nucleation and growth kinetics. In addition, two-way convection of water and methane molecules in micropores induced by methane physical adsorption further increases gas–liquid contact at molecular scale, which may constitute the nature of confinement effect of nanopore space. |
| first_indexed | 2024-12-21T00:42:37Z |
| format | Article |
| id | doaj.art-0a92763d12464ec39729c51e9ee4558d |
| institution | Directory Open Access Journal |
| issn | 2296-2646 |
| language | English |
| last_indexed | 2024-12-21T00:42:37Z |
| publishDate | 2020-10-01 |
| publisher | Frontiers Media S.A. |
| record_format | Article |
| series | Frontiers in Chemistry |
| spelling | doaj.art-0a92763d12464ec39729c51e9ee4558d2022-12-21T19:21:37ZengFrontiers Media S.A.Frontiers in Chemistry2296-26462020-10-01810.3389/fchem.2020.526101526101Promotion of Activated Carbon on the Nucleation and Growth Kinetics of Methane HydratesGuodong Zhang0Guodong Zhang1Xiaoyun Shi2Runcheng Zhang3Kun Chao4Fei Wang5College of Electromechanical Engineering, Shandong Engineering Laboratory for Preparation and Application of High-Performance Carbon-Materials, Qingdao University of Science and Technology, Qingdao, ChinaKey Laboratory of Unconventional Oil & Gas Development [China University of Petroleum (East China)], Ministry of Education, Qingdao, ChinaCollege of Electromechanical Engineering, Shandong Engineering Laboratory for Preparation and Application of High-Performance Carbon-Materials, Qingdao University of Science and Technology, Qingdao, ChinaCollege of Electromechanical Engineering, Shandong Engineering Laboratory for Preparation and Application of High-Performance Carbon-Materials, Qingdao University of Science and Technology, Qingdao, ChinaCollege of Electromechanical Engineering, Shandong Engineering Laboratory for Preparation and Application of High-Performance Carbon-Materials, Qingdao University of Science and Technology, Qingdao, ChinaCollege of Electromechanical Engineering, Shandong Engineering Laboratory for Preparation and Application of High-Performance Carbon-Materials, Qingdao University of Science and Technology, Qingdao, ChinaDue to the hybrid effect of physical adsorption and hydration, methane storage capacity in pre-adsorbed water-activated carbon (PW-AC) under hydrate favorable conditions is impressive, and fast nucleation and growth kinetics are also anticipated. Those fantastic natures suggest the PW-AC-based hydrates to be a promising alternative for methane storage and transportation. However, hydrate formation refers to multiscale processes, the nucleation kinetics at molecule scale give rise to macrohydrate formation, and the presence of activated carbon (AC) causes this to be more complicated. Although adequate nucleation sites induced by abundant specific surface area and pore texture were reported to correspond to fast formation kinetics at macroperspective, the micronature behind that is still ambiguous. Here, we evaluated how methane would be adsorbed on PW-AC under hydrate favorable conditions to improve the understanding of hydrate fast nucleation and growth kinetics. Microbulges on AC surface were confirmed to provide numerous nucleation sites, suggesting the contribution of abundant specific surface area of AC to fast hydrate nucleation and growth kinetics. In addition, two-way convection of water and methane molecules in micropores induced by methane physical adsorption further increases gas–liquid contact at molecular scale, which may constitute the nature of confinement effect of nanopore space.https://www.frontiersin.org/article/10.3389/fchem.2020.526101/fullmethane hydratesactivated carbonnucleation and growth kineticsconfinement effecthydrate fiberstwo-way convection mechanism |
| spellingShingle | Guodong Zhang Guodong Zhang Xiaoyun Shi Runcheng Zhang Kun Chao Fei Wang Promotion of Activated Carbon on the Nucleation and Growth Kinetics of Methane Hydrates Frontiers in Chemistry methane hydrates activated carbon nucleation and growth kinetics confinement effect hydrate fibers two-way convection mechanism |
| title | Promotion of Activated Carbon on the Nucleation and Growth Kinetics of Methane Hydrates |
| title_full | Promotion of Activated Carbon on the Nucleation and Growth Kinetics of Methane Hydrates |
| title_fullStr | Promotion of Activated Carbon on the Nucleation and Growth Kinetics of Methane Hydrates |
| title_full_unstemmed | Promotion of Activated Carbon on the Nucleation and Growth Kinetics of Methane Hydrates |
| title_short | Promotion of Activated Carbon on the Nucleation and Growth Kinetics of Methane Hydrates |
| title_sort | promotion of activated carbon on the nucleation and growth kinetics of methane hydrates |
| topic | methane hydrates activated carbon nucleation and growth kinetics confinement effect hydrate fibers two-way convection mechanism |
| url | https://www.frontiersin.org/article/10.3389/fchem.2020.526101/full |
| work_keys_str_mv | AT guodongzhang promotionofactivatedcarbononthenucleationandgrowthkineticsofmethanehydrates AT guodongzhang promotionofactivatedcarbononthenucleationandgrowthkineticsofmethanehydrates AT xiaoyunshi promotionofactivatedcarbononthenucleationandgrowthkineticsofmethanehydrates AT runchengzhang promotionofactivatedcarbononthenucleationandgrowthkineticsofmethanehydrates AT kunchao promotionofactivatedcarbononthenucleationandgrowthkineticsofmethanehydrates AT feiwang promotionofactivatedcarbononthenucleationandgrowthkineticsofmethanehydrates |