Mechanical Instability of Methane Hydrate–Mineral Interface Systems
Massive methane hydrates occur on sediment matrices in nature. Therefore, sediment-based methane hydrate systems play an essential role in the society and hydrate community, including energy resources, global climate changes, and geohazards. However, a fundamental understanding of mechanical propert...
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Online Access: | https://oceanrep.geomar.de/id/eprint/54219/ https://oceanrep.geomar.de/id/eprint/54219/1/Cao%20et%20al.pdf https://doi.org/10.1021/acsami.1c08114 |
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ftoceanrep:oai:oceanrep.geomar.de:54219 2023-05-15T17:11:07+02:00 Mechanical Instability of Methane Hydrate–Mineral Interface Systems Cao, Pinqiang Li, Tianshu Ning, Fulong Wu, Jianyang 2021-09-29 text https://oceanrep.geomar.de/id/eprint/54219/ https://oceanrep.geomar.de/id/eprint/54219/1/Cao%20et%20al.pdf https://doi.org/10.1021/acsami.1c08114 en eng ACS (American Chemical Society) https://oceanrep.geomar.de/id/eprint/54219/1/Cao%20et%20al.pdf Cao, P., Li, T., Ning, F. and Wu, J. (2021) Mechanical Instability of Methane Hydrate–Mineral Interface Systems. ACS Applied Materials & Interfaces, 13 (38). pp. 46043-46054. DOI 10.1021/acsami.1c08114 <https://doi.org/10.1021/acsami.1c08114>. doi:10.1021/acsami.1c08114 info:eu-repo/semantics/restrictedAccess Article PeerReviewed 2021 ftoceanrep https://doi.org/10.1021/acsami.1c08114 2023-04-07T15:59:20Z Massive methane hydrates occur on sediment matrices in nature. Therefore, sediment-based methane hydrate systems play an essential role in the society and hydrate community, including energy resources, global climate changes, and geohazards. However, a fundamental understanding of mechanical properties of methane hydrate–mineral interface systems is largely limited due to insufficient experimental techniques. Herein, by using large-scale molecular simulations, we show that the mechanical properties of methane hydrate–mineral (silica, kaolinite, and Wyoming-type montmorillonite) interface systems are strongly dictated by the chemical components of sedimentary minerals that determine interfacial microstructures between methane hydrates and minerals. The tensile strengths of hydrate–mineral systems are found to decrease following the order of Wyoming-type montmorillonite- > silica- > kaolinite-based methane hydrate systems, all of which show a brittle failure at the interface between methane hydrates and minerals under tension. In contrast, upon compression, methane hydrates decompose into water and methane molecules, resulting from a large strain-induced mechanical instability. In particular, the failure of Wyoming-type montmorillonite-based methane hydrate systems under compression is characterized by a sudden decrease in the compressive stress at a strain of around 0.23, distinguishing it from those of silica- and kaolinite-based methane hydrate systems under compression. Our findings thus provide a molecular insight into the potential mechanisms of mechanical instability of gas hydrate-bearing sediment systems on Earth. Article in Journal/Newspaper Methane hydrate OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) ACS Applied Materials & Interfaces 13 38 46043 46054 |
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English |
description |
Massive methane hydrates occur on sediment matrices in nature. Therefore, sediment-based methane hydrate systems play an essential role in the society and hydrate community, including energy resources, global climate changes, and geohazards. However, a fundamental understanding of mechanical properties of methane hydrate–mineral interface systems is largely limited due to insufficient experimental techniques. Herein, by using large-scale molecular simulations, we show that the mechanical properties of methane hydrate–mineral (silica, kaolinite, and Wyoming-type montmorillonite) interface systems are strongly dictated by the chemical components of sedimentary minerals that determine interfacial microstructures between methane hydrates and minerals. The tensile strengths of hydrate–mineral systems are found to decrease following the order of Wyoming-type montmorillonite- > silica- > kaolinite-based methane hydrate systems, all of which show a brittle failure at the interface between methane hydrates and minerals under tension. In contrast, upon compression, methane hydrates decompose into water and methane molecules, resulting from a large strain-induced mechanical instability. In particular, the failure of Wyoming-type montmorillonite-based methane hydrate systems under compression is characterized by a sudden decrease in the compressive stress at a strain of around 0.23, distinguishing it from those of silica- and kaolinite-based methane hydrate systems under compression. Our findings thus provide a molecular insight into the potential mechanisms of mechanical instability of gas hydrate-bearing sediment systems on Earth. |
format |
Article in Journal/Newspaper |
author |
Cao, Pinqiang Li, Tianshu Ning, Fulong Wu, Jianyang |
spellingShingle |
Cao, Pinqiang Li, Tianshu Ning, Fulong Wu, Jianyang Mechanical Instability of Methane Hydrate–Mineral Interface Systems |
author_facet |
Cao, Pinqiang Li, Tianshu Ning, Fulong Wu, Jianyang |
author_sort |
Cao, Pinqiang |
title |
Mechanical Instability of Methane Hydrate–Mineral Interface Systems |
title_short |
Mechanical Instability of Methane Hydrate–Mineral Interface Systems |
title_full |
Mechanical Instability of Methane Hydrate–Mineral Interface Systems |
title_fullStr |
Mechanical Instability of Methane Hydrate–Mineral Interface Systems |
title_full_unstemmed |
Mechanical Instability of Methane Hydrate–Mineral Interface Systems |
title_sort |
mechanical instability of methane hydrate–mineral interface systems |
publisher |
ACS (American Chemical Society) |
publishDate |
2021 |
url |
https://oceanrep.geomar.de/id/eprint/54219/ https://oceanrep.geomar.de/id/eprint/54219/1/Cao%20et%20al.pdf https://doi.org/10.1021/acsami.1c08114 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_relation |
https://oceanrep.geomar.de/id/eprint/54219/1/Cao%20et%20al.pdf Cao, P., Li, T., Ning, F. and Wu, J. (2021) Mechanical Instability of Methane Hydrate–Mineral Interface Systems. ACS Applied Materials & Interfaces, 13 (38). pp. 46043-46054. DOI 10.1021/acsami.1c08114 <https://doi.org/10.1021/acsami.1c08114>. doi:10.1021/acsami.1c08114 |
op_rights |
info:eu-repo/semantics/restrictedAccess |
op_doi |
https://doi.org/10.1021/acsami.1c08114 |
container_title |
ACS Applied Materials & Interfaces |
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13 |
container_issue |
38 |
container_start_page |
46043 |
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46054 |
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1766067964193275904 |