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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Main Authors:	Pinqiang Cao (4520677), Tianshu Li (1527088), Fulong Ning (4520674), Jianyang Wu (1910674)
Format:	Dataset
Language:	unknown
Published:	2021
Subjects:	Molecular Biology Pharmacology Biotechnology Ecology Inorganic Chemistry Computational Biology Physical Sciences not elsewhere classified largely limited due insufficient experimental techniques including energy resources global climate changes findings thus provide determine interfacial microstructures scale molecular simulations methane hydrates decompose induced mechanical instability bearing sediment systems methane hydrates mechanical instability molecular insight methane molecules mechanical properties using large type montmorillonite tensile strengths sudden decrease strongly dictated sediment matrices potential mechanisms interface systems hydrate community gas hydrate fundamental understanding essential role decrease following compressive stress chemical components around 0 Methane hydrate
Online Access:	https://doi.org/10.1021/acsami.1c08114.s004

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record_format	openpolar
spelling	ftsmithonian:oai:figshare.com:article/16617847 2023-05-15T17:11:18+02:00 Mechanical Instability of Methane Hydrate–Mineral Interface Systems Pinqiang Cao (4520677) Tianshu Li (1527088) Fulong Ning (4520674) Jianyang Wu (1910674) 2021-09-14T00:00:00Z https://doi.org/10.1021/acsami.1c08114.s004 unknown https://figshare.com/articles/dataset/Mechanical_Instability_of_Methane_Hydrate_Mineral_Interface_Systems/16617847 doi:10.1021/acsami.1c08114.s004 CC BY-NC 4.0 CC-BY-NC Molecular Biology Pharmacology Biotechnology Ecology Inorganic Chemistry Computational Biology Physical Sciences not elsewhere classified largely limited due insufficient experimental techniques including energy resources global climate changes findings thus provide determine interfacial microstructures scale molecular simulations methane hydrates decompose induced mechanical instability bearing sediment systems methane hydrates mechanical instability molecular insight methane molecules mechanical properties using large type montmorillonite tensile strengths sudden decrease strongly dictated sediment matrices potential mechanisms interface systems hydrate community gas hydrate fundamental understanding essential role decrease following compressive stress chemical components around 0 Dataset 2021 ftsmithonian https://doi.org/10.1021/acsami.1c08114.s004 2021-12-20T02:16:22Z 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. Dataset Methane hydrate Unknown
institution	Open Polar
collection	Unknown
op_collection_id	ftsmithonian
language	unknown
topic	Molecular Biology Pharmacology Biotechnology Ecology Inorganic Chemistry Computational Biology Physical Sciences not elsewhere classified largely limited due insufficient experimental techniques including energy resources global climate changes findings thus provide determine interfacial microstructures scale molecular simulations methane hydrates decompose induced mechanical instability bearing sediment systems methane hydrates mechanical instability molecular insight methane molecules mechanical properties using large type montmorillonite tensile strengths sudden decrease strongly dictated sediment matrices potential mechanisms interface systems hydrate community gas hydrate fundamental understanding essential role decrease following compressive stress chemical components around 0
spellingShingle	Molecular Biology Pharmacology Biotechnology Ecology Inorganic Chemistry Computational Biology Physical Sciences not elsewhere classified largely limited due insufficient experimental techniques including energy resources global climate changes findings thus provide determine interfacial microstructures scale molecular simulations methane hydrates decompose induced mechanical instability bearing sediment systems methane hydrates mechanical instability molecular insight methane molecules mechanical properties using large type montmorillonite tensile strengths sudden decrease strongly dictated sediment matrices potential mechanisms interface systems hydrate community gas hydrate fundamental understanding essential role decrease following compressive stress chemical components around 0 Pinqiang Cao (4520677) Tianshu Li (1527088) Fulong Ning (4520674) Jianyang Wu (1910674) Mechanical Instability of Methane Hydrate–Mineral Interface Systems
topic_facet	Molecular Biology Pharmacology Biotechnology Ecology Inorganic Chemistry Computational Biology Physical Sciences not elsewhere classified largely limited due insufficient experimental techniques including energy resources global climate changes findings thus provide determine interfacial microstructures scale molecular simulations methane hydrates decompose induced mechanical instability bearing sediment systems methane hydrates mechanical instability molecular insight methane molecules mechanical properties using large type montmorillonite tensile strengths sudden decrease strongly dictated sediment matrices potential mechanisms interface systems hydrate community gas hydrate fundamental understanding essential role decrease following compressive stress chemical components around 0
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	Dataset
author	Pinqiang Cao (4520677) Tianshu Li (1527088) Fulong Ning (4520674) Jianyang Wu (1910674)
author_facet	Pinqiang Cao (4520677) Tianshu Li (1527088) Fulong Ning (4520674) Jianyang Wu (1910674)
author_sort	Pinqiang Cao (4520677)
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
publishDate	2021
url	https://doi.org/10.1021/acsami.1c08114.s004
genre	Methane hydrate
genre_facet	Methane hydrate
op_relation	https://figshare.com/articles/dataset/Mechanical_Instability_of_Methane_Hydrate_Mineral_Interface_Systems/16617847 doi:10.1021/acsami.1c08114.s004
op_rights	CC BY-NC 4.0
op_rightsnorm	CC-BY-NC
op_doi	https://doi.org/10.1021/acsami.1c08114.s004
_version_	1766068111420686336

Mechanical Instability of Methane Hydrate–Mineral Interface Systems

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