Multi-phase retrieval of methane hydrate in natural sediments by cryogenic x-ray computed tomography
In this study, we observed natural methane (CH4) hydrate sediments, which are a type of unconventional natural gas resources, using x-ray computed tomography (CT). Because CH4 hydrates are formed by hydrogen bonding of water molecules with CH4, material decomposition becomes challenging when CH4 hyd...
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Online Access: | http://dx.doi.org/10.1063/5.0189025 https://pubs.aip.org/aip/jcp/article-pdf/doi/10.1063/5.0189025/18297203/024201_1_5.0189025.pdf |
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craippubl:10.1063/5.0189025 2024-05-12T08:07:00+00:00 Multi-phase retrieval of methane hydrate in natural sediments by cryogenic x-ray computed tomography Takeya, Satoshi Hachikubo, Akihiro Sakagami, Hirotoshi Minami, Hirotsugu Yamashita, Satoshi Hirano, Keiichi Hyodo, Kazuyuki Yoneyama, Akio Japan Society for the Promotion of Science London 2024 http://dx.doi.org/10.1063/5.0189025 https://pubs.aip.org/aip/jcp/article-pdf/doi/10.1063/5.0189025/18297203/024201_1_5.0189025.pdf en eng AIP Publishing The Journal of Chemical Physics volume 160, issue 2 ISSN 0021-9606 1089-7690 Physical and Theoretical Chemistry General Physics and Astronomy journal-article 2024 craippubl https://doi.org/10.1063/5.0189025 2024-04-18T06:44:56Z In this study, we observed natural methane (CH4) hydrate sediments, which are a type of unconventional natural gas resources, using x-ray computed tomography (CT). Because CH4 hydrates are formed by hydrogen bonding of water molecules with CH4, material decomposition becomes challenging when CH4 hydrates coexist with liquid or solid water in natural sediments. Tri-contrast (absorption, refraction, and scattering) imaging was performed via diffraction enhanced x-ray CT optics using monochromatic synchrotron x rays. The quantitative characterization of the contrast changes successfully enabled the decomposition of CH4 hydrates coexisting with frozen seawater (ice) in natural sediments obtained from the Okhotsk Sea. This study reveals complementary structural information about the microtexture and spatial relation among CH4 hydrates, ice, and pores by utilizing the distinct physical properties of x rays when passing through the materials. These results highlight the exceptional capabilities of high-resolution multicontrast x-ray tomography in materials science and geoscience applications. Article in Journal/Newspaper Methane hydrate okhotsk sea AIP Publishing Okhotsk The Journal of Chemical Physics 160 2 |
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English |
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Physical and Theoretical Chemistry General Physics and Astronomy |
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Physical and Theoretical Chemistry General Physics and Astronomy Takeya, Satoshi Hachikubo, Akihiro Sakagami, Hirotoshi Minami, Hirotsugu Yamashita, Satoshi Hirano, Keiichi Hyodo, Kazuyuki Yoneyama, Akio Multi-phase retrieval of methane hydrate in natural sediments by cryogenic x-ray computed tomography |
topic_facet |
Physical and Theoretical Chemistry General Physics and Astronomy |
description |
In this study, we observed natural methane (CH4) hydrate sediments, which are a type of unconventional natural gas resources, using x-ray computed tomography (CT). Because CH4 hydrates are formed by hydrogen bonding of water molecules with CH4, material decomposition becomes challenging when CH4 hydrates coexist with liquid or solid water in natural sediments. Tri-contrast (absorption, refraction, and scattering) imaging was performed via diffraction enhanced x-ray CT optics using monochromatic synchrotron x rays. The quantitative characterization of the contrast changes successfully enabled the decomposition of CH4 hydrates coexisting with frozen seawater (ice) in natural sediments obtained from the Okhotsk Sea. This study reveals complementary structural information about the microtexture and spatial relation among CH4 hydrates, ice, and pores by utilizing the distinct physical properties of x rays when passing through the materials. These results highlight the exceptional capabilities of high-resolution multicontrast x-ray tomography in materials science and geoscience applications. |
author2 |
Japan Society for the Promotion of Science London |
format |
Article in Journal/Newspaper |
author |
Takeya, Satoshi Hachikubo, Akihiro Sakagami, Hirotoshi Minami, Hirotsugu Yamashita, Satoshi Hirano, Keiichi Hyodo, Kazuyuki Yoneyama, Akio |
author_facet |
Takeya, Satoshi Hachikubo, Akihiro Sakagami, Hirotoshi Minami, Hirotsugu Yamashita, Satoshi Hirano, Keiichi Hyodo, Kazuyuki Yoneyama, Akio |
author_sort |
Takeya, Satoshi |
title |
Multi-phase retrieval of methane hydrate in natural sediments by cryogenic x-ray computed tomography |
title_short |
Multi-phase retrieval of methane hydrate in natural sediments by cryogenic x-ray computed tomography |
title_full |
Multi-phase retrieval of methane hydrate in natural sediments by cryogenic x-ray computed tomography |
title_fullStr |
Multi-phase retrieval of methane hydrate in natural sediments by cryogenic x-ray computed tomography |
title_full_unstemmed |
Multi-phase retrieval of methane hydrate in natural sediments by cryogenic x-ray computed tomography |
title_sort |
multi-phase retrieval of methane hydrate in natural sediments by cryogenic x-ray computed tomography |
publisher |
AIP Publishing |
publishDate |
2024 |
url |
http://dx.doi.org/10.1063/5.0189025 https://pubs.aip.org/aip/jcp/article-pdf/doi/10.1063/5.0189025/18297203/024201_1_5.0189025.pdf |
geographic |
Okhotsk |
geographic_facet |
Okhotsk |
genre |
Methane hydrate okhotsk sea |
genre_facet |
Methane hydrate okhotsk sea |
op_source |
The Journal of Chemical Physics volume 160, issue 2 ISSN 0021-9606 1089-7690 |
op_doi |
https://doi.org/10.1063/5.0189025 |
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The Journal of Chemical Physics |
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160 |
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2 |
_version_ |
1798849573640208384 |