In situ Raman Spectroscopic Study of the Dissociation of Methane Hydrate at High Pressure
The dissociation of methane hydrate at high pressure is studied by in situ Raman spectroscopy in a diamond-anvil cell. As for the Raman spectrum of sI methane hydrate, the v 1 band of CH 4 is split into two peaks v′ 1 and v′ 1 , indicating the partitioning of CH 4 between the large (5 12 6 2 ) and s...
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Online Access: | http://dx.doi.org/10.1366/000370206778397281 http://journals.sagepub.com/doi/pdf/10.1366/000370206778397281 |
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crsagepubl:10.1366/000370206778397281 2024-04-28T08:28:19+00:00 In situ Raman Spectroscopic Study of the Dissociation of Methane Hydrate at High Pressure Sun, Q. Zheng, H. F. 2006 http://dx.doi.org/10.1366/000370206778397281 http://journals.sagepub.com/doi/pdf/10.1366/000370206778397281 en eng SAGE Publications http://journals.sagepub.com/page/policies/text-and-data-mining-license Applied Spectroscopy volume 60, issue 9, page 985-988 ISSN 0003-7028 1943-3530 Spectroscopy Instrumentation journal-article 2006 crsagepubl https://doi.org/10.1366/000370206778397281 2024-04-09T08:02:16Z The dissociation of methane hydrate at high pressure is studied by in situ Raman spectroscopy in a diamond-anvil cell. As for the Raman spectrum of sI methane hydrate, the v 1 band of CH 4 is split into two peaks v′ 1 and v′ 1 , indicating the partitioning of CH 4 between the large (5 12 6 2 ) and small (5 12 ) cavities, respectively. With increasing temperature, the intensity ratio of Iv′ 1 / Iv′ 1 decreases obviously, and the d( Iv′ 1 / Iv′ 1 )/d T is −0.079 K −1 . Additionally, the v 1 band of the dissolved CH 4 is close to v′ 1 of the CH 4 molecule engaged in the small 5 12 cavity. This implies that, in the initial stage of hydrate formation, the abundance of small 5 12 cavities is greater than that of large 5 12 6 2 cavities. Article in Journal/Newspaper Methane hydrate SAGE Publications Applied Spectroscopy 60 9 985 988 |
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SAGE Publications |
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English |
topic |
Spectroscopy Instrumentation |
spellingShingle |
Spectroscopy Instrumentation Sun, Q. Zheng, H. F. In situ Raman Spectroscopic Study of the Dissociation of Methane Hydrate at High Pressure |
topic_facet |
Spectroscopy Instrumentation |
description |
The dissociation of methane hydrate at high pressure is studied by in situ Raman spectroscopy in a diamond-anvil cell. As for the Raman spectrum of sI methane hydrate, the v 1 band of CH 4 is split into two peaks v′ 1 and v′ 1 , indicating the partitioning of CH 4 between the large (5 12 6 2 ) and small (5 12 ) cavities, respectively. With increasing temperature, the intensity ratio of Iv′ 1 / Iv′ 1 decreases obviously, and the d( Iv′ 1 / Iv′ 1 )/d T is −0.079 K −1 . Additionally, the v 1 band of the dissolved CH 4 is close to v′ 1 of the CH 4 molecule engaged in the small 5 12 cavity. This implies that, in the initial stage of hydrate formation, the abundance of small 5 12 cavities is greater than that of large 5 12 6 2 cavities. |
format |
Article in Journal/Newspaper |
author |
Sun, Q. Zheng, H. F. |
author_facet |
Sun, Q. Zheng, H. F. |
author_sort |
Sun, Q. |
title |
In situ Raman Spectroscopic Study of the Dissociation of Methane Hydrate at High Pressure |
title_short |
In situ Raman Spectroscopic Study of the Dissociation of Methane Hydrate at High Pressure |
title_full |
In situ Raman Spectroscopic Study of the Dissociation of Methane Hydrate at High Pressure |
title_fullStr |
In situ Raman Spectroscopic Study of the Dissociation of Methane Hydrate at High Pressure |
title_full_unstemmed |
In situ Raman Spectroscopic Study of the Dissociation of Methane Hydrate at High Pressure |
title_sort |
in situ raman spectroscopic study of the dissociation of methane hydrate at high pressure |
publisher |
SAGE Publications |
publishDate |
2006 |
url |
http://dx.doi.org/10.1366/000370206778397281 http://journals.sagepub.com/doi/pdf/10.1366/000370206778397281 |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_source |
Applied Spectroscopy volume 60, issue 9, page 985-988 ISSN 0003-7028 1943-3530 |
op_rights |
http://journals.sagepub.com/page/policies/text-and-data-mining-license |
op_doi |
https://doi.org/10.1366/000370206778397281 |
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Applied Spectroscopy |
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60 |
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9 |
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985 |
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988 |
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1797586888586952704 |