Supersaturation dependent nucleation of methane + propane mixed-gas hydrate
Before hydrates can be widely used in industry, we should better understand the problematic issues of hydrate nucleation, particularly its stochastic nature. Here, we report on measurements of the nucleation probability of mixed-gas hydrates in which the guest molecules are a mixture of methane and...
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craippubl:10.1063/5.0189967 2024-04-07T07:54:03+00:00 Supersaturation dependent nucleation of methane + propane mixed-gas hydrate Uchida, Tsutomu Sugibuchi, Ren Hayama, Masato Yamazaki, Kenji Hokkaido Gas Co. Ltd. Arai Foundation 2024 http://dx.doi.org/10.1063/5.0189967 https://pubs.aip.org/aip/jcp/article-pdf/doi/10.1063/5.0189967/19687820/074502_1_5.0189967.pdf en eng AIP Publishing The Journal of Chemical Physics volume 160, issue 7 ISSN 0021-9606 1089-7690 Physical and Theoretical Chemistry General Physics and Astronomy journal-article 2024 craippubl https://doi.org/10.1063/5.0189967 2024-03-08T00:06:17Z Before hydrates can be widely used in industry, we should better understand the problematic issues of hydrate nucleation, particularly its stochastic nature. Here, we report on measurements of the nucleation probability of mixed-gas hydrates in which the guest molecules are a mixture of methane and propane. For the pure cases, at a supersaturation near 1.0, we had previously measured an induction time for the methane hydrate of about 1 h, whereas for the propane hydrate, it was over one day. Using the same experimental setup, we examine here the nucleation probability for a mixture of 90% methane and 10% propane as the guest gas for a range of supersaturations. For the experiments, the temperature was 274 ± 0.5 K and the stirring rate was about 300 rpm. The experiments were repeated at least ten times under the same condition, exchanging the sample water every time. We define the nucleation probability at a given time as the fraction of trials that nucleated by that time and then determine the nucleation probability distribution. The resulting nucleation frequency is found to have a power-law relation to supersaturation. Then, we examine how the nucleation frequency is affected by the existence of ultrafine bubbles in the initial water. We find that the ultrafine bubbles increase the nucleation frequency but much less than that of typical changes in supersaturation. Article in Journal/Newspaper Methane hydrate AIP Publishing The Journal of Chemical Physics 160 7 |
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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 Uchida, Tsutomu Sugibuchi, Ren Hayama, Masato Yamazaki, Kenji Supersaturation dependent nucleation of methane + propane mixed-gas hydrate |
topic_facet |
Physical and Theoretical Chemistry General Physics and Astronomy |
description |
Before hydrates can be widely used in industry, we should better understand the problematic issues of hydrate nucleation, particularly its stochastic nature. Here, we report on measurements of the nucleation probability of mixed-gas hydrates in which the guest molecules are a mixture of methane and propane. For the pure cases, at a supersaturation near 1.0, we had previously measured an induction time for the methane hydrate of about 1 h, whereas for the propane hydrate, it was over one day. Using the same experimental setup, we examine here the nucleation probability for a mixture of 90% methane and 10% propane as the guest gas for a range of supersaturations. For the experiments, the temperature was 274 ± 0.5 K and the stirring rate was about 300 rpm. The experiments were repeated at least ten times under the same condition, exchanging the sample water every time. We define the nucleation probability at a given time as the fraction of trials that nucleated by that time and then determine the nucleation probability distribution. The resulting nucleation frequency is found to have a power-law relation to supersaturation. Then, we examine how the nucleation frequency is affected by the existence of ultrafine bubbles in the initial water. We find that the ultrafine bubbles increase the nucleation frequency but much less than that of typical changes in supersaturation. |
author2 |
Hokkaido Gas Co. Ltd. Arai Foundation |
format |
Article in Journal/Newspaper |
author |
Uchida, Tsutomu Sugibuchi, Ren Hayama, Masato Yamazaki, Kenji |
author_facet |
Uchida, Tsutomu Sugibuchi, Ren Hayama, Masato Yamazaki, Kenji |
author_sort |
Uchida, Tsutomu |
title |
Supersaturation dependent nucleation of methane + propane mixed-gas hydrate |
title_short |
Supersaturation dependent nucleation of methane + propane mixed-gas hydrate |
title_full |
Supersaturation dependent nucleation of methane + propane mixed-gas hydrate |
title_fullStr |
Supersaturation dependent nucleation of methane + propane mixed-gas hydrate |
title_full_unstemmed |
Supersaturation dependent nucleation of methane + propane mixed-gas hydrate |
title_sort |
supersaturation dependent nucleation of methane + propane mixed-gas hydrate |
publisher |
AIP Publishing |
publishDate |
2024 |
url |
http://dx.doi.org/10.1063/5.0189967 https://pubs.aip.org/aip/jcp/article-pdf/doi/10.1063/5.0189967/19687820/074502_1_5.0189967.pdf |
genre |
Methane hydrate |
genre_facet |
Methane hydrate |
op_source |
The Journal of Chemical Physics volume 160, issue 7 ISSN 0021-9606 1089-7690 |
op_doi |
https://doi.org/10.1063/5.0189967 |
container_title |
The Journal of Chemical Physics |
container_volume |
160 |
container_issue |
7 |
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1795670317086015488 |