Abstract
Basic studies are conducted for the collection of methane from the methane hydrate that exists at levels deeper than 500m in the sea. The relationship between the hydrate generation mechanism and water cluster structure is examined by use of mass spectronomy. It is found that, among the stable liquid phase clusters, the (H2O)21H{sup +} cluster is the most stable. Stable hydrate clusters are in presence in quantities, and participate in the formation of hydrate crystal nuclei. For the elucidation of the nucleus formation mechanism, a kinetic simulation is conducted of molecules in the cohesion system consisting of water and methane molecules. Water molecules that array near methane molecules at the normal pressure is disarrayed under a higher pressure for rearray into a hydrate structure. Hydrate formation and breakdown in the three-phase equilibrium state of H2O, CH4, and CO2 at a low temperature and high pressure are tested, which discloses that supercooling is required for formation, that it is possible to extract CH4 first for replacement by guest molecule CO2 since CO2 is stabler than CH4 at a lower pressure or higher temperature, and that formation is easier to take place when the grain diameter is larger at the formation point
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Kuriyagawa, M;
Saito, T;
Kobayashi, H;
Karasawa, H;
Kiyono, F;
Nagaoki, R;
Yamamoto, Y;
Komai, T;
Haneda, H;
Takahashi, Y;
[1]
Nada, H
[2]
- National Institute for Resources and Environment, Tsukuba (Japan)
- Science and Technology Agency, Tokyo (Japan)
Citation Formats
Kuriyagawa, M, Saito, T, Kobayashi, H, Karasawa, H, Kiyono, F, Nagaoki, R, Yamamoto, Y, Komai, T, Haneda, H, Takahashi, Y, and Nada, H.
Study on molecular controlled mining system of methane hydrate; Methane hydrate no bunshi seigyo mining ni kansuru kenkyu.
Japan: N. p.,
1997.
Web.
Kuriyagawa, M, Saito, T, Kobayashi, H, Karasawa, H, Kiyono, F, Nagaoki, R, Yamamoto, Y, Komai, T, Haneda, H, Takahashi, Y, & Nada, H.
Study on molecular controlled mining system of methane hydrate; Methane hydrate no bunshi seigyo mining ni kansuru kenkyu.
Japan.
Kuriyagawa, M, Saito, T, Kobayashi, H, Karasawa, H, Kiyono, F, Nagaoki, R, Yamamoto, Y, Komai, T, Haneda, H, Takahashi, Y, and Nada, H.
1997.
"Study on molecular controlled mining system of methane hydrate; Methane hydrate no bunshi seigyo mining ni kansuru kenkyu."
Japan.
@misc{etde_506686,
title = {Study on molecular controlled mining system of methane hydrate; Methane hydrate no bunshi seigyo mining ni kansuru kenkyu}
author = {Kuriyagawa, M, Saito, T, Kobayashi, H, Karasawa, H, Kiyono, F, Nagaoki, R, Yamamoto, Y, Komai, T, Haneda, H, Takahashi, Y, and Nada, H}
abstractNote = {Basic studies are conducted for the collection of methane from the methane hydrate that exists at levels deeper than 500m in the sea. The relationship between the hydrate generation mechanism and water cluster structure is examined by use of mass spectronomy. It is found that, among the stable liquid phase clusters, the (H2O)21H{sup +} cluster is the most stable. Stable hydrate clusters are in presence in quantities, and participate in the formation of hydrate crystal nuclei. For the elucidation of the nucleus formation mechanism, a kinetic simulation is conducted of molecules in the cohesion system consisting of water and methane molecules. Water molecules that array near methane molecules at the normal pressure is disarrayed under a higher pressure for rearray into a hydrate structure. Hydrate formation and breakdown in the three-phase equilibrium state of H2O, CH4, and CO2 at a low temperature and high pressure are tested, which discloses that supercooling is required for formation, that it is possible to extract CH4 first for replacement by guest molecule CO2 since CO2 is stabler than CH4 at a lower pressure or higher temperature, and that formation is easier to take place when the grain diameter is larger at the formation point since larger grain diameters result in a higher formation temperature. 3 figs.}
place = {Japan}
year = {1997}
month = {Feb}
}
title = {Study on molecular controlled mining system of methane hydrate; Methane hydrate no bunshi seigyo mining ni kansuru kenkyu}
author = {Kuriyagawa, M, Saito, T, Kobayashi, H, Karasawa, H, Kiyono, F, Nagaoki, R, Yamamoto, Y, Komai, T, Haneda, H, Takahashi, Y, and Nada, H}
abstractNote = {Basic studies are conducted for the collection of methane from the methane hydrate that exists at levels deeper than 500m in the sea. The relationship between the hydrate generation mechanism and water cluster structure is examined by use of mass spectronomy. It is found that, among the stable liquid phase clusters, the (H2O)21H{sup +} cluster is the most stable. Stable hydrate clusters are in presence in quantities, and participate in the formation of hydrate crystal nuclei. For the elucidation of the nucleus formation mechanism, a kinetic simulation is conducted of molecules in the cohesion system consisting of water and methane molecules. Water molecules that array near methane molecules at the normal pressure is disarrayed under a higher pressure for rearray into a hydrate structure. Hydrate formation and breakdown in the three-phase equilibrium state of H2O, CH4, and CO2 at a low temperature and high pressure are tested, which discloses that supercooling is required for formation, that it is possible to extract CH4 first for replacement by guest molecule CO2 since CO2 is stabler than CH4 at a lower pressure or higher temperature, and that formation is easier to take place when the grain diameter is larger at the formation point since larger grain diameters result in a higher formation temperature. 3 figs.}
place = {Japan}
year = {1997}
month = {Feb}
}