| Project/Area Number |
14550864
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
船舶工学
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| Research Institution | Sojo Univ. |
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Principal Investigator |
KOBAYASHI Yoshihiro Sojo Univ., Eng. Dept., Professor, 工学部, 教授 (00234857)
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| Project Period (FY) |
2002 – 2003
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| Project Status |
Completed (Fiscal Year 2003)
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| Budget Amount *help |
¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 2003: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 2002: ¥1,200,000 (Direct Cost: ¥1,200,000)
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| Keywords | Methane gas hydrate / Hydrate / Formation-Dissociation / Storage / self preservation effect / 安定性 / メタンガスハイドレイド |
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| Research Abstract |
Experimental researches of the methane hydrate behavior and the confirmation of phenomena have been carried out. Those include the following items.
(1)Inherent formation of methane hydrate in the pebbles or sands under the simulated conditions of pressure and temperature of sea bottom and the accelerated formations of hydrate were observed.
(2)Horizontal contact of the water and the methane gas was given in the pressure vessel under the pressure and a certain level of sub-cooled temperature. Natural formation of hydrate at the interface of the both material was observed.
(3)Forced convection and stirring were given to the two materials. After several hours lots of white nuclei made appearance in the water and moved upward then seemed solidified into hydrate there. During the formation the heat production was observed inside the hydrate core by temperature change. The heat absorption is essentially necessary.
(4)Two methods of the heating and the decompression were applied for dissociation of the hydrate. Different behaviors occurred. The rapid decompression will lead to the freezing of water.
(5)The self preservation effect of the hydrate was reproduced by our small apparatus. After freezing up-to about -10 deg. C and maintaining under the atmosphere pressure, dissociation could not be observed. Burning of gas proved the SPE.
(6)The sophisticated system of the formation, SPE, storage and dissociation of the hydrate was thought up based on this research, target was energy and material saving, efficient performance, the stabilized storage and controllable operation.
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