Dissociation experiment of hydrate core sample using thermodynamic inhibitors

T. Kawamura, Y. Yamamoto, M. Ohtake, Y. Sakamoto, T. Komai, H. Haneda

研究成果: Conference contribution

1 被引用数 (Scopus)

抄録

Natural gas hydrate that exists in the sediment is thought to constitute a large natural gas reservoir and is expected to be an energy resource in the future. In order to make recovery of natural gas from hydrates commercially viable, hydrates must be dissociated in-situ. Inhibitor injection method is thought to be one of the effective dissociation method as well as depressurization and thermal stimulation. In this study, dissociation behavior of an artificial hydrate core sample in inhibitor aqueous solution (methanol aqueous solution) was investigated experimentally. A newly constructed experimental set-up equipped with core holder achieves to investigate the dissociation behavior of hydrate core sample under similar condition under seafloor. Warm inhibitor aqueous solution is injected into the core sample. The heat supplied by the solution dissociates hydrate. Experiment is carried out varying the temperature and concentration of inhibitor. As a result, it becomes clear that inhibitor that changes the hydrate stability condition accelerates the hydrate dissociation rate effectively. Additionally specific feature that temperature of solution from outlet of core changes continuously, while outlet temperature does not change in case of pure water. This result suggests that the inhibitor concentration around hydrate surface should change continuously.

本文言語English
ホスト出版物のタイトルProceedings of the International Offshore and Polar Engineering Conference
ページ346-350
ページ数5
出版ステータスPublished - 2005 12 1
外部発表はい
イベント15th International Offrshore and Polar Engineering Conference, ISOPE-2005 - Seoul, Korea, Republic of
継続期間: 2005 6 192005 6 24

出版物シリーズ

名前Proceedings of the International Offshore and Polar Engineering Conference
2005
ISSN(印刷版)1098-6189
ISSN(電子版)1555-1792

Other

Other15th International Offrshore and Polar Engineering Conference, ISOPE-2005
国/地域Korea, Republic of
CitySeoul
Period05/6/1905/6/24

ASJC Scopus subject areas

  • エネルギー工学および電力技術
  • 海洋工学
  • 機械工学

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