Journal of the Korea Organic Resources Recycling Association (유기물자원화)

Korea Organic Resources Recycling Association (유기성자원학회)
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A Study on Gas Hydrate Replacement Method for Organic Methane Recovery in Ocean Sediment

해저 퇴적토 내 유기성 메탄 회수를 위한 가스하이드레이트 치환기법 연구

  • Shin, Dong Hyung (Department of Energy and Environmental Engineering, Seoul National University of Science and Technology) ;
  • Park, Dae Won (Department of Energy and Environmental Engineering, Seoul National University of Science and Technology)
  • 신동현 (서울과학기술대학교 에너지환경공학과) ;
  • 박대원 (서울과학기술대학교 에너지환경공학과)
  • Received : 2018.10.08
  • Accepted : 2018.10.28
  • Published : 2018.12.30
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Abstract

In this study, the effect of physico-chemical factors (e.g., pressure, electrolyte, and organic matter) in the gas hydrate deposit on CH4-CO2 replacement process was investigated experimentally. The higher initial pressure during gas injection led the higher reaction rate at the first time, but finally it did not. Electrolytes and organic matter have some effects on reforming process after dissociation of gas hydrate. It is expected that further research using real marine sediments with actual gas hydrate will enable the development of technologies applicable to the characteristics of domestic seabed geology. Ultimately, it is expected that it will be possible to recover and utilize methane as an organic resource through application of domestic gas hydrate deposit in the Ulleung Basin, East Sea.

본 연구에서는 압력, 전해질, 유기물 등 가스하이드레이트 부존 지역의 물리화학적 인자가 치환반응에 미치는 영향을 실험적으로 규명하였다. 가스 주입 시 초기 압력이 높을수록 초반 반응속도는 향상되었으나 시간이 지남에 따라 치환효율이 일정한 값으로 수렴하였다. 전해질과 유기물 등의 경우 가스하이드레이트 해리 후 재생성 과정에서 일부 영향을 미치는 것으로 밝혀졌다. 향후 실제 유기성 메탄 하이드레이트가 부존된 퇴적토를 활용한 추가 연구를 통해 국내 해저 지질특성에 적용 가능한 기술 개발이 가능할 것으로 기대된다. 궁극적으로 향후 동해 울릉 분지의 가스하이드레이트 매장 지역 현장 적용을 통해서 유기성 자원인 메탄을 회수하고 활용할 수 있을 것으로 예상된다.

Keywords

References

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