Journal of the Korean Solar Energy Society (한국태양에너지학회 논문집)

The Korean Solar Energy Society (한국태양에너지학회)
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Study on Methane Hydrate Formation in Seawater and Pure Water

해수와 순수물에서 메탄 하이드레이트 생성에 대한 연구

  • Park, Sung-Seek (Dept. of Nuclear & Energy Engineering, Cheju National University) ;
  • Kim, Nam-Jin (Dept. of Nuclear & Energy Engineering, Cheju National University)
  • 박성식 (제주대학교 대학원 에너지공학과) ;
  • 김남진 (제주대학교 에너지공학과)
  • Published : 2009.08.30
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Abstract

$1m^3$ hydrate of pure methane can be decomposed to the maximum of $216m^3$ methane at standard condition. If these characteristics of hydrate are reversely utilized, natural gas is fixed into water in the form of hydrate solid. Therefore, the hydrate is considered to be a great way to transport and store natural gas in large quantity. Especially the transportation cost is known to be 18-24% less than the liquefied transportation. In the present investigation, experiments and theoretical calculation carried out for the formation of methane hydrate in NaCl 3.5wt% solution. The results show that the equilibrium pressure in seawater is more higher than that in pure water, and methane hydrate could be formed rapidly during pressurization if the subcooling is maintained at 9K or above in seawater and 8K or above in pure water, respectively. Also, amount of consumed gas volume in pure water is more higher that in seawater at the same experimental conditions. Therefore, it is found that NaCl acts as a inhibitor.

Keywords

References

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