Korean Journal of Air-Conditioning and Refrigeration Engineering (설비공학논문집)

The Society of Air-Conditioning and Refrigerating Engineers of Korea (대한설비공학회)
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A Comparative Study on the Effect of THF and Oxidized Carbon Nanotubes for Methane Hydrate Formation

메탄 하이드레이트 생성을 위한 THF와 산화 탄소나노튜브의 영향에 대한 비교 연구

  • Park, Sung-Seek (Department of Nuclear and Energy Engineering, Jeju National University) ;
  • An, Eoung-Jin (Department of Nuclear and Energy Engineering, Jeju National University) ;
  • Kim, Nam-Jin (Department of Nuclear and Energy Engineering, Jeju National University)
  • 박성식 (제주대학교 에너지공학과) ;
  • 안응진 (제주대학교 에너지공학과) ;
  • 김남진 (제주대학교 에너지공학과)
  • Received : 2011.07.18
  • Published : 2011.12.10
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Abstract

Methane hydrate is formed by physical binding between water molecules and methane gas, which is captured in the cavities of water molecules under the specific temperature and pressure. $1m^3$ hydrate of pure methane can be decomposed to the methane gas of $172m^3$ and water of $0.8m^3$ at standard condition. Therefore, there are a lot of practical applications such as separation processes, natural gas storage transportation and carbon dioxide sequestration. For the industrial utilization of hydrate, it is very important to rapidly manufacture hydrate. So in this study, hydrate formation was experimented by adding THF and oxidized carbon nanotubes in distilled water, respectively. The results show that when the oxidized carbon nanofluids of 0.03 wt% was, the amount of gas consumed during the formation of methane hydrate was higher than that in the THF aqueous solution. Also, the oxidized carbon nanofluids decreased the hydrate formation time to a greater extent than the THF aqueous solution at the same subcooling temperature.

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