A Comparative Experiment on the Hydrate Structures I and II for the Solid Transportation of Natural Gas

천연가스 고체화수송을 위한 하이드레이트 구조 I과 II에 대한 비교실험

  • 김남진 (인하대학교 기계공학과) ;
  • 김종보 (인하대학교 기계공학과)
  • Published : 2003.08.01

Abstract

Natural gas hydrate typically contains 85 wt.% water and 15 wt.% natural gas, and commonly belongs to cubic structure I and II. Also, 1m$^3$ hydrate of natural gas can be decomposed to 200 m$^3$ natural gas at standard condition. If this characteristic of hydrate is reversely utilized, natural gas is fixed into water and produced to hydrate. Therefore the hydrate is great as a means to transport and store natural gas. So, the tests were performed on the formation of natural gas hydrate is governed by the pressure, temperature, gas composition etc. The results show that the equilibrium pressure of structure II is approximately 65% lower and the solubility is about 3 times higher than structure I. Also if the subcoolings of structure I and structure II are more than 9 K and 11 K respectively, the hydrates are rapidly formed.

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