| Title |
A Comparative Experiment on the Hydrate Structures Ⅰ and Ⅱ for the Solid Transportation of Natural Gas |
| Keywords |
Natural gas hydrate ; 천연가스 하이드레이트 ; Subcooling ; 과냉도 ; Nucleation ; 핵생성 ; Induction time ; 유도시간 ; Cavity ; 공동 |
| Abstract |
Natural gas hydrate typically contains 85wt.% water and 15wt.% natural gas, and commonly belongs to cubic structureⅠandⅡ. Also, 1m3 hydrate of natural gas can be decomposed to 200m3 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 structureⅡis approximately 65% lower and the solubility is about 3 times higher than structureⅠ. Also if the subcoolings of structureⅠand structureⅡare more than 9K and 11K respectively, the hydrates are rapidly formed. |