| 학회 |
한국화학공학회 |
| 학술대회 |
2010년 가을 (10/21 ~ 10/22, 대전컨벤션센터) |
| 권호 |
16권 2호, p.1661 |
| 발표분야 |
에너지 |
| 제목 |
Nitrogen and Carbon Dioxide Hydrate Phase Behavior in Small Porous Silica Gels: Three-Phase Equilibrium and Thermodynamic Modeling |
| 초록 |
In the present study, we examined methane hydrate in porous silica gels to see the effect of natural sandstones in deep sea environments. For developing the CH4-CO2 swapping method, we first need many different types of phase equilibrium data including three major guests of CH4, CO2, and N2. Here, we adopted the saturated water in silica gel pores in order to substantially enhance active surface area for contacting and encaging gas molecules. We measured the three-phase hydrate (H)water-rich liquid (LW)vapor (V) equilibria of CO2+N2 gas hydrates in 6.0, 15.0 and 30.0nm silica gel pores to investigate the effect of geometrical constraints on the phase equilibrium patterns. The hydrate stability region is shifted to a high pressure region as the pore size of silica gel decreases. We also confirmed that the calculated values of phase equilibria showed good agreement with experimental data. The overall experimental results are essential for both exploitation of the natural gas hydrate in marine sediments and sequestration process of carbon dioxide into the deep ocean. |
| 저자 |
강혜리1, 고동연1, 김대옥1, 이재형2, 이 흔1
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| 소속 |
1한국과학기술원, 2한국지질자원(연) |
| 키워드 |
hydrate phase equilibria; silica gels
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| E-Mail |
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| 원문파일 |
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