| 학회 |
한국화학공학회 |
| 학술대회 |
2021년 가을 (10/27 ~ 10/29, 광주 김대중컨벤션센터) |
| 권호 |
27권 2호, p.1912 |
| 발표분야 |
열역학 분자모사 |
| 제목 |
Thermodynamic and kinetic formation behaviors of CO2 + N2 hydrates in saline water and their significance for CO2 separation and sequestration |
| 초록 |
Geological sequestration of CO2 is considered as a promising carbon storage option. When flue gas is injected into natural gas hydrate layer, both CO2 sequestration and natural gas production can be achieved simultaneously through guest replacement. During the flue gas injection, mixed gas hydrates can be additionally formed with residual water in marine sediments. In this study, thermodynamic and kinetic formation behaviors of CO2 + N2 hydrates in NaCl solution were investigated to see the effect of NaCl on the CO2 + N2 hydrate formation. In NaCl solution, hydrate equilibrium conditions were shifted to harsher regions. In NaCl 3.5wt% solution, the hydrate conversion was decreased, but the CO2 selectivity in the hydrate phase was increased. The time-dependent formation behavior of CO2 + N2 hydrates was observed via in-situ Raman spectroscopy. The high CO2 selectivity in the hydrate phase was confirmed at the early stage of the hydrate growth in pure water, and this tendency was more pronounced in NaCl solution. The results provide valuable insights into the formation behavior of CO2 + N2 hydrates in real marine sediment conditions. |
| 저자 |
목정훈1, 김성우2, 최원중2, 이종혁2, 서용원2
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| 소속 |
1UNIST, 2unist |
| 키워드 |
열역학; 상평형
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| E-Mail |
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| 원문파일 |
초록 보기 |
