| 학회 |
한국화학공학회 |
| 학술대회 |
2006년 가을 (10/27 ~ 10/28, 고려대학교) |
| 권호 |
12권 2호, p.2259 |
| 발표분야 |
열역학 |
| 제목 |
Sequestering Carbon Dioxide into Complex Structures of Naturally Occurring Gas Hydrates |
| 초록 |
Large amounts of CH4 in the form of solid hydrates are stored on continental margins and in permafrost regions. We explore here the swapping phenomenon occurring in sI and sII CH4 hydrate deposits through spectroscopic analyses and its potential application to CO2 sequestration at the preliminary phase. The present outcome of 85% CH4 recovery rate in sI CH4 hydrate achieved by the direct use of binary N2 + CO2 guests is quite surprising when compared with the rate of 64 % for a pure CO2 guest attained in the previous approach. In addition, the simultaneously-occurring dual mechanism of CO2 sequestration and CH4 recovery is expected to provide the physicochemical background required for developing a promising large-scale approach with economic feasibility. In the case of sII CH4 hydrates, we observe a spontaneous structure transition of sII to sI during the replacement and a cage-specific distribution of guest molecules. A significant change of the lattice dimension due to structure transformation induces a relative number of small cage sites to reduce, resulting in the considerable increase of CH4 recovery rate. |
| 저자 |
박영준1, 김도연1, 이종원2, 허대기3, 박근필3, 이재형3, 이 흔1
|
| 소속 |
1한국과학기술원, 2공주대, 3한국지질자원(연) |
| 키워드 |
clathrate; CO2 sequestration; methane; swapping phenomenon; NMR
|
| E-Mail |
|
| VOD |
VOD 보기 |
| 원문파일 |
초록 보기 |
