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DC Field | Value | Language |
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dc.citation.endPage | 371 | - |
dc.citation.number | 3 | - |
dc.citation.startPage | 367 | - |
dc.citation.title | KOREAN CHEMICAL ENGINEERING RESEARCH(HWAHAK KONGHAK) | - |
dc.citation.volume | 49 | - |
dc.contributor.author | Seo, Yongwon | - |
dc.contributor.author | Lee, Seungmin | - |
dc.contributor.author | Park, Sungmin | - |
dc.contributor.author | Lee, Youngjun | - |
dc.contributor.author | Lee, Sungwon | - |
dc.date.accessioned | 2023-12-22T06:15:24Z | - |
dc.date.available | 2023-12-22T06:15:24Z | - |
dc.date.created | 2015-01-06 | - |
dc.date.issued | 2011-03 | - |
dc.description.abstract | TBAB (tetra-n-butyl ammonium bromide) forms a semi-clathrate with water under atmospheric pressure conditions and recently has attracted great attention due to its usage as a thermodynamic promoter in gas storage and separation process using gas hydrate formation. In this study, we measured the three-phase (hydrate (H)-liquid water (Lw)-vapor (V)) equilibria of the ternary CH4+TBAB+water and CO2+TBAB+water mixtures at the TBAB concentrations of 5 and 32wt% to investigate promoting characteristics of TBAB. The greater promotion effect of TBAB was observed at 32 wt% than at 5 wt%. This result was in good agreement with that from pure TBAB semi-clathrate phase diagram under atmospheric pressure conditions. Through 13C NMR analysis of the CH4+TBAB semi-clathrate, it was found that CH4 molecules are enclathrated in the cages of the double semi-clathrate and the position of resonance peak from encaged CH4 molocules in the double semi-clathrate is the same as that from encaged CH4 molocules in the pure CH4 hydrate of structure I. TBAB(tetra-n-butyl ammonium bromide)는 상온/상압 조건에서 semi-clathrate를 형성하는 물질로서 최근 가스 하이드레이트 형성법을 이용한 천연가스 수송 및 저장, 기체분리 공정 등에서 열역학적 촉진제로 주목받고 있다. 본 연구에서는 TBAB의 열역학적 촉진제로서의 특성을 알아보기 위해 CH4+TBAB와 CO2+TBAB 혼합 하이드레이트계에 대하여 TBAB 농도(5, 32wt%)에 따른 가스 하이드레이트 3상(하이드레이트(H)-물(Lw)-기상(V)) 평형 조건을 측정하였다. 혼합 하이드레이트의 경우 TBAB의 농도가 5 wt%일 때에 비해 32 wt%일 경우에 열역학적 촉진 효과가 훨씬 크게 나타나는 것을 알 수 있었으며, 이는 순수 TBAB semi-clathrate의 농도별 상압 해리 온도 경향과 유사하였다. 또한, 13C NMR 분석을 통하여 CH4+TBAB 혼합 하이드레이트의 동공에 CH4 기체가 포집되어 있음을 확인하였고 이 동공의 특성이 순수 CH4 하이드레이트(구조-I)의 작은 동공(5(12))과 동일함을 확인할 수 있었다. |
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dc.identifier.bibliographicCitation | KOREAN CHEMICAL ENGINEERING RESEARCH(HWAHAK KONGHAK), v.49, no.3, pp.367 - 371 | - |
dc.identifier.issn | 0304-128X | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/9895 | - |
dc.language | 영어 | - |
dc.publisher | 한국화학공학회 | - |
dc.title.alternative | Phase equilibria and 13C NMR analysis of the double semi-clathrates containing TBAB | - |
dc.title | TBAB를 포함하는 혼합 하이드레이트의 상평형 및 13CnmR 분석 | - |
dc.type | Article | - |
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