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Seo, Yongwon
Advanced Clean Energy Lab.
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dc.citation.endPage 119 -
dc.citation.startPage 113 -
dc.citation.title JOURNAL OF CHEMICAL THERMODYNAMICS -
dc.citation.volume 65 -
dc.contributor.author Lee, Seungmin -
dc.contributor.author Lee, Youngjun -
dc.contributor.author Park, Sungwon -
dc.contributor.author Kim, Yunju -
dc.contributor.author Cha, Inuk -
dc.contributor.author Seo, Yongwon -
dc.date.accessioned 2023-12-22T03:37:00Z -
dc.date.available 2023-12-22T03:37:00Z -
dc.date.created 2013-08-28 -
dc.date.issued 2013-10 -
dc.description.abstract In this study, the stability conditions and guest distributions of methane (CH4) + ethane (C2H6) + propane (C 3H8) hydrates or semiclathrates are examined in the presence of tetrahydrofuran (THF) and quaternary ammonium salts such as tetra-n-butylammonium bromide (TBAB) and tetra-n-butylammonium fluoride (TBAF) through thermodynamic and spectroscopic analyses. The three-phase equilibria of hydrate or semiclathrate (H), liquid water (LW), and vapor (V) for the quinary CH4 + C2H6 + C3H 8 + THF + water, CH4 + C2H6 + C 3H8 + TBAB + water, and CH4 + C 2H6 + C3H8 + TBAF + water mixtures with various concentrations were experimentally measured in order to determine the hydrate or semiclathrate stability conditions. The experimental results demonstrated that all thermodynamic promoters such as THF, TBAB, and TBAF used in this study could remarkably stabilize the hydrate dissociation conditions even though the degree of stabilization was dependent on the type of promoters and on the concentrations of each promoter used. From the 13C NMR analysis, preferential occupation of CH4 molecules in the hydrate or semiclathrate lattices was observed at the stoichiometric concentrations of each hydrate or semiclathrate structure. However, at the THF mole fraction lower than 0.056, the large cages of structure II were shared by CH4, C2H6, C3H8, and THF molecules, whereas the small cages were occupied by only CH4 molecules. The results given in this study are very useful in understanding the thermodynamic stability, structural characteristics, and guest distribution of the hydrates or semiclathrates with multi-components in the presence of thermodynamic promoters for further applications in gas storage and separation processes. -
dc.identifier.bibliographicCitation JOURNAL OF CHEMICAL THERMODYNAMICS, v.65, pp.113 - 119 -
dc.identifier.doi 10.1016/j.jct.2013.05.042 -
dc.identifier.issn 0021-9614 -
dc.identifier.scopusid 2-s2.0-84879233114 -
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/3764 -
dc.identifier.url http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=84879233114 -
dc.identifier.wosid 000323600300017 -
dc.language 영어 -
dc.publisher ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD -
dc.title Stability conditions and guest distribution of the methane plus ethane plus propane hydrates or semiclathrates in the presence of tetrahydrofuran or quaternary ammonium salts -
dc.type Article -
dc.description.isOpenAccess FALSE -
dc.relation.journalWebOfScienceCategory Thermodynamics; Chemistry, Physical -
dc.relation.journalResearchArea Thermodynamics; Chemistry -
dc.description.journalRegisteredClass scie -
dc.description.journalRegisteredClass scopus -
dc.subject.keywordAuthor Gas hydrate -
dc.subject.keywordAuthor Semiclathrate -
dc.subject.keywordAuthor Natural gas -
dc.subject.keywordAuthor Gas storage -
dc.subject.keywordAuthor Promoter -
dc.subject.keywordAuthor Phase equilibria -
dc.subject.keywordPlus N-BUTYLAMMONIUM BROMIDE -
dc.subject.keywordPlus CLATHRATE HYDRATE -
dc.subject.keywordPlus NATURAL-GAS -
dc.subject.keywordPlus SILICA-GELS -
dc.subject.keywordPlus THERMODYNAMIC STABILITY -
dc.subject.keywordPlus PHASE-EQUILIBRIA -
dc.subject.keywordPlus FLUORIDE -
dc.subject.keywordPlus TETRABUTYLAMMONIUM -
dc.subject.keywordPlus MIXTURES -
dc.subject.keywordPlus HYDROGEN -

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