DC Field | Value | Language |
---|---|---|
dc.contributor.author | Min, HK | - |
dc.contributor.author | Cha, SH | - |
dc.contributor.author | Hong, SB | - |
dc.date.accessioned | 2016-03-31T08:58:44Z | - |
dc.date.available | 2016-03-31T08:58:44Z | - |
dc.date.created | 2012-07-24 | - |
dc.date.issued | 2012-06 | - |
dc.identifier.issn | 2155-5435 | - |
dc.identifier.other | 2012-OAK-0000025678 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/16412 | - |
dc.description.abstract | The mechanisms of m-xylene isomerization and disproportionation over 13 medium-pore zeolites and three large-pore ones are investigated. While H-TNU-10 and H-ZSM-57 with intersecting 10- and 8-ring channels were found to show considerably higher p/o ratios than H-ZSM-S, a commercial m-xylene isomerization catalyst, the GC-MS results from used zeolite catalysts demonstrate the intrazeolitic build-up of tri- and tetramethylated diphenylmethane species, whose existence during the m-xylene transformation over any acidic catalyst has not been experimentally verified until now. These dicyclic aromatic compounds were ascertained to serve as reaction intermediates of bimolecular m-xylene isomerization within the micropores not only of large-pore zeolites but also of medium-pore materials at temperatures lower than 523 K or so, once there are internal void spaces larger than 10-rings. Flushing experiments with used zeolites followed by GC-MS analyses strongly suggest that the high p-xylene selectivity found in some medium-pore zeolites is largely due to product shape selectivity rather than to transition state one. More importantly, the overall GC-MS results of our work demonstrate that transition state and product shape selectivities are experimentally distinguishable from each other. | - |
dc.description.statementofresponsibility | X | - |
dc.language | English | - |
dc.publisher | AMERICAN CHEMICAL SOCIETY | - |
dc.relation.isPartOf | ACS CATALYSIS | - |
dc.subject | zeolites | - |
dc.subject | m-xylene isomerization | - |
dc.subject | shape selective catalysis | - |
dc.subject | transition states | - |
dc.subject | GC-MS | - |
dc.subject | reaction mechanism | - |
dc.subject | LARGE-PORE ZEOLITES | - |
dc.subject | HIGH-SILICA ZEOLITE | - |
dc.subject | ETHYLBENZENE DISPROPORTIONATION | - |
dc.subject | SHAPE SELECTIVITY | - |
dc.subject | COKE FORMATION | - |
dc.subject | META-XYLENE | - |
dc.subject | TOPOLOGY | - |
dc.subject | TRANSFORMATION | - |
dc.subject | FRAMEWORK | - |
dc.subject | NU-87 | - |
dc.title | Mechanistic Insights into the Zeolite-Catalyzed Isomerization and Disproportionation of m-Xylene | - |
dc.type | Article | - |
dc.contributor.college | 환경공학부 | - |
dc.identifier.doi | 10.1021/CS300127W | - |
dc.author.google | Min, HK | - |
dc.author.google | Cha, SH | - |
dc.author.google | Hong, SB | - |
dc.relation.volume | 2 | - |
dc.relation.issue | 6 | - |
dc.relation.startpage | 971 | - |
dc.relation.lastpage | 981 | - |
dc.contributor.id | 10077624 | - |
dc.relation.journal | ACS CATALYSIS | - |
dc.relation.index | SCI급, SCOPUS 등재논문 | - |
dc.relation.sci | SCI | - |
dc.collections.name | Journal Papers | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | ACS CATALYSIS, v.2, no.6, pp.971 - 981 | - |
dc.identifier.wosid | 000304682600009 | - |
dc.date.tcdate | 2019-01-01 | - |
dc.citation.endPage | 981 | - |
dc.citation.number | 6 | - |
dc.citation.startPage | 971 | - |
dc.citation.title | ACS CATALYSIS | - |
dc.citation.volume | 2 | - |
dc.contributor.affiliatedAuthor | Hong, SB | - |
dc.identifier.scopusid | 2-s2.0-84861797100 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.wostc | 35 | - |
dc.description.scptc | 31 | * |
dc.date.scptcdate | 2018-05-121 | * |
dc.type.docType | Article | - |
dc.subject.keywordPlus | LARGE-PORE ZEOLITES | - |
dc.subject.keywordPlus | HIGH-SILICA ZEOLITE | - |
dc.subject.keywordPlus | ETHYLBENZENE DISPROPORTIONATION | - |
dc.subject.keywordPlus | SHAPE SELECTIVITY | - |
dc.subject.keywordPlus | COKE FORMATION | - |
dc.subject.keywordPlus | META-XYLENE | - |
dc.subject.keywordPlus | TOPOLOGY | - |
dc.subject.keywordPlus | TRANSFORMATION | - |
dc.subject.keywordPlus | FRAMEWORK | - |
dc.subject.keywordPlus | NU-87 | - |
dc.subject.keywordAuthor | zeolites | - |
dc.subject.keywordAuthor | m-xylene isomerization | - |
dc.subject.keywordAuthor | shape selective catalysis | - |
dc.subject.keywordAuthor | transition states | - |
dc.subject.keywordAuthor | GC-MS | - |
dc.subject.keywordAuthor | reaction mechanism | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
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