On defects in highly a-oriented MFI membranes
DC Field | Value | Language |
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dc.contributor.author | Kim, Eunjoo | - |
dc.contributor.author | Choi, Jungkyu | - |
dc.contributor.author | Tsapatsis, Michael | - |
dc.date.accessioned | 2021-09-06T02:52:24Z | - |
dc.date.available | 2021-09-06T02:52:24Z | - |
dc.date.created | 2021-06-14 | - |
dc.date.issued | 2013-04 | - |
dc.identifier.issn | 1387-1811 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/103587 | - |
dc.description.abstract | Previously, uniformly a-oriented MFI films were synthesized via the secondary growth of an a-oriented seed layer, which was obtained by chemically depositing similar to 2 mu m thin-along-the-a-axis particles on a silica-coated alpha-Al2O3 porous disc (Choi et al., Angew. Chem. Int. Ed. 45 (2006) 1154-1158). Despite the uniformity of the a-orientation throughout the film, we found that the MFI membranes are not applicable for p-/o-xylene separation since they have significant crack and grain boundary defects. Accordingly, a-oriented MFI films were fabricated via alternative methods, motivated by the expected high separation performance that could be comparable to p-/o-xylene separations (100-400 separation factor) of a b-oriented MFI membrane. First, smaller 500 nm thin-along-the-a-axis MFI particles (small seeds) were used instead of 2 mu m thin-along-the-a-axis particles (large seeds) for seed deposition. Second, a seed layer was formed by a sonication-assisted physical deposition of the large seeds. Finally, an a-oriented seed layer comprising of the large seeds was epitaxially-grown to be the a-oriented MFI film by conducting two consecutive hydrothermal growth processes. The separation performance of the resultant MFI membranes was investigated via n-/i-butane and p-/o-xylene permeation tests. Maximum separation factors (SF) of similar to 4 and similar to 17 were achieved for p-/o-xylene and n-/i-butane isomers, respectively. These values are below the expected performance, indicating the presence of non-zeolitic pathways in a-oriented films. (C) 2012 Elsevier Inc. All rights reserved. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | ELSEVIER SCIENCE BV | - |
dc.subject | STRUCTURE-DIRECTING AGENTS | - |
dc.subject | MOLECULAR-SIEVE MEMBRANES | - |
dc.subject | ZEOLITE MEMBRANES | - |
dc.subject | SECONDARY GROWTH | - |
dc.subject | SEPARATION PERFORMANCE | - |
dc.subject | ZSM-5 MEMBRANES | - |
dc.subject | TUBULAR MEMBRANES | - |
dc.subject | ISOMER VAPORS | - |
dc.subject | SEEDED GROWTH | - |
dc.subject | PERMEATION | - |
dc.title | On defects in highly a-oriented MFI membranes | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Choi, Jungkyu | - |
dc.identifier.doi | 10.1016/j.micromeso.2012.11.023 | - |
dc.identifier.scopusid | 2-s2.0-84871777573 | - |
dc.identifier.wosid | 000315614700001 | - |
dc.identifier.bibliographicCitation | MICROPOROUS AND MESOPOROUS MATERIALS, v.170, pp.1 - 8 | - |
dc.relation.isPartOf | MICROPOROUS AND MESOPOROUS MATERIALS | - |
dc.citation.title | MICROPOROUS AND MESOPOROUS MATERIALS | - |
dc.citation.volume | 170 | - |
dc.citation.startPage | 1 | - |
dc.citation.endPage | 8 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalResearchArea | Science & Technology - Other Topics | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Applied | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical | - |
dc.relation.journalWebOfScienceCategory | Nanoscience & Nanotechnology | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.subject.keywordPlus | STRUCTURE-DIRECTING AGENTS | - |
dc.subject.keywordPlus | MOLECULAR-SIEVE MEMBRANES | - |
dc.subject.keywordPlus | ZEOLITE MEMBRANES | - |
dc.subject.keywordPlus | SECONDARY GROWTH | - |
dc.subject.keywordPlus | SEPARATION PERFORMANCE | - |
dc.subject.keywordPlus | ZSM-5 MEMBRANES | - |
dc.subject.keywordPlus | TUBULAR MEMBRANES | - |
dc.subject.keywordPlus | ISOMER VAPORS | - |
dc.subject.keywordPlus | SEEDED GROWTH | - |
dc.subject.keywordPlus | PERMEATION | - |
dc.subject.keywordAuthor | MFI (silicalite-1) membranes | - |
dc.subject.keywordAuthor | Film orientation | - |
dc.subject.keywordAuthor | Secondary (seeded) growth | - |
dc.subject.keywordAuthor | Xylene isomers | - |
dc.subject.keywordAuthor | Butane isomers | - |
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