Formation of ZIF-8 membranes inside porous supports for improving both their H-2/CO2 separation performance and thermal/mechanical stability
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Jang, Eunhee | - |
dc.contributor.author | Kim, Eunjoo | - |
dc.contributor.author | Kim, Heejoong | - |
dc.contributor.author | Lee, Taehee | - |
dc.contributor.author | Yeom, Hee-Jong | - |
dc.contributor.author | Kim, Young-Wook | - |
dc.contributor.author | Choi, Jungkyu | - |
dc.date.accessioned | 2021-09-03T00:09:19Z | - |
dc.date.available | 2021-09-03T00:09:19Z | - |
dc.date.created | 2021-06-19 | - |
dc.date.issued | 2017-10-15 | - |
dc.identifier.issn | 0376-7388 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/81901 | - |
dc.description.abstract | Zeolitic imidazolate framework-8 (ZIF-8) membranes are highly suitable as H-2-selective walls in membranes reactors used for water gas shift reactions because of their efficient molecular sieving properties that favor H-2 transport, coupled with their high thermal stability and processability. In this study, we adopted an in-situ counter diffusion method to fabricate a ZIF-8 membrane; Zn sources, already placed inside a porous support, were allowed to diffuse out and react with the 2-methylimidazole (mim) molecules in the bulk phase. Because the reaction rates between the Zn source and the mim molecule were very high, their diffusion rates played a key role in determining the final properties of the membranes. To control the diffusion rate, a hierarchically structured support, i.e., a gamma-Al2O3 layer-coated alpha-Al2O3 disc (gamma-/alpha-Al2O3 disc), was used in addition to an intact alpha-Al2O3 disc. ZIF-8 membranes in the alpha-Al2O3 disc (membrane ZIF-8_alpha) were primarily formed on top similar to a conventional supported-membrane, whereas those in the gamma-/alpha-Al2O3 disc (membrane ZIF-8_gamma alpha) were produced inside the support. As desired, membrane ZIF-8_gamma alpha showed marked H-2 separation performance with a maximum (max) H-2/CO2 separation factor (SF) of similar to 9.9 +/- 1.2 at 250 degrees C (vs. a max H-2/CO2 SF of similar to 7.5 +/- 0.2 for membrane ZIF-8_alpha). Although both type membranes persisted at 200 and 250 degrees C for up to 72 h, at a higher temperature of 300 degrees C, the membrane performance started deteriorating after similar to 2 h and similar to 10 h for membranes ZIF-8_alpha and ZIF-8_gamma alpha, respectively. This indicates that the gamma-Al2O3 layer served as a protective layer for preserving the performance of the ZIF-8 membrane. The performance at 300 degrees C was completely degraded due to the eventual conversion of ZIF-8 into ZnO phases. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | ELSEVIER SCIENCE BV | - |
dc.subject | MOLECULAR-SIEVE MEMBRANE | - |
dc.subject | ZEOLITIC IMIDAZOLATE FRAMEWORKS | - |
dc.subject | METAL-ORGANIC FRAMEWORK | - |
dc.subject | IN-SITU SYNTHESIS | - |
dc.subject | CARBON-DIOXIDE | - |
dc.subject | GAMMA-ALUMINA | - |
dc.subject | ADSORPTION PROPERTIES | - |
dc.subject | THERMAL-STABILITY | - |
dc.subject | COST-ANALYSIS | - |
dc.subject | HYDROGEN | - |
dc.title | Formation of ZIF-8 membranes inside porous supports for improving both their H-2/CO2 separation performance and thermal/mechanical stability | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Choi, Jungkyu | - |
dc.identifier.doi | 10.1016/j.memsci.2017.06.072 | - |
dc.identifier.scopusid | 2-s2.0-85021646118 | - |
dc.identifier.wosid | 000407954300043 | - |
dc.identifier.bibliographicCitation | JOURNAL OF MEMBRANE SCIENCE, v.540, pp.430 - 439 | - |
dc.relation.isPartOf | JOURNAL OF MEMBRANE SCIENCE | - |
dc.citation.title | JOURNAL OF MEMBRANE SCIENCE | - |
dc.citation.volume | 540 | - |
dc.citation.startPage | 430 | - |
dc.citation.endPage | 439 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Engineering | - |
dc.relation.journalResearchArea | Polymer Science | - |
dc.relation.journalWebOfScienceCategory | Engineering, Chemical | - |
dc.relation.journalWebOfScienceCategory | Polymer Science | - |
dc.subject.keywordPlus | MOLECULAR-SIEVE MEMBRANE | - |
dc.subject.keywordPlus | ZEOLITIC IMIDAZOLATE FRAMEWORKS | - |
dc.subject.keywordPlus | METAL-ORGANIC FRAMEWORK | - |
dc.subject.keywordPlus | IN-SITU SYNTHESIS | - |
dc.subject.keywordPlus | CARBON-DIOXIDE | - |
dc.subject.keywordPlus | GAMMA-ALUMINA | - |
dc.subject.keywordPlus | ADSORPTION PROPERTIES | - |
dc.subject.keywordPlus | THERMAL-STABILITY | - |
dc.subject.keywordPlus | COST-ANALYSIS | - |
dc.subject.keywordPlus | HYDROGEN | - |
dc.subject.keywordAuthor | ZIF-8 membranes | - |
dc.subject.keywordAuthor | in-situ counter diffusion method | - |
dc.subject.keywordAuthor | Embedded membranes | - |
dc.subject.keywordAuthor | H-2/CO2 separations | - |
dc.subject.keywordAuthor | High thermal/mechanical stability | - |
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.
(02841) 서울특별시 성북구 안암로 14502-3290-1114
COPYRIGHT © 2021 Korea University. All Rights Reserved.
Certain data included herein are derived from the © Web of Science of Clarivate Analytics. All rights reserved.
You may not copy or re-distribute this material in whole or in part without the prior written consent of Clarivate Analytics.