Full metadata record

DC Field Value Language
dc.contributor.authorJeong, Yanghwan-
dc.contributor.authorLee, Minseong-
dc.contributor.authorLee, Gihoon-
dc.contributor.authorHong, Sungwon-
dc.contributor.authorJang, Eunhee-
dc.contributor.authorChoi, Nakwon-
dc.contributor.authorChoi, Jungkyu-
dc.date.accessioned2024-01-19T14:31:37Z-
dc.date.available2024-01-19T14:31:37Z-
dc.date.created2021-10-21-
dc.date.issued2021-06-07-
dc.identifier.issn2050-7488-
dc.identifier.urihttps://pubs.kist.re.kr/handle/201004/116868-
dc.description.abstractWe prepared a hydrophobic deca-dodecasil 3 rhombohedral@chabazite (DDR@CHA) zeolite hybrid film comprised mainly of DDR zeolite. Specifically, the pore size of the DDR zeolite (0.36 x 0.44 nm(2)) is ideal for molecular-sieve-based CO2 (0.33 nm) separation from CH4 (0.38 nm), which is critical for upgrading biogas. We demonstrated that an appropriate choice of calcination conditions was the key factor controlling the formation of defects and, consequently, determining the final membrane performance. Simply put, low-temperature calcination in O-3 eliminated defect formation and, thus, achieved a very high performance for dry CO2 permselectivity over CH4 (CO2/CH4 separation factor (SF) of ca. 523 +/- 96 at ca. 50 degrees C, which is a representative temperature of biogas streams). Surprisingly, high separation performances (CO2/CH4 SF of 422) for water-vapor-containing CO2/CH4 mixtures (at 100% humidity and 50 degrees C) required the formation of a few defects, which in turn necessitated optimal calcination at ca. 450 degrees C in O-2. The defect structures were quantitatively analyzed by combining fluorescence confocal optical microscopy with gas-permeation modeling. Furthermore, the inhibition of water-molecule-adsorption on CO2 permeation rates was estimated. This clearly revealed that fully opening the all-silica hydrophobic DDR zeolite micropores, while minimizing the formation of concomitant defects, helped to achieve the highest ever CO2 permselectivities for wet CO2/CH4 mixtures. In contrast, the elimination of defects by calcination in O-3 was the key to achieving a very high dry CO2/CH4 separation performance.-
dc.languageEnglish-
dc.publisherROYAL SOC CHEMISTRY-
dc.subjectMIXED-MATRIX MEMBRANES-
dc.subjectMETAL-ORGANIC FRAMEWORK-
dc.subjectCARBON-DIOXIDE CAPTURE-
dc.subjectZIF-90 MEMBRANE-
dc.subjectMICROSTRUCTURAL OPTIMIZATION-
dc.subjectSSZ-13 MEMBRANES-
dc.subjectGAS SEPARATION-
dc.subjectCO2 CAPTURE-
dc.subjectBIOGAS-
dc.subjectSELECTIVITY-
dc.titleUnavoidable but minimizable microdefects in a polycrystalline zeolite membrane: its remarkable performance for wet CO2/CH4 separation-
dc.typeArticle-
dc.identifier.doi10.1039/d1ta01286j-
dc.description.journalClass1-
dc.identifier.bibliographicCitationJOURNAL OF MATERIALS CHEMISTRY A, v.9, no.21, pp.12593 - 12605-
dc.citation.titleJOURNAL OF MATERIALS CHEMISTRY A-
dc.citation.volume9-
dc.citation.number21-
dc.citation.startPage12593-
dc.citation.endPage12605-
dc.description.journalRegisteredClassscie-
dc.description.journalRegisteredClassscopus-
dc.identifier.wosid000643916200001-
dc.identifier.scopusid2-s2.0-85107808399-
dc.relation.journalWebOfScienceCategoryChemistry, Physical-
dc.relation.journalWebOfScienceCategoryEnergy & Fuels-
dc.relation.journalWebOfScienceCategoryMaterials Science, Multidisciplinary-
dc.relation.journalResearchAreaChemistry-
dc.relation.journalResearchAreaEnergy & Fuels-
dc.relation.journalResearchAreaMaterials Science-
dc.type.docTypeArticle-
dc.subject.keywordPlusMIXED-MATRIX MEMBRANES-
dc.subject.keywordPlusMETAL-ORGANIC FRAMEWORK-
dc.subject.keywordPlusCARBON-DIOXIDE CAPTURE-
dc.subject.keywordPlusZIF-90 MEMBRANE-
dc.subject.keywordPlusMICROSTRUCTURAL OPTIMIZATION-
dc.subject.keywordPlusSSZ-13 MEMBRANES-
dc.subject.keywordPlusGAS SEPARATION-
dc.subject.keywordPlusCO2 CAPTURE-
dc.subject.keywordPlusBIOGAS-
dc.subject.keywordPlusSELECTIVITY-
Appears in Collections:
KIST Article > 2021
Files in This Item:
There are no files associated with this item.
Export
RIS (EndNote)
XLS (Excel)
XML

qrcode

Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.

BROWSE