DC Field | Value | Language |
---|---|---|
dc.contributor.author | Choi, Hyun June | - |
dc.contributor.author | Hong, Suk Bong | - |
dc.date.accessioned | 2022-01-28T05:00:26Z | - |
dc.date.available | 2022-01-28T05:00:26Z | - |
dc.date.created | 2022-01-07 | - |
dc.date.issued | 2022-04 | - |
dc.identifier.issn | 1385-8947 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/109230 | - |
dc.description.abstract | Here, we compare the CO2 adsorption properties of the Na+ form of a series of gismondine (framework type GIS) zeolites with Si/Al ratios of 1.5–4.7 in order to understand the effect of framework Al (thus extraframework Na+) content on the actual adsorption mechanism on this type of small-pore zeolites. Negligible CO2 uptake (≤0.7 mmol g−1 at 25 °C and 1.0 bar) was observed for Na-GIS-1.5 and Na-GIS-2.2, because the number of extraframework cations near their 8-ring windows are large enough to sterically hinder CO2 adsorption. Unlike that on Na-GIS-4.7 with an uptake of 3.0 mmol g−1, on the other hand, CO2 adsorption on Na-GIS-2.5, Na-GIS-2.8, and Na-GIS-3.0 was found to show one clear step but at different pressures, probably due to small differences in the number of gating cations with high site occupancy located near the distorted 8-ring windows. While the adsorption behavior of both Na-GIS-2.8 and Na-GIS-3.0 appears to begin by the relocation of some gating cations with high site occupancy without notable structural breathing, i.e., the cooperative cation gating-breathing mechanism, with the former effect being more dominant, the behavior of Na-GIS-2.5 and Na-GIS-4.7 can be understood based on the cation gating and molecular sieving effects, respectively. The overall results of this study demonstrate that the framework Si/Al ratio of GIS-type zeolites is key to governing their CO2 adsorption mechanism. | - |
dc.language | English | - |
dc.publisher | Elsevier BV | - |
dc.relation.isPartOf | Chemical Engineering Journal | - |
dc.title | Effect of framework Si/Al ratio on the mechanism of CO2 adsorption on the small-pore zeolite gismondine | - |
dc.type | Article | - |
dc.identifier.doi | 10.1016/j.cej.2021.133800 | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | Chemical Engineering Journal, v.433 | - |
dc.identifier.wosid | 000773071600002 | - |
dc.citation.title | Chemical Engineering Journal | - |
dc.citation.volume | 433 | - |
dc.contributor.affiliatedAuthor | Choi, Hyun June | - |
dc.contributor.affiliatedAuthor | Hong, Suk Bong | - |
dc.identifier.scopusid | 2-s2.0-85120770555 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | N | - |
dc.type.docType | Article | - |
dc.subject.keywordPlus | SEPARATION | - |
dc.subject.keywordPlus | CAPTURE | - |
dc.subject.keywordPlus | FAMILY | - |
dc.subject.keywordPlus | RHO | - |
dc.subject.keywordAuthor | Adsorption mechanism | - |
dc.subject.keywordAuthor | Carbon dioxide capture | - |
dc.subject.keywordAuthor | Framework Si/Al ratio | - |
dc.subject.keywordAuthor | Zeolite gismondine | - |
dc.relation.journalWebOfScienceCategory | Engineering, Environmental | - |
dc.relation.journalWebOfScienceCategory | Engineering, Chemical | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Engineering | - |
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