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DC Field | Value | Language |
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dc.citation.number | 3 | - |
dc.citation.startPage | 137169 | - |
dc.citation.title | CHEMICAL ENGINEERING JOURNAL | - |
dc.citation.volume | 446 | - |
dc.contributor.author | Lee, Sungjune | - |
dc.contributor.author | Kim, Chul-Ung | - |
dc.contributor.author | Kim, Jeong-Chul | - |
dc.contributor.author | Lee, Su-Un | - |
dc.contributor.author | Kwak, Ja Hun | - |
dc.contributor.author | Ryoo, Ryong | - |
dc.contributor.author | Kim, Tae-Wan | - |
dc.date.accessioned | 2023-12-21T13:36:54Z | - |
dc.date.available | 2023-12-21T13:36:54Z | - |
dc.date.created | 2023-01-02 | - |
dc.date.issued | 2022-10 | - |
dc.description.abstract | A highly selective means of producing propylene via the ethylene-to-propylene (ETP) reaction is required to manage the supply-demand balance of light olefins. To improve the catalytic activity of the ETP reaction, a phosphorus-modified SSZ-13 zeolite (P-SSZ-13) was prepared by introducing phosphorus to the SSZ-13 zeolite via a simple impregnation method. The P-SSZ-13 catalyst exhibited increased propylene selectivity and yield compared to the pristine catalyst. According to solid-state NMR spectroscopy and STEM-EDS observation, the phosphorus species were mainly located on the outer part of the crystal as a form of polyphosphate. To reveal the effect of the phosphorus loading on the enhancement of ETP reactivity, a series of surface-modified SSZ-13 catalysts were prepared and investigated. It was found that the polyphosphate species in the P-SSZ-13 catalyst not only weakened the acidity of the zeolite by bonding with the framework aluminum species but also reduced the diffusion out of the relatively large-sized hydrocarbon species by partially blocking the pore mouths. The change in the diffusivity of the hydrocarbons over the SSZ-13 catalysts also affected the ETP reactivity. The relationship between the amount of phosphorus and the ETP reactivity of the P-SSZ-13 catalysts could also be clearly demonstrated in terms of the change in both acidity and intracrystalline diffusivity. Moreover, 13C MAS NMR measurement with isotopic switch experiment confirmed the alkyl naphthalene-based hydrocarbon pool mechanism over the P-SSZ-13 for the ETP reaction. | - |
dc.identifier.bibliographicCitation | CHEMICAL ENGINEERING JOURNAL, v.446, no.3, pp.137169 | - |
dc.identifier.doi | 10.1016/j.cej.2022.137169 | - |
dc.identifier.issn | 1385-8947 | - |
dc.identifier.scopusid | 2-s2.0-85131443500 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/60709 | - |
dc.identifier.url | https://www.sciencedirect.com/science/article/pii/S1385894722026596?via%3Dihub | - |
dc.identifier.wosid | 000810444900004 | - |
dc.language | 영어 | - |
dc.publisher | ELSEVIER SCIENCE SA | - |
dc.title | Enhanced catalytic activity of phosphorus-modified SSZ-13 zeolite in the ethylene-to-propylene reaction by controlling acidity and intracrystalline diffusivity | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.relation.journalWebOfScienceCategory | Engineering, Environmental; Engineering, Chemical | - |
dc.relation.journalResearchArea | Engineering | - |
dc.type.docType | Article | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordAuthor | Ethylene-to-propylene | - |
dc.subject.keywordAuthor | Propylene production | - |
dc.subject.keywordAuthor | Olefin interconversion | - |
dc.subject.keywordAuthor | SSZ-13 | - |
dc.subject.keywordAuthor | Phosphorus modification | - |
dc.subject.keywordAuthor | Intracrystalline diffusivity | - |
dc.subject.keywordPlus | CONVERSION | - |
dc.subject.keywordPlus | PROPENE | - |
dc.subject.keywordPlus | OLEFINS | - |
dc.subject.keywordPlus | ETHENE | - |
dc.subject.keywordPlus | HYDROCARBONS | - |
dc.subject.keywordPlus | MECHANISM | - |
dc.subject.keywordPlus | CRACKING | - |
dc.subject.keywordPlus | H-ZSM-5 | - |
dc.subject.keywordPlus | SAPO-34 | - |
dc.subject.keywordPlus | HZSM-5 | - |
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