There are no files associated with this item.
Full metadata record
DC Field | Value | Language |
---|---|---|
dc.citation.endPage | 8 | - |
dc.citation.startPage | 1 | - |
dc.citation.title | APPLIED CATALYSIS A-GENERAL | - |
dc.citation.volume | 572 | - |
dc.contributor.author | Jang, Eun Jeong | - |
dc.contributor.author | Lee, Jaekyoung | - |
dc.contributor.author | Jeong, Hu Young | - |
dc.contributor.author | Kwak, Ja Hun | - |
dc.date.accessioned | 2023-12-21T19:38:38Z | - |
dc.date.available | 2023-12-21T19:38:38Z | - |
dc.date.created | 2019-01-11 | - |
dc.date.issued | 2019-02 | - |
dc.description.abstract | The surface properties of catalyst supports are important in regulating the catalytic properties of heterogeneous catalysts. Herein, we studied the effect of acid-base properties of alumina on metal-support interaction and coke deposition, and investigated the stability of catalysts in propane dehydrogenation (PDH) using PtSn/Al2O3. We prepared γ-Al2O3 (A750) from ammonium aluminum carbonate hydroxide (AACH) and compared it with a commercial sample (Sasol Puralox SBA-200; P200). We loaded 0.5 wt% Pt and 0.9 wt% Sn on alumina then conducted propane dehydrogenation at 590 °C (WHSV = 5.2 h−1). PtSn/A750 and PtSn/P200 showed compatible initial activity (conversion = ˜50%) and selectivity (> 95%). After 20 h of reaction, PtSn/A750 showed a slight decrease in activity (39.9%) while the activity of PtSn/P200 dropped significantly (28.4%). Spent catalysts showed different metal sintering behavior and coke deposition which are well known causes for catalyst deactivation. A high strength of Lewis acid sites in A750 (higher Td in ethanol TPD) prevented the sintering of metal by strong metal-support interaction. Also, the lower number of Lewis acid sites in A750 than that of P200 reduced deposited coke on the catalysts (PtSn/A750: 1.8 wt% and PtSn/P200: 8.6 wt%). Furthermore, diffuse reflectance infrared Fourier-transform spectroscopy after CO adsorption at -150 °C clearly demonstrated that coke deposition was initiated from Lewis acid sites on the alumina surface, but then aromatization occurs at these sites. These results suggested that strong metal-support interactions to hold metal particles and less residual Lewis acid sites after metal loading to reduce coke deposition are important factors for designing stable and coke-resistant PtSn on alumina catalysts. Furthermore, precise characterization and understanding of the acid-base properties of alumina will contribute in developing catalysts with high stability. | - |
dc.identifier.bibliographicCitation | APPLIED CATALYSIS A-GENERAL, v.572, pp.1 - 8 | - |
dc.identifier.doi | 10.1016/j.apcata.2018.12.024 | - |
dc.identifier.issn | 0926-860X | - |
dc.identifier.scopusid | 2-s2.0-85059102459 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/25679 | - |
dc.identifier.url | https://www.sciencedirect.com/science/article/pii/S0926860X18306203?via%3Dihub | - |
dc.identifier.wosid | 000458471000001 | - |
dc.language | 영어 | - |
dc.publisher | ELSEVIER SCIENCE BV | - |
dc.title | Controlling the acid-base properties of alumina for stable PtSn-based propane dehydrogenation catalysts | - |
dc.type | Article | - |
dc.description.isOpenAccess | FALSE | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical; Environmental Sciences | - |
dc.relation.journalResearchArea | Chemistry; Environmental Sciences & Ecology | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordAuthor | Alumina surface properties | - |
dc.subject.keywordAuthor | Coke behavior | - |
dc.subject.keywordAuthor | Dehydrogenation | - |
dc.subject.keywordAuthor | Gamma alumina | - |
dc.subject.keywordAuthor | Propane | - |
dc.subject.keywordAuthor | Sintering | - |
dc.subject.keywordAuthor | Stability | - |
dc.subject.keywordPlus | ISOBUTANE DEHYDROGENATION | - |
dc.subject.keywordPlus | PLATINUM CATALYSTS | - |
dc.subject.keywordPlus | SN | - |
dc.subject.keywordPlus | SITES | - |
dc.subject.keywordPlus | HYDROGENATION | - |
dc.subject.keywordPlus | DEACTIVATION | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordPlus | SELECTIVITY | - |
dc.subject.keywordPlus | SUPPORT | - |
dc.subject.keywordPlus | PHASE | - |
Items in Repository are protected by copyright, with all rights reserved, unless otherwise indicated.
Tel : 052-217-1404 / Email : scholarworks@unist.ac.kr
Copyright (c) 2023 by UNIST LIBRARY. All rights reserved.
ScholarWorks@UNIST was established as an OAK Project for the National Library of Korea.