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DC Field | Value | Language |
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dc.citation.endPage | 7 | - |
dc.citation.number | 1 | - |
dc.citation.startPage | 2 | - |
dc.citation.title | CATALYSIS TODAY | - |
dc.citation.volume | 184 | - |
dc.contributor.author | Kim, Do Heui | - |
dc.contributor.author | Mudiyanselage, K. | - |
dc.contributor.author | Szanyi, J. | - |
dc.contributor.author | Zhu, H. | - |
dc.contributor.author | Kwak, Jahun | - |
dc.contributor.author | Peden, Charles H. F. | - |
dc.date.accessioned | 2023-12-22T05:12:13Z | - |
dc.date.available | 2023-12-22T05:12:13Z | - |
dc.date.created | 2015-07-20 | - |
dc.date.issued | 2012-04 | - |
dc.description.abstract | We report the various characteristics of Pt-K/MgAl2O4 lean NOx trap (LNT) catalysts including the effect of K loading on nitrate formation/decomposition, NOx storage activity, and durability. This work provides results aimed at developing a fundamental understanding of this new class of LNT catalysts, which could be good candidates for high temperature engine exhaust NOx removal applications. Upon the adsorption of NO2 on K/MgAl2O4 samples, potassium nitrates, formed at Mg-related sites on the MgAl2O4 support material surface, are observed in addition to the two (ionic and bidentate) potassium nitrate species observed to form on Al2O3-supported samples. Based on NO2 TPD and FTIR results, the Mg-bound KNO3 species thermally decompose at higher temperatures than Al-bound KNO3, implying its superior thermal stability. At a potassium loading of 5 wt% on MgAl2O4, the temperature of maximum NOx uptake (T-max) is 300 degrees C. Increasing the potassium loading from 5 wt% to 10 wt% results in a monotonic shift in the T-max to 450 degrees C, demonstrating an unexpectedly significant dependence of T-max on the potassium loading. Further increases in potassium loading above 10 wt%, however, only give rise to a reduction in the overall NOx storage capacity. This work also highlights the obstacles to the implementation of these materials for practical applications associated with their durability and sulfur poisoning/removal. (C) 2011 Elsevier B.V. All rights reserved | - |
dc.identifier.bibliographicCitation | CATALYSIS TODAY, v.184, no.1, pp.2 - 7 | - |
dc.identifier.doi | 10.1016/j.cattod.2011.11.024 | - |
dc.identifier.issn | 0920-5861 | - |
dc.identifier.scopusid | 2-s2.0-84860253846 | - |
dc.identifier.uri | https://scholarworks.unist.ac.kr/handle/201301/12294 | - |
dc.identifier.url | http://www.sciencedirect.com/science/article/pii/S0920586111008005# | - |
dc.identifier.wosid | 000303108100002 | - |
dc.language | 영어 | - |
dc.publisher | ELSEVIER SCIENCE BV | - |
dc.title.alternative | Characteristics of Pt-K/MgAl2O4 lean NOx trap catalysts | - |
dc.title | Characteristics of Pt-K/MgAl2O4 lean NOx trap catalysts | - |
dc.type | Article | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.subject.keywordAuthor | Pt-K/MgAl2O4 | - |
dc.subject.keywordAuthor | Lean NOx trap catalyst | - |
dc.subject.keywordAuthor | MgAl2O4 support | - |
dc.subject.keywordAuthor | FTIR | - |
dc.subject.keywordAuthor | K loading | - |
dc.subject.keywordAuthor | Durability | - |
dc.subject.keywordPlus | STORAGE PERFORMANCE | - |
dc.subject.keywordPlus | NSR CATALYSTS | - |
dc.subject.keywordPlus | ADSORPTION | - |
dc.subject.keywordPlus | REDUCTION | - |
dc.subject.keywordPlus | PT/K/AL2O3 | - |
dc.subject.keywordPlus | SULFATION | - |
dc.subject.keywordPlus | BEHAVIOR | - |
dc.subject.keywordPlus | BAO | - |
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