DC Field | Value | Language |
---|---|---|
dc.contributor.author | Kim, Beom-Sik | ko |
dc.contributor.author | Kim, Pyung Soon | ko |
dc.contributor.author | Bae, Junemin | ko |
dc.contributor.author | Jeong, Hojin | ko |
dc.contributor.author | Kim, Chang Hwan | ko |
dc.contributor.author | Lee, Hyunjoo | ko |
dc.date.accessioned | 2019-04-15T14:30:15Z | - |
dc.date.available | 2019-04-15T14:30:15Z | - |
dc.date.created | 2019-03-26 | - |
dc.date.issued | 2019-03 | - |
dc.identifier.citation | ENVIRONMENTAL SCIENCE & TECHNOLOGY, v.53, no.5, pp.2900 - 2907 | - |
dc.identifier.issn | 0013-936X | - |
dc.identifier.uri | http://hdl.handle.net/10203/254112 | - |
dc.description.abstract | A lean NOx trap (LNT) catalyst has been widely used for removing NOx exhaust from lean-burn engines. However, the operation range of LNT has been limited because of the poor activity of LNT catalysts at low temperatures (<= 300 degrees C), especially in urban driving conditions. To increase NOx removal efficiency during lean rich cycle operation, a Cu/CeO2 (CC) catalyst was added to a Pt-BaO/CeO2 (PBC) catalyst. In comparison to PBC- or CC-only catalysts, the physical mixture of PBC and CC catalysts (PBC + CC) exhibited a significant synergy for both NO, storage and reduction efficiencies. In particular, low-temperature activity below 200 degrees C was greatly enhanced. A Pt-BaO-Cu/CeO2 (PBCC) catalyst, which was synthesized by depositing Pt and Cu together on a ceria support, showed poorer NOx removal efficiency. The origin of the synergistic effect over PBC + CC was investigated. Under lean conditions, the CC showed much better activity for NO oxidation, allowing for faster NOx storage on PBC. Under rich conditions, H-2 was generated in situ on the CC by a water-gas shift reaction then accelerated the reduction of NOR, which had been stored on PBC, with a higher selectivity to N-2. This simple modification in the catalyst can provide an important clue to enhance low-temperature activity of the commercial LNT system. | - |
dc.language | English | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.title | Synergistic Effect of Cu/CeO2 and Pt-BaO/CeO2 Catalysts for a Low-Temperature Lean NOx Trap | - |
dc.type | Article | - |
dc.identifier.wosid | 000460709100066 | - |
dc.identifier.scopusid | 2-s2.0-85062373133 | - |
dc.type.rims | ART | - |
dc.citation.volume | 53 | - |
dc.citation.issue | 5 | - |
dc.citation.beginningpage | 2900 | - |
dc.citation.endingpage | 2907 | - |
dc.citation.publicationname | ENVIRONMENTAL SCIENCE & TECHNOLOGY | - |
dc.identifier.doi | 10.1021/acs.est.8b05329 | - |
dc.contributor.localauthor | Lee, Hyunjoo | - |
dc.contributor.nonIdAuthor | Kim, Pyung Soon | - |
dc.contributor.nonIdAuthor | Kim, Chang Hwan | - |
dc.description.isOpenAccess | N | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordPlus | WATER-GAS SHIFT | - |
dc.subject.keywordPlus | CUO-CEO2 CATALYSTS | - |
dc.subject.keywordPlus | CO OXIDATION | - |
dc.subject.keywordPlus | REDUCTION PROPERTIES | - |
dc.subject.keywordPlus | DOPED PEROVSKITE | - |
dc.subject.keywordPlus | STORAGE | - |
dc.subject.keywordPlus | PERFORMANCE | - |
dc.subject.keywordPlus | COPPER | - |
dc.subject.keywordPlus | PLATINUM | - |
dc.subject.keywordPlus | OXIDE | - |
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