Enhanced sulfur tolerance of ceria-promoted NOx storage reduction (NSR) catalysts: sulfur uptake, thermal regeneration and reduction with H2(g)

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dc.citation.epage957en_US
dc.citation.issueNumber11en_US
dc.citation.spage950en_US
dc.citation.volumeNumber56en_US
dc.contributor.authorSay, Z.en_US
dc.contributor.authorVovk, E. I.en_US
dc.contributor.authorBukhtiyarov, V. I.en_US
dc.contributor.authorOzensoy, E.en_US
dc.date.accessioned2016-02-08T12:08:07Z
dc.date.available2016-02-08T12:08:07Z
dc.date.issued2013en_US
dc.departmentDepartment of Chemistryen_US
dc.description.abstractSOx uptake, thermal regeneration and the reduction of SOx via H2(g) over ceria-promoted NSR catalysts were investigated. Sulfur poisoning and desulfation pathways of the complex BaO/Pt/CeO2/Al2O3 NSR system was investigated using a systematic approach where the functional sub-components such as Al2O3, CeO2/Al2O3, BaO/Al2O3, BaO/CeO2/Al2O3, and BaO/Pt/Al2O3 were studied in a comparative fashion. Incorporation of ceria significantly increases the S-uptake of Al2O3 and BaO/ Al2O3 under both moderate and extreme S-poisoning conditions. Under moderate S-poisoning conditions, Pt sites seem to be the critical species for SOx oxidation and SOx storage, where BaO/Pt/Al2O3 and BaO/Pt/CeO2/Al2O3 catalysts reveal a comparable extent of sulfation. After extreme S-poisoning due to the deactivation of most of the Pt sites, ceria domains are the main SOx storage sites on the BaO/Pt/CeO2/Al2O3 surface. Thus, under these conditions, BaO/Pt/CeO2/Al2O3 surface stores more sulfur than that of BaO/Pt/Al2O3. BaO/Pt/CeO2/Al2O3 reveals a significantly improved thermal regeneration behavior in vacuum with respect to the conventional BaO/Pt/Al2O3 catalyst. Ceria promotion remarkably enhances the SOx reduction with H2(g).en_US
dc.identifier.doi10.1007/s11244-013-0059-5en_US
dc.identifier.eissn1572-9028
dc.identifier.issn1022-5528
dc.identifier.urihttp://hdl.handle.net/11693/28005
dc.language.isoEnglishen_US
dc.publisherSpringer New York LLCen_US
dc.relation.isversionofhttp://dx.doi.org/10.1007/s11244-013-0059-5en_US
dc.source.titleTopics in Catalysisen_US
dc.subjectCeriaen_US
dc.subjectDeNOxen_US
dc.subjectNOxen_US
dc.subjectNSRen_US
dc.subjectSOxen_US
dc.subjectSulfur poisoningen_US
dc.titleEnhanced sulfur tolerance of ceria-promoted NOx storage reduction (NSR) catalysts: sulfur uptake, thermal regeneration and reduction with H2(g)en_US
dc.typeArticleen_US
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