Enhanced Sulfur Tolerance of Ceria-Promoted NOx Storage Reduction (NSR) Catalysts: Sulfur Uptake, Thermal Regeneration and Reduction with H2(g) Full article
Conference |
IX International Conference “Mechanisms of Catalytic Reactions” 22-25 Oct 2012 , Санкт-Петербург |
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Journal |
Topics in Catalysis
ISSN: 1022-5528 , E-ISSN: 1572-9028 |
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Output data | Year: 2013, Volume: 56, Number: 11, Pages: 950-957 Pages count : 8 DOI: 10.1007/s11244-013-0059-5 | ||||
Tags | Ceria, DeNO x, NO x, NSR, SO x, Sulfur poisoning | ||||
Authors |
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Affiliations |
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Funding (2)
1 | Russian Foundation for Basic Research | 12-03-91373 |
2 | Türkiye Bilimler Akademisi |
Abstract:
SO x uptake, thermal regeneration and the reduction of SO x 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 SO x oxidation and SO x 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 SO x 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 SO x reduction with H2(g).
Cite:
Say Z.
, Vovk E.I.
, Bukhtiyarov V.I.
, Ozensoy E.
Enhanced Sulfur Tolerance of Ceria-Promoted NOx Storage Reduction (NSR) Catalysts: Sulfur Uptake, Thermal Regeneration and Reduction with H2(g)
Topics in Catalysis. 2013. V.56. N11. P.950-957. DOI: 10.1007/s11244-013-0059-5 WOS Scopus РИНЦ
Enhanced Sulfur Tolerance of Ceria-Promoted NOx Storage Reduction (NSR) Catalysts: Sulfur Uptake, Thermal Regeneration and Reduction with H2(g)
Topics in Catalysis. 2013. V.56. N11. P.950-957. DOI: 10.1007/s11244-013-0059-5 WOS Scopus РИНЦ
Files:
Full text from publisher
Dates:
Published online: | May 16, 2013 |
Published print: | Aug 1, 2013 |
Identifiers:
Web of science | WOS:000321664200012 |
Scopus | 2-s2.0-84880434226 |
Elibrary | 20443545 |
Chemical Abstracts | 2013:766224 |
Chemical Abstracts (print) | 159:139178 |
OpenAlex | W2153283586 |