Sulfur Poisoning and Regeneration Behavior of Perovskite-Based NO Oxidation Catalysts Full article
Conference |
EuropaCat-XII: 12th European Congress on Catalysis “Catalysis: Balancing the use of fossil and renewable resources” 30 Aug - 4 Sep 2015 , Казань |
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Journal |
Topics in Catalysis
ISSN: 1022-5528 , E-ISSN: 1572-9028 |
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Output data | Year: 2017, Volume: 60, Number: 1-2, Pages: 40-51 Pages count : 12 DOI: 10.1007/s11244-016-0721-9 | ||||||||
Tags | DeNOx, FTIR, LaCoO3, LaMnO3, LNT, Pd | ||||||||
Authors |
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Affiliations |
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Funding (3)
1 | Türkiye Bilimsel ve Teknolojik Araştırma Kurumu | |
2 | Türkiye Bilimsel ve Teknolojik Araştırma Kurumu | 213M585 |
3 | Republic of Turkey Ministry of Development | DPT2006K–120470 |
Abstract:
SOx uptake and release properties of LaMnO3, Pd/LaMnO3, LaCoO3 and Pd/LaCoO3 perovskites were investigated via in situ Fourier transform infrared (FTIR) spectroscopy, temperature programmed desorption and X-ray photoelectron spectroscopy. Sulfation of the perovskite leads to the formation of surface sulfite/sulfate and bulk-like sulfate species. Pd addition to LaMnO3 and LaCoO3 significantly increases the sulfur adsorption capacity. Pd/LaMnO3 sample accumulates significantly more sulfur than LaMnO3; however it can also release a larger fraction of the accumulated SOx species in a reversible fashion at elevated temperatures in vacuum. This is not the case for Co-based materials, where thermal regeneration of bulk sulfates on poisoned LaCoO3 and Pd/LaCoO3 is extremely ineffective under similar conditions. However, in the presence of an external reducing agent such as H2 (g), Pd/LaMnO3 requires much lower temperature (873 K) for complete sulfur regeneration as compared to that of Pd/LaCoO3 (973 K). Sequential CO and SOx adsorption experiments performed via in situ FTIR indicate that in the presence of carbonyls and/or carbonates, Pd adsorption sites may have a stronger affinity for SOx as compared to that of the perovskite surface, particularly in the early stages of sulfur poisoning.
Cite:
Kurt M.
, Say Z.
, Ercan K.E.
, Vovk E.I.
, Kim C.H.
, Ozensoy E.
Sulfur Poisoning and Regeneration Behavior of Perovskite-Based NO Oxidation Catalysts
Topics in Catalysis. 2017. V.60. N1-2. P.40-51. DOI: 10.1007/s11244-016-0721-9 WOS Scopus РИНЦ
Sulfur Poisoning and Regeneration Behavior of Perovskite-Based NO Oxidation Catalysts
Topics in Catalysis. 2017. V.60. N1-2. P.40-51. DOI: 10.1007/s11244-016-0721-9 WOS Scopus РИНЦ
Files:
Full text from publisher
Dates:
Published online: | Sep 29, 2016 |
Published print: | Feb 1, 2017 |
Identifiers:
Web of science | WOS:000395015100005 |
Scopus | 2-s2.0-85013972960 |
Elibrary | 29484984 |
Chemical Abstracts | 2016:1595620 |
Chemical Abstracts (print) | 166:240129 |
OpenAlex | W2524397729 |