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Experimental and numerical investigation of NO oxidation on Pt/Al₂ O₃- and NOₓ storage on Pt/BaO/Al₂ O₃-catalysts

Wan, Sui ORCID iD icon 1; Keller, Kevin 2; Lott, Patrick ORCID iD icon 2; Shirsath, Akash Bhimrao 2; Tischer, Steffen ORCID iD icon 1; Häber, Thomas ORCID iD icon 2; Suntz, Rainer 2; Deutschmann, Olaf ORCID iD icon 1,2
1 Institut für Katalyseforschung und -technologie (IKFT), Karlsruher Institut für Technologie (KIT)
2 Institut für Technische Chemie und Polymerchemie (ITCP), Karlsruher Institut für Technologie (KIT)

Abstract:

Planar laser-induced fluorescence with laser synchronized flow control is employed as a non-invasive in situ technique to investigate a NOₓ storage catalyst, especially to grant a deeper insight into the reaction dynamics and its interaction with mass transfer. In addition to visualizing the spatial and temporal NO evolution over a Pt/BaO/Al₂O₃ catalyst, the spatially resolved NO distribution over a Pt/Al₂O₃ catalyst in the steady-state is measured to understand the oxidation of NO to NO₂ as a precursor step of NOₓ storage. The experimental results are compared with corresponding numerical simulations using transient one- and two-dimensional reactor simulations with detailed surface reaction mechanisms. The thermodynamic equilibrium for NO oxidation over Pt/Al₂O₃ approaches between 623 K and 723 K, as a reduced conversion is observed at a higher temperature. The NOₓ storage on the Pt/BaO/Al₂O₃ catalyst decreases with time, which is partly due to the reduced storage capacity, but also strongly limited by the NO oxidation rate.


Verlagsausgabe §
DOI: 10.5445/IR/1000149120
Veröffentlicht am 28.07.2022
Originalveröffentlichung
DOI: 10.1039/d2cy00572g
Scopus
Zitationen: 10
Web of Science
Zitationen: 8
Dimensions
Zitationen: 10
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Katalyseforschung und -technologie (IKFT)
Institut für Technische Chemie und Polymerchemie (ITCP)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 18.07.2022
Sprache Englisch
Identifikator ISSN: 2044-4753, 2044-4761
KITopen-ID: 1000149120
HGF-Programm 38.03.02 (POF IV, LK 01) Power-based Fuels and Chemicals
Weitere HGF-Programme 38.03.04 (POF IV, LK 01) Technical Fuel Assessment
Erschienen in Catalysis Science & Technology
Verlag Royal Society of Chemistry (RSC)
Band 12
Heft 14
Seiten 4456–4470
Vorab online veröffentlicht am 23.05.2022
Nachgewiesen in Web of Science
Dimensions
Scopus
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