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Understanding the multiple interactions in vanadium-based SCR catalysts during simultaneous NO$_{x}$ and soot abatement

Zheng, Lei 1; Casapu, Maria 1; Grunwaldt, Jan-Dierk ORCID iD icon 1,2
1 Institut für Technische Chemie und Polymerchemie (ITCP), Karlsruher Institut für Technologie (KIT)
2 Institut für Katalyseforschung und -technologie (IKFT), Karlsruher Institut für Technologie (KIT)


The recently proposed 2-way SCRonDPF systems, which consist of selective catalytic reduction (SCR) catalysts coated on diesel particulate filters (DPFs), are promising to simultaneously remove NOx and soot emissions. However, such multifunctional systems are very demanding due to the presence of various interacting phases as well as concurrent reactions competing for the same active sites. In the present study, a simple to complex strategy was employed to understand the multiple interactions during combined NOx and soot removal over a V-based SCR catalyst. First the effect of NO$_{2}$, NO, H$_{2}$O and NH$_{3}$ on soot oxidation was studied on soot alone and then in loose and tight contact with the V-based catalyst. In a next step, the effect of various SCR gas mixtures was investigated. For the gas–soot interplay, NO$_{2}$, NO and NH$_{3}$ were found to exhibit a promotional, non-inhibitory and inhibitory effect on soot oxidation, respectively. Ammonia–soot interaction dominates the soot oxidation in a standard SCR gas feed if no catalyst is present, while the co-presence of NO$_{2}$ in the fast SCR gas mixture results in a faster soot oxidation. ... mehr

Verlagsausgabe §
DOI: 10.5445/IR/1000148028
Veröffentlicht am 22.06.2022
DOI: 10.1039/d2cy00432a
Zitationen: 2
Zitationen: 2
Cover der Publikation
Zugehörige Institution(en) am KIT Institut für Katalyseforschung und -technologie (IKFT)
Institut für Technische Chemie und Polymerchemie (ITCP)
Publikationstyp Zeitschriftenaufsatz
Publikationsdatum 20.06.2022
Sprache Englisch
Identifikator ISSN: 2044-4753, 2044-4761
KITopen-ID: 1000148028
Erschienen in Catalysis Science & Technology
Verlag Royal Society of Chemistry (RSC)
Band 12
Heft 12
Seiten 3969–3981
Nachgewiesen in Web of Science
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