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Topics in Catalysis
Published in: Topics in Catalysis 10-12/2016

03-05-2016 | Original Paper

New Insights into the Mechanism of Synergistic Effect for [CeO2–ZrO2 + H-Beta] CombiCat in NH3–SCR

Authors: Alina I. Mytareva, Alexander Yu. Stakheev, Galina N. Baeva, Dmitriy A. Bokarev, Arkady L. Kustov, Joakim R. Thøgersen

Published in: Topics in Catalysis | Issue 10-12/2016

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Abstract

NH3–SCR performance of the combined catalyst (CombiCats) prepared by mechanical mixing of CeO2–ZrO2 and H-Beta is studied in details. It was shown, that individual standard SCR activities of CeO2–ZrO2 and H-Beta are negligible, while their mixing results in the significant improvement of NOx conversion. The absence of standard SCR activity of individual components enabled us to estimate the contribution of fast SCR, NO and NH3 oxidation reactions to the overall process on CombiCat. Comparison of catalytic data obtained for layered configurations and CombiCats with various CeO2–ZrO2/H-Beta ratios also allowed us to determine the rate-limiting step and role of each component in the process.
previous article A System Simulation Study of the Enhanced-SCR Reaction
next article Clarification of NH3 Formation Mechanism on a Diesel Engine NOx Storage Reduction Catalyst Under Rich Conditions and Evaluation of the SCR Benefit at WLTC

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Metadata
Title
New Insights into the Mechanism of Synergistic Effect for [CeO2–ZrO2 + H-Beta] CombiCat in NH3–SCR
Authors
Alina I. Mytareva
Alexander Yu. Stakheev
Galina N. Baeva
Dmitriy A. Bokarev
Arkady L. Kustov
Joakim R. Thøgersen
Publication date
03-05-2016
Publisher
Springer US
Published in
Topics in Catalysis / Issue 10-12/2016
Print ISSN: 1022-5528
Electronic ISSN: 1572-9028
DOI
https://doi.org/10.1007/s11244-016-0569-z

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