Fulltext

Flame-Made Pt/K/Al2O3 for NO x Storage-Reduction (NSR) Catalysts

Büchel, Robert ; Strobel, Reto ; Baiker, Alfons ; Pratsinis, Sotiris

In: Topics in Catalysis, 2009, vol. 52, no. 13-20, p. 1799-1802

Add to personal list
    Title
    • Flame-Made Pt/K/Al2O3 for NO x Storage-Reduction (NSR) Catalysts
    Author
    • Büchel, Robert. Particle Technology Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, 8092, Zurich, Switzerland
    • Strobel, Reto. Particle Technology Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, 8092, Zurich, Switzerland
    • Baiker, Alfons. Department of Chemistry and Applied Biosciences, Institute for Chemical and Bioengineering, ETH Zurich, Wolfgang-Pauli-Strasse 10, 8093, Zurich, Switzerland
    • Pratsinis, Sotiris. Particle Technology Laboratory, Department of Mechanical and Process Engineering, ETH Zurich, Sonneggstrasse 3, 8092, Zurich, Switzerland
    Document Type
    • Postprint
    Language
    • English
    Published in
    • Topics in Catalysis, 2009, vol. 52, no. 13-20, p. 1799-1802. Springer US; http://www.springer-ny.com
    Other Version
    OAI-PMH Identifier
    • oai:doc.rero.ch:314716
    Summary
    High surface area Pt/K/Al2O3 catalysts were prepared with a 2-nozzle flame spray method resulting in Pt clusters on γ-Al2O3 and amorphous K storage material as evidenced by Raman spectroscopy. The powders had a high NO x storage capacity and were regenerated fast in a model exhaust gas environment. From 300 to 400°C no excess NO x was detected in the off gas during transition from fuel lean to fuel rich conditions, resulting in a highly effective NO x removal performance. Above 500°C, the NSR activity was lost and not recovered at lower temperatures as K-compounds were partially crystallized on the catalyst