NO reduction by CO over automotive exhaust gas catalysts in the presence of O2 |
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| Authors: | J.M.A. Harmsen J.H.B.J. Hoebink J.C. Schouten |
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| Affiliation: | (1) Laboratory of Chemical Reactor Engineering, Schuit Institute of Catalysis, Eindhoven University of Technology, PO Box 513, 5600 MB Eindhoven, The Netherlands |
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| Abstract: | The reduction of NO by CO in absence and presence of O2 has been investigated by transient experiments at automotive cold-start conditions over Pt/Rh/CeO2/ -Al2O3, and derived model catalysts. A high-resolution magnetic sector mass spectrometer was used for distinguishing CO/N2 and CO2/N2O. Mechanistic comparisons are made between the catalyst formulations. A kinetic scheme of elementary reaction steps is proposed, which highlights the various contributions of the catalyst constituents. |
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| Keywords: | NO reduction automotive exhaust platinum rhodium ceria lean elementary steps modelling |
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