The Effect of a Changing Lean Gas Composition on the Ability of NO2 Formation and NOx Reduction over Supported Pt Catalysts |
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| Authors: | Louise Olsson Miroslawa Abul-Milh Hanna Karlsson Edward Jobson Peter Thormählen and Andreas Hinz |
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| Affiliation: | (1) Competence Centre for Catalysis, Chalmers University of Technology, SE-412 96 Göteborg, Sweden;(2) Dept. 06130, Volvo Technology Corporation, SE-405 08 Göteborg, Sweden |
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| Abstract: | Three model catalysts (Pt/Al2O3, Pt/TiO2, Pt/V2O5/TiO2) were examined in regard to their NO2 formation ability under a changing lean gas composition. The results show that the NO to NO2 oxidation function as well as the NO
x
reduction under lean gas conditions is affected by a change in the lean gas atmosphere. The NO oxidation activity also decreased with time, for Pt/Al2O3 and Pt/TiO2, and a possible explanation may be platinum oxide formation. This deactivation was not observed for Pt/V2O5/TiO2. |
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| Keywords: | Pt/Al2O3 Pt/TiO2 Pt/V2O5/TiO2 oxidation NO NO
x
NO2 lean burn conditions platinum oxides |
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