NOx-reductive Perovskite catalysts for lean-burn engines
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In the present work Pd- and Rh- integrated perovskites are developed and characterized regarding the state of Pd and catalytic activity by means of microstructural and spectroscopic methods (XRD, SEM, TEM, XPS, and -SCR-NOx). Pd in the La- based perovskite partially displays a reversible diffusion mechanism under redox atmospheres at 600° C. These effects produce a self-regenerative mechanism at relatively high temperatures. Catalytic testing under model gas mixtures of powders and coatings of these perovskites proves the potential of these materials for effective NOx-reduction under lean conditions. Hydrogen provides the best NO- reduction results among the employed reducing agents (i.e. H2, C3H6, and C8H18). The Pd-integrated Perovskites display peak NO-conversions of 72 % and N2-selectivities of 72 % in the presence of H2O- vapour and CO2 at temperatures below 300°C. For instance, Ba- and Ce- substituted perovskites are also active for NO-reduction up to 400°C.
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GarantieWeitere Informationen
- Allgemeine Informationen
- Sprache Englisch
- Herausgeber Südwestdeutscher Verlag für Hochschulschriften AG Co. KG
- Gewicht 262g
- Untertitel Development and characterization of NOx-reductive catalytic coating systems for lean-burn engines
- Autor Guillermo César Mondragón Rodríguez
- Titel NOx-reductive Perovskite catalysts for lean-burn engines
- Veröffentlichung 12.10.2015
- ISBN 3838111826
- Format Kartonierter Einband
- EAN 9783838111827
- Jahr 2015
- Größe H220mm x B150mm x T11mm
- Anzahl Seiten 164
- GTIN 09783838111827
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