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Influence of Mn and Fe Addition on the NO x Storage–Reduction Properties and SO2 Poisoning of a Pt/Ba/Al2O3 Model Catalyst

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Abstract

This work deals with the effect of Mn or Fe addition on the NO x storage–reduction properties of a Pt/Ba/Al2O3 model catalyst. NO x storage capacity, SO2 poisoning and regeneration and NO x removal efficiency under rich/lean cycling conditions are studied. Fe addition to Pt/Ba/Al2O3 leads only to a small increase of NO x storage capacity, and more interestingly, to a better sulfur removal due to the inhibition of bulk barium sulfate formation. Unfortunately, the NO x storage property cannot be fully recovered. Moreover, Fe addition results in a decrease in the NO x removal efficiency. Mn addition also improves the NO x storage capacity, but no significant influence on the sulfur elimination is observed. Mn-doped catalyst does not improve the NO x removal efficiency, but NH3 selectivity is found to drastically decrease at 400 °C, from 20 to 3%. In addition, the NO x conversion can be improved at higher H2 concentration in the rich pulse, always keeping NH3 selectivity at low level.

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Authors and Affiliations

  1. Laboratoire de Catalyse en Chimie Organique, Université de Poitiers, UMR 6503 CNRS, 40 avenue du recteur Pineau, 86022, Poitiers cedex, France

    P. N. Lê, E. C. Corbos, X. Courtois, F. Can, S. Royer, P. Marecot & D. Duprez

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  1. P. N. Lê
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  2. E. C. Corbos
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  3. X. Courtois
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  4. F. Can
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  5. S. Royer
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  6. P. Marecot
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  7. D. Duprez
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Correspondence to X. Courtois.

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Lê, P.N., Corbos, E.C., Courtois, X. et al. Influence of Mn and Fe Addition on the NO x Storage–Reduction Properties and SO2 Poisoning of a Pt/Ba/Al2O3 Model Catalyst. Top Catal 52, 1771–1775 (2009). https://doi.org/10.1007/s11244-009-9345-7

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  • DOI: https://doi.org/10.1007/s11244-009-9345-7

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