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Influence of catalyst support geometry and wall thickness on NO x trap desulfation: rich/lean wobbling strategies and hexagonal cell supports for high SO2 selectivity during desulfation

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Abstract

This Synthetic Gas Bench (SGB) study focuses on the effect of cell geometry and wall thickness on the gasoline NO x trap functionality. The data show that besides a NO x trap efficiency improvement, hexagonal cells increase the sulfur resistance of the NO x trap. This feature is explained by the different wash-coat distributions in the hexagonal channels compared to square ones. The effect of lean/rich fast switching (wobbling) during desulfation was investigated and the SO2/H2S selectivity was studied: the combination of hexagonal cells and a wobbling desulfation strategy improves the H2S/SO2 selectivity by reducing the amount of H2S formed.

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Authors and Affiliations

  1. PSA Peugeot Citroën, Carburants, Emissions, Dépollution – Centre technique de La Garenne-Colombes, 18, rue des Fauvelles, 92256, La Garenne-Colombes, France

    Alain Sassi, Rémi Noirot, Christine Rigaudeau & Gérard Belot

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  1. Alain Sassi
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  2. Rémi Noirot
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  3. Christine Rigaudeau
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  4. Gérard Belot
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Sassi, A., Noirot, R., Rigaudeau, C. et al. Influence of catalyst support geometry and wall thickness on NO x trap desulfation: rich/lean wobbling strategies and hexagonal cell supports for high SO2 selectivity during desulfation. Topics in Catalysis 30, 267–272 (2004). https://doi.org/10.1023/B:TOCA.0000029761.68907.96

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  • DOI: https://doi.org/10.1023/B:TOCA.0000029761.68907.96

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