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Simultaneous Removal of Soot and NOx Over Silver and Ruthenium-Based Catalysts

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Abstract

Silver- and ruthenium-based materials are herein investigated for the simultaneous removal of particulate matter (soot) and NOx and their behaviour is compared with that of a model Pt–Ba/Al2O3 catalyst. The catalytic activity for diesel soot combustion, in loose contact conditions, is studied by means of TPO (temperature programmed oxidation) while NOx removal is investigated through NOx Storage-Reduction cycles (SRC), performed both in the presence and in the absence of soot. Both the Ag- and Ru-based formulations result active in the soot oxidation, more than the traditional Pt-containing DPNR catalyst. Also, the Ru-based sample shows remarkable performances in the DeNOx-DeSoot activity, although its activity in the reduction step of the stored NOx still needs further improvements.

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Acknowledgments

The authors thank financial support from MIUR (Futuro in ricerca, FIRB 2012, Project SOLYST).

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Authors and Affiliations

  1. Dipartimento di Energia, Politecnico di Milano, Via La Masa 34, 20156, Milan, Italy

    Lidia Castoldi, Roberto Matarrese, Rossella Bonzi & Luca Lietti

  2. Università di Udine, DCFA, Via Cotonificio 108, 33100, Udine, Italy

    Eleonora Aneggi & Alessandro Trovarelli

Authors
  1. Lidia Castoldi
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  2. Eleonora Aneggi
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  3. Roberto Matarrese
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  4. Rossella Bonzi
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  5. Alessandro Trovarelli
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  6. Luca Lietti
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Correspondence to Luca Lietti.

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Castoldi, L., Aneggi, E., Matarrese, R. et al. Simultaneous Removal of Soot and NOx Over Silver and Ruthenium-Based Catalysts. Top Catal 60, 209–213 (2017). https://doi.org/10.1007/s11244-016-0599-6

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  • DOI: https://doi.org/10.1007/s11244-016-0599-6

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