On-Filter Integration of Soot Oxidation and Selective Catalytic Reduction of NOx with NH3 by Selective Two Component Catalysts

  • Ferenc Martinovic
  • Tahrizi Andana
  • Fabio Alessandro DeorsolaEmail author
  • Samir Bensaid
  • Raffaele Pirone


A group of catalysts was developed with the purpose of enhancing the soot oxidation in the selective catalytic reduction on filter system, without negatively effecting the NOx conversion associated to NH3 oxidation. The impregnation with alkali metal of a series of supports, characterized by a lack of strong superficial acid sites, improved soot oxidation simultaneously preventing ammonia adsorption, thus its catalytic oxidation. Strong synergy was observed between a ZrO2–CeO2 support and potassium, decreasing the T50 of the soot conversion of 170 °C in loose contact. This catalyst was added to a Fe-ZSM5 selective catalytic reduction (SCR) catalyst without negative effect for the SCR activity. The complex interaction between the potassium-based soot oxidation catalyst and the SCR one was investigated. The soot–soot oxidation catalyst-SCR catalyst contact mode was found to be a key factor and the increased contact of the soot–soot oxidation catalyst is preferable. Such dual component catalyst system was demonstrated to be promising for simultaneous removal of NOx and soot on a single filter.

Graphic Abstract


SCR on filter Soot oxidation SCR Fe-ZSM5 



This work was funded through a SINCHEM Grant. SINCHEM is a Joint Doctorate programme selected under the Erasmus Mundus Action 1 Programme (FPA 2013-0037).

Supplementary material

10562_2019_3012_MOESM1_ESM.pdf (2 mb)
Supplementary material 1 (PDF 2023 kb)


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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • Ferenc Martinovic
    • 1
  • Tahrizi Andana
    • 1
  • Fabio Alessandro Deorsola
    • 1
    Email author
  • Samir Bensaid
    • 1
  • Raffaele Pirone
    • 1
  1. 1.Department of Science Applied and TechnologyPolitecnico di TorinoTurinItaly

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