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Topics in Catalysis

, Volume 30, Issue 1–4, pp 293–298 | Cite as

Development of monolithic catalysts with low noble metal content for diesel vehicle emission control

  • S. A. Yashnik
  • V. V. Kuznetsov
  • Z. R. Ismagilov
  • V. V. Ushakov
  • N. M. Danchenko
  • S. P. Denisov
Article

Abstract

Monolith washcoated catalysts with potential for diesel emission control have been developed. Two types of catalysts have been prepared for further study: (1) MnO x supported on granulated γ-Al2O3, (2) MnO x supported on cordierite monolith washcoated with γ-Al2O3. Both catalysts have been calcined at 500 and 900 °C and subsequently modified by doping with 0.1–1.0 wt% of Pt or Pd. The influence of the concentration of both manganese oxide (0–10 wt%) and noble metals Pt and Pd in the range 0–1.0 wt% on the catalytic activity in methane oxidation has been studied. Comparison of the catalytic activity of MnO x /Al2O3 and MnO x  + Pt(Pd)/Al2O3 with that of a standard 1 wt%Pt/Al2O3 catalyst shows the existence of a synergetic effect. This effect is more pronounced for the samples calcined at 900 °C. The developed monolithic catalysts MnO x  + Pt(Pd)/Al2O3 demonstrate higher activity and thermal stability (up to 900 °C) compared to the commercial monolithic catalyst (TWC’s).

Keywords:

manganese-alumina catalyst multicomponent catalyst washcoated catalyst automotive exhaust purification diesel emission control catalytic combustion 

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Copyright information

© Plenum Publishing Corporation 2004

Authors and Affiliations

  • S. A. Yashnik
    • 1
  • V. V. Kuznetsov
    • 1
  • Z. R. Ismagilov
    • 1
  • V. V. Ushakov
    • 1
  • N. M. Danchenko
    • 2
  • S. P. Denisov
    • 2
  1. 1.Boreskov Institute of CatalysisNovosibirskRussia
  2. 2.Ural Electrochemical PlantNovouralskRussia

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