WO₃/CeO₂/TiO₂ Catalysts for Selective Catalytic Reduction of NOx by NH₃: Effect of the Synthesis Method

Authors

  • Katarzyna A. Michalow-Mauke Paul Scherrer Institute, CH-5232 Villigen, Switzerland. k.michalow.mauke@outlook.com
  • Ye Lu Lab. for Solid State Chemistry and Catalysis, Empa Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
  • Davide Ferri Paul Scherrer Institute, CH-5232 Villigen, Switzerland
  • Thomas Graule Lab. for High Performance Ceramics, Empa Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland
  • Kazimierz Kowalski Faculty of Metals Engineering & Industrial Computer Science, AGH University of Science & Technology, Al. Mickiewicza 30, PL-30059 Krakow, Poland
  • Martin Elsener Paul Scherrer Institute, CH-5232 Villigen, Switzerland
  • Oliver Kröcher Paul Scherrer Institute, CH-5232 Villigen, Institute of Chemical Sciences and Engineering, EPF Lausanne, Switzerland. oliver.kroecher@psi.ch

DOI:

https://doi.org/10.2533/chimia.2015.220

Keywords:

Flame spray synthesis, Nh3, Nox reduction, Scr, Wet impregnation

Abstract

WO3/CeO2/TiO2, CeO2/TiO2 and WO3/TiO2 catalysts were prepared by wet impregnation. CeO2/TiO2 and WO3/TiO2 showed activity towards the selective catalytic reduction (SCR) of NOx by NH3, which was significantly improved by subsequent impregnation of CeO2/TiO2 with WO3. Catalytic performance, NH3 oxidation and NH3 temperature programmed desorption of wet-impregnated WO3/CeO2/TiO2 were compared to those of a flame-made counterpart. The flame-made catalyst exhibits a peculiar arrangement of W-Ce-Ti-oxides that makes it very active for NH3-SCR. Catalysts prepared by wet impregnation with the aim to mimic the structure of the flame-made catalyst were not able to fully reproduce its activity. The differences in the catalytic performance between the investigated catalysts were related to their structural properties and the different interaction of the catalyst components.

CHIMIA Vol. 69 No. 4 (2015): Laureates: Junior Prizes, SCS Fall Meeting 2014

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Published

2015-04-29

Issue

Vol. 69 No. 4 (2015): Laureates: Junior Prizes, SCS Fall Meeting 2014

Section

Scientific Articles

License

Copyright (c) 2015 Swiss Chemical Society

Creative Commons License

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License.

How to Cite

[1]
K. A. Michalow-Mauke, Y. Lu, D. Ferri, T. Graule, K. Kowalski, M. Elsener, O. Kröcher, Chimia 2015, 69, 220, DOI: 10.2533/chimia.2015.220.