Hydrothermally Stable Fe–W–Ti SCR Catalysts Prepared by Deposition–Precipitation

Siva Sankar Reddy Putluru, Leonhard Schill, Susanne Mossin, Anker Degn Jensen, Rasmus Fehrmann

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Fe/TiO2 based catalysts were prepared by incipient wetness impregnation and deposition–precipitation (DP). The catalysts were characterized by activity measurements, N2 physisorption, X-ray powder diffraction, electron paramagnetic resonance spectroscopy, energy dispersive X-ray spectroscopy, H2-temperature programmed reduction and NH3-temperature programmed desorption. The 3 wt% Fe–10 wt% WO3/TiO2 (3Fe–10WTi-DP) catalyst prepared by DP using ammonium carbamate as a precipitating agent was found to be the most active and hydrothermally stable with 11 vol% H2O in air at 650 °C for 3 h. The hydrothermal stability of the catalyst can be attributed to the retained crystal structure, and mild change in acidic and redox properties of the catalyst. Furthermore, hydrothermal stability of the 3Fe–10WTi-DP catalyst is competitive with that of 3Fe–ZSM-5 and much better than 3V2O5–10WO3–TiO2 catalysts.Relative SCR activity of catalysts at 450 °C.
Original languageEnglish
JournalCATALYSIS LETTERS
Volume144
Issue number7
Pages (from-to)1170-1177
ISSN1011-372X
DOIs
Publication statusPublished - 2014

Keywords

  • HASH(0x443d6a8)
  • SCR of NO with NH3
  • Fe
  • Hydrothermal
  • Deposition–precipitation

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