MnFe/Al2O3 Catalyst Synthesized by Deposition Precipitation for Low-Temperature Selective Catalytic Reduction of NO with NH3

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

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Abstract

Mn-Fe/Al2O3 and Mn-Fe/TiO2 catalysts have been prepared by impregnation (IMP) and deposition precipitation (DP) and characterized with several techniques including: XRDP, N2-physisorption, NH3-TPD, H2-TPR, TGA and XPS. 40 wt% Mn0.75Fe0.25/Al2O3 prepared with ammonia carbamate as precipitating agent showed the same superior low temperature selective catalytic reduction of NO with NH3 as did 25 wt% Mn0.75Fe0.25/TiO2 prepared in the same way. Both catalysts were much more active when prepared by DP instead of IMP. 25 wt% Mn0.75Fe0.25/TiO2 and 40 wt% Mn0.75Fe0.25/Al2O3 prepared by DP were exposed to a gas containing 20 vol% H2O at temperatures between 140 and 200 A degrees C and compared to an industrial V2O5-WO3/TiO2 catalyst tested at 220 °C. Both homemade catalysts were severely inhibited by 20 vol% H2O. However, used at 180 °C they match the activity of the industrial reference at 220 °C.
Original languageEnglish
JournalCATALYSIS LETTERS
Volume145
Issue number9
Pages (from-to)1724-1732
Number of pages9
ISSN1011-372X
DOIs
Publication statusPublished - 2015

Keywords

  • Catalysis
  • Industrial Chemistry/Chemical Engineering
  • Organometallic Chemistry
  • Physical Chemistry

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