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- Title
Hydrothermally Stable Fe-W-Ti SCR Catalysts Prepared by Deposition-Precipitation.
- Authors
Putluru, Siva; Schill, Leonhard; Mossin, Susanne; Jensen, Anker; Fehrmann, Rasmus
- Abstract
Fe/TiO based catalysts were prepared by incipient wetness impregnation and deposition-precipitation (DP). The catalysts were characterized by activity measurements, N physisorption, X-ray powder diffraction, electron paramagnetic resonance spectroscopy, energy dispersive X-ray spectroscopy, H-temperature programmed reduction and NH-temperature programmed desorption. The 3 wt% Fe-10 wt% WO/TiO (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% HO 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 3VO-10WO-TiO catalysts. Graphical Abstract: Relative SCR activity of catalysts at 450 °C.[Figure not available: see fulltext.]
- Subjects
IRON-tungsten alloys; PHYSISORPTION; X-ray powder diffraction; PRECIPITATION (Chemistry); ELECTRON paramagnetic resonance spectroscopy; AMMONIUM carbonate
- Publication
Catalysis Letters, 2014, Vol 144, Issue 7, p1170
- ISSN
1011-372X
- Publication type
Article
- DOI
10.1007/s10562-014-1273-x