Journal article
Superior DeNOx activity of V2O5–WO3/TiO2 catalysts prepared by deposition–precipitation method
Department of Chemistry, Technical University of Denmark1
Centre for Catalysis and Sustainable Chemistry, Department of Chemistry, Technical University of Denmark2
Department of Chemical and Biochemical Engineering, Technical University of Denmark3
CHEC Research Centre, Department of Chemical and Biochemical Engineering, Technical University of Denmark4
Center for Electron Nanoscopy, Technical University of Denmark5
V2O5–WO3/TiO2 catalysts were prepared by incipient wetness impregnation and deposition–precipitation (DP) methods. The catalysts were characterized by N2 physisorption, X-ray powder diffraction, Fourier transform infra red spectroscopy, electron paramagnetic resonance spectroscopy, transmission electron microscopy, H2-temperature programmed reduction and NH3-temperature programmed desorption.
The catalysts exhibited only crystalline TiO2 phases with the active metal and promoter in highly dispersed or amorphous state. The 3 wt% V2O5–10 wt% WO3/TiO2 catalyst prepared by DP using ammonium carbamate as a precipitating agent was found to be the most active and selective to N2. The superior activity of the catalyst can be ascribed to the altered acidic and redox properties of vanadium.
The catalysts did not show increased potassium resistance with the change in preparation method or with increasing vanadium concentration. Furthermore, potassium-poisoned catalysts showed above stoichiometric loss of surface acidity. Thus, these modified formulations are suggested to be used in coal/natural gas-fired power plants where there is a demand for high selective catalytic reduction activity and selectivity to N2.
| Language: | English |
|---|---|
| Publisher: | Springer US |
| Year: | 2014 |
| Pages: | 2705-2713 |
| Journal subtitle: | Full Set - Includes `journal of Materials Science Letters' |
| ISSN: | 15734803 and 00222461 |
| Types: | Journal article |
| DOI: | 10.1007/s10853-013-7926-0 |
| ORCIDs: | Putluru, Siva Sankar Reddy , Schill, Leonhard , Gardini, Diego , Mossin, Susanne , Wagner, Jakob Birkedal , Jensen, Anker Degn and Fehrmann, Rasmus |
Characterization and Evaluation of Materials Chemistry and Materials Science Continuum Mechanics and Mechanics of Materials Crystallography Electron Paramagnetic Resonance Spectrum Incipient Wetness Impregnation Material Science Materials Science, general Mechanics Polymer Sciences Selective Catalytic Reduction Selective Catalytic Reduction Catalyst V2O5
