Abstract
VFe/TiO2 catalysts have been prepared using a solgel based method. Fe was introduced using 3 different methods. The resulting substances were characterized with N2-physisorption, NH3-TPD, H2-TPR, XPS and XRD. Extrudates of the VFe/TiO2 powders were prepared using sepiolite (20wt.%) as binder. The activities of the composite materials in the selective catalytic reduction (SCR) of NO with NH3 were measured at temperatures of up to 200°C and in the presence of 20vol.% H2O. Presence of Fe can increase the surface area, enhance the redox properties, increase the number of surface acid sites, increase the share of surface adsorbed oxygen and does not induce the formation of crystalline V2O5. However, the measurements performed here show that Fe doping does not cause activity enhancement of the V/TiO2.
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