(Fe2Ti0.5V0.5)1-δO4was synthesized using a co-precipitation method and then developed as acatalyst for the selective catalytic reduction (SCR) of NO with NH3. In situ DRIFTS study suggested that theSCR reaction over (Fe2Ti0.5V0.5)1-δO4mainly followed the Eley-Rideal mechanism (i.e. the reaction betweenactivated ammonia and gaseous NO). At lower temperatures, adsrobed ammonia mainly actviated by V5+on(Fe2Ti0.5V0.5)1-δO4. However, adsrobed ammonia mainly actviated by Fe3+on (Fe2Ti0.5V0.5)1-δO4at highertemperatures. Therefore, (Fe2Ti0.5V0.5)1-δO4showed excellent activity, selectivity, and H2O/SO2durability forthe SCR reaction at 250-400oC, which was much better than those of (Fe2.5Ti0.5)1-δO4, (Fe2Ti0.5Mn0.5)1-δO4and V2O5-WO3/TiO2. Meanwhile, the emission of (Fe2Ti0.5V0.5)1-δO4to the environment can be effectivelyprevented by an external magnetic field due to its inherent magnetization. (Fe2Ti0.5V0.5)1-δO4could be apromising catalyst to substitute conventional vandium based catalyst for the practical application in thecontrol of NOxemission especially from industrial furnace.
展开▼
