Selective Catalytic Reduction of NO with NH3 over Wire-Mesh Honeycomb Supported V2O5 -MoO3/TiO2/Al2O3 Catalyst

A novel V₂O₅-MoO₃/TiO₂/Al₂O₃ metal wire-mesh-honeycomb catalyst prepared by electrophoretic deposition (EPD) was investigated for the selective catalytic reduction (SCR) of NO with NH₃. The effects of reaction temperature, space velocity and NH₃/NO ratio on the SCR activity were evaluated. The experimental results show that V₂O₅-MoO₃/TiO₂/Al₂O₃ catalyst can achieve satisfied NO removal effect at 350degC; the increase of the space velocity will make NO conversion ratio reduce, except 400degC. NH₃/NO ratio has a little influence on NO removal efficiency, which raises slowly with the increasing NH₃/NO ratio. At the same time, body structure and surface character of catalyst prepared were characterized by XRD, SEM and XPS. Combining characterization with the results of activity test, the relation between catalyst structure and catalysis performance was analyzed. The results of characterization show that the active component is uniformly distributed on the catalyst carrier as a single layer and high SCR activity is attributed to the strong interaction between TiO₂ and V₂O₅.