抄録
The catalytic reduction of NO with NH3 (NO+NH3+ (1/4) O2→N2+ (3/2) H2O) and the effect of SOx and H2O over V2O5, WO3, MoO3, SnO2, Cr2O3, Fe2 (SO4) 3 or Pt supported on TiO2 (anatase structure) were strudied by using a flow reactor at 250-500°C. Inlet gas concentration was 470 or 500 ppm NO-0 or 30 ppm NO2-0-1000 ppm NH3-0-10% O2-0 or 1000 ppm SO2-0 or 10% H2O-N2 dalanced and the space velocity was 4×104-1.33×105 hr-1 (mainly 8×104 hr-1). The catalysts consisting of V2O5-TiO2 were found to be highly active and stable doth in the presence and in the absence of SOx and H2O at above ca. 250°C Furthermore, it was proved that the addition of WO3 to V2O5-TIO2 catalysts (for example, 2.5% V2O5-7.5% WO3-TiO2) increase the activity, stability and selectivity for NO reduction at above ca. 350°C.
