Surface properties and reactivity of Cu/γ-Al2O3 catalysts for NO reduction by C3H6: Influences of calcination temperatures and additives

摘要: Abstract The influences of calcination temperatures and additives for 10 wt.% Cu/γ-Al 2 O 3 catalysts on the surface properties reactivity NO reduction by C H 6 in presence excess oxygen were investigated. results XRD XPS show that calcined below 973 K possess highly dispersed bulk CuO phases. Mn–10 wt.% at 1073 K a CuAl 4 phase with spinel-type structure. In addition, La–10 wt.% catalyst possesses phase. result shows is more active than However, significantly lower 1073 K, although these same low attributed to formation less high aggregation preferential promotion combustion CO x MnO . engine dynamometer test effective reducing agent 5 OH. maximum reached when NO/C ratio one.