Removals of fly ash and NO in a fluidized-bed reactor with CuO/activated carbon catalysts.

Abstract This study investigates the effects of fly ash compositions (SiO 2 and Al 2 O 3 ), particle sizes (4–10 μm and 40 μm), and concentrations on the simultaneous removals of fly ash and NO using a fluidized-bed catalyst reactor. Experimental results show that the removal efficiencies of fly ash and NO at particle concentrations of 968–11,181 mg m −3 are 71–97% and 42–57%, respectively. SiO 2 particles have more influences than Al 2 O 3 particles on the performances of fluidized-bed CuO/AC catalyst. As the concentration of fine particle increases, the pores and active sites on catalyst surface are obstructed and therefore the activities of catalysts are depressed.