Low-temperature SCR of NO with NH3 over AC/C supported manganese-based monolithic catalysts

摘要

Metal oxide/active carbon/ceramic(MO_x/AC/C)monolithic catalysts were prepared by impregnation method for selective catalytic reduction(SCR)of NO_x with NH3 at low-temperature,and they also had been characterized by elemental analysis,N2-BET,XRD,SEM and NO-TPD.The adsorption capability of the monolithic catalyst was greatly enhanced due to the attached active carbon.An ultrasonic treatment was used to improve the impregnation process,and which can increase their catalytic activities.More than 90% NO_x conversion could be achieved over the Mn-based monolithic catalysts at low-temperature,and which could be improved further by doping Ce,from 30% to 78% at 100 deg C.Mn-Fe-Ce and Mn-V-Ce monolithic catalysts had better tolerance to S02 than Mn or Mn-Ce monolithic catalysts.