Influence of the preparation method on the performance of CeO2-MoO3 catalyst for the selective catalytic reduction of NO with NH3

摘要

CeO2-MoO3 catalysts were prepared by three methods: single step sol-gel, homogeneous precipitation, hydrothermal. These catalysts were used for the selective catalytic reduction of NO with NH3 in the temperature range from 150 to 400 °C. The tested results suggested that the catalyst prepared by the hydrothermal method showed the higher NO conversion. The BET, XRD, H2-TPR, NH3-TPD and in situ DRIFTS characterization results indicated that the larger surface area, highly dispersed nanoctrystalline ceria, good redox ability and the stronger adsorption capacity for the NH3 should be the key factors to acquire the better NH3-SCR performance.