Performance of M( 0. 1) Mn( 15) /Hβ catalysts for the selective catalytic reduction of NO with NH_3 at low temperature

NH3-selective catalytic reduction( NH3-SCR) can effectively reduce emissions of NOx from stationary sources. Current commercial V-Ti system catalysts which possess the active temperature range( 300-400) ℃ cant be used in low temperature DeNOx. Developing catalysts using in flue gas DeNOxat low temperature has become a hotspot. M( 0. 1) Mn( 15) / Hβ catalysts( M = Ni,Fe,Mg,Ca,Sr,M / Mn molar ratio = 0. 1) were prepared by impregnation method. The catalysts were characterized by XRD,SEM and H2-TPR. The catalytic activity of the catalysts for selective catalytic reduction of nitrogen oxide with NH3was investigated in a micro-reactor. The results showed that Ni( 0. 1) Mn( 15) / Hβ catalyst has the best activity and the reaction temperature decreased. T85and T95were 157 ℃ and 171 ℃,respectively.