焙烧温度对镍锰钛氧化物选择催化还原NO活性的影响

Calcination temperature on the catalytic reduction NO activity of nickel-manganese-titanium oxide

通过XRD、H_2-TPR、NH_3-_TPD和N_2吸附-脱附等分析测试手段,研究了不同焙烧温度对镍锰钛氧化物选择催化还原NO活性的影响。研究发现催化剂Ni_(0.4)Mn_(0.6)Ti_(10)-500℃的NH_3选择催化还原NO的活性最好,其可能原因是500℃焙烧有利于催化剂Ni_(0.4)Mn_(0.6)Ti_(10)-500℃具有较大的比表面积、较小的平均孔径、适宜的氧化还原能力及表面大量的酸性位,而这些都有利于低温条件下NH_3催化还原NO。

Nickel-manganese-titanium oxides were studied for selective catalytic reduction of NO by XRD,H2-TPR,NH3-TPD and N2 adsorption-desorption. The study found that the catalyst Ni（0.4）Mn（0.6）Ti（10）-500 ℃ showed the best SCR activity,the reasons may be as follows： Ni（0.4）Mn（0.6）Ti（10）-500 ℃ catalyst showed a larger specific surface area,the smaller average pore diameter,appropriate redox ability and the surface of a large number of acidic,that these are conducive to NH3 under the condition of low temperature catalytic reduction of NO.