【摘要】 为了去除选择性催化还原脱硝过程中产生的逃逸氨，采用溶胶凝胶法和浸渍法分别制备出Mn/TiO₂催化剂，并使用该催化剂将NH₃氧化成氮气和水，而后分析了催化剂的制备方法、Mn负载量及焙烧温度在其催化氧化氨时对氨转化率的影响，并利用BET,XRD等表征手段探究了氨转化率改变的原因.结果表明：以溶胶凝胶法制备催化剂的氨转化率明显高于以浸渍法制备催化剂的氨转化率，这是因为采用溶胶凝胶法制备的催化剂表面光滑，负载物质分布均匀；随着催化剂活性组分Mn负载量及焙烧温度的增加，氨转化率呈先升高后降低的趋势；当催化剂Mn负载量为0.2、焙烧温度为400℃时，催化剂的比表面积最大，氨转化率可达到97%.更多还原

【Abstract】 In order to remove the escaping ammonia generated during selective catalytic reduction denitrification, the Mn/TiO₂ catalysts were prepared by sol-gel method and impregnation method, so that NH₃ was oxidized into nitrogen and water under the action of the catalyst. Then the effects of the catalyst preparation method, Mn loading, and calcination temperature on the ammonia conversion rate of the catalyst were analyzed, and the reasons for the change of ammonia conversion were explored by characterization methods such as BET and XRD. The results show that the ammonia conversion rate of the catalyst prepared by sol-gel method is higher than that of impregnation method, because the catalyst surface prepared by the sol-gel method is smooth and the load material is evenly distributed. With the increase of the Mn loading amount and calcination temperature of the active component, the ammonia conversion rate of the catalyst first increases and then decreases. When the load is 0.2 and the calcination temperature is 400 ℃, the catalyst has the biggest S_BET, the ammonia conversion rate can reach 97%.更多还原