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以成型TiO2作为载体,通过浸渍法制备了Mn-Ce/TiO2低温SCR催化剂,并系统研究了制备方法、煅烧条件、活性组分担载量、Mn含量等参数对催化剂催化还原NO性能的影响。结果表明,煅烧温度的升高会促使活性组分结晶度的提高,从而引起催化活性的降低,在500℃和600℃下所得Mn-Ce/TiO2催化剂活性组分为无定型态,表现出较高的脱硝活性。活性组分担载量的增加有利于催化活性的提高。Mn含量对Mn-Ce/TiO2催化剂的活性有较大影响,当Mn/(Mn+Ce)摩尔比为40%和85%时,催化剂活性最高。
The low temperature SCR catalyst Mn-Ce / TiO2 was prepared by impregnation method with TiO2 as carrier. The effects of preparation method, calcination conditions, active component loading, Mn content and other parameters on catalytic reduction of NO were investigated systematically. The results show that the calcination temperature will promote the increase of the crystallinity of the active component, which will lead to the decrease of the catalytic activity. The active components of Mn-Ce / TiO2 catalyst obtained at 500 ℃ and 600 ℃ are amorphous state, High denitration activity. The increase of the loading of active ingredients is conducive to the increase of catalytic activity. The Mn content has a great influence on the activity of Mn-Ce / TiO2 catalyst, and the catalyst activity is the highest when the molar ratio of Mn / (Mn + Ce) is 40% and 85%.