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以粘土为载体,锰铈复合氧化物作为活性组分,采用浸渍法和共混法制备了类蜂窝状Mn-Ce/粘土催化剂,研究了制备方法、煅烧温度和活性组分担载量对催化剂矿相组成、抗压强度和低温选择催化还原NO性能的影响。结果表明,两种方法所得催化剂的活性组分均为无定型态,粘土基催化剂的抗压强度明显高于TiO2基催化剂。此外,相同担载量条件下浸渍法所得催化剂的脱硝活性和机械强度均高于共混法,活性组分担载量的提高有利于催化剂活性的提高,Mn-Ce担载量为30%,催化剂在150~200℃时活性最高,脱硝率能高于90%。
Clay-like support and manganese-cerium composite oxide were used as active components. The honeycomb Mn-Ce / clay catalyst was prepared by impregnation method and blending method. The effects of preparation method, calcination temperature and active component loading on catalyst ore Phase composition, compressive strength and low temperature selective catalytic reduction of NO performance. The results show that the active components of the catalysts obtained by the two methods are all amorphous, and the compressive strength of clay-based catalysts is obviously higher than that of TiO2-based catalysts. In addition, the denitrification activity and mechanical strength of the catalyst obtained by the impregnation method under the same loading conditions are higher than the blending method, the increase of the active component loading is conducive to the improvement of the catalyst activity, the Mn-Ce loading of 30%, the catalyst The highest activity at 150 ~ 200 ℃, the denitration rate can be higher than 90%.