通过浸渍法制备了8%Mn/TiO_2-PILC以及稀土元素R（Ce,La）改性的8%Mn-2%R/TiO_2-PILC催化剂,考察了所制备催化剂的低温NH_3-SCR活性和抗水抗硫特性。结果发现,Ce的添加改变了催化剂的物相以及氧化还原特性,从而改变了催化剂的NO去除活性;稀土元素的添加可以减缓催化剂的失活速率,但是抗水抗硫特性仍然不理想。
8%Mn/Titania-pillared clays（8%Mn/TiO_2-PILC） and rare earth modified catalysts 8%Mn-2%R/TiO_2-PILC were prepared by the impregnation method for the low-temperature selective catalytic reduction（SCR） of NO with NH_3,their resistance to water vapor and sulfur dioxide.It was found that the addition of rare earth would change the phy-chemstry properties of 8%Mn/TiO_2-PILC and inhence inprove the NO conversion.The addition of rare earth,especially Ce,suppresses the deactivation to a degree although the SO_2 resistances of the catalysts are weak.
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