北京化工大学硕士学位论文左右,N2选择性在90%以上,且具有良好的抗H20和S02性能。通过表征发现,M003在M/1Zr上高度均匀分散,在中高温下具有很强的氧化还原能力。DRIFTS分析表明M003的添加增强了催化剂的酸性,继而有利于反应物NH3的吸附于活化,产生更多的活性氨物种,同时抑制了硝酸盐物种在催化剂表面的生成,加速了NH3一SCR反应的进行,从而提高了催化剂的脱硝性能。关键词:氮氧化物,选择性催化还原,球状MnCeOx,M003/MnZrⅡ万方数据ABSTRACTSTUDYoNTHENOxREMOVALOVERMANGANESE-BASEDCATALYSTSABSTRACTDeNOxcatalystplaysanimportantroleintheselectivecatalyticreductionofNOxbyNI-13(/Ⅲ-13一SCR)andMn—basedcatalystsshowanexcellentNI-,,whichdemonstratedtobeactivefortheNH3一SCRofNOx,,XRD,,-200℃,nearly100%,theNOxconversionWasaround90%.Moreover,,itwasfoundthatspherical9MnlCecatalysthadhighspecificsurfacearea,.BoththeNOxconversionandtheselectivitytoN2inthetemperaturerangeof250—400。Careover90%,whichcontributestotheadsorptionandactivationofNH3,butalsoinhabitedthenitratespeciesgeneratedonthesurfaceofthecatalyst,thuspromot
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