复合氧化物催化材料上碳颗粒物的催化燃烧

Catalytic Combustion of Soot on Combined Oxide Catalysts

针对柴油车排放碳颗粒物的控制 ,研制可应用于柴油车排放碳颗粒物催化再生复合氧化物催化材料 .通过运用热分析仪 (TGA)和程序升温氧化反应装置 (TPO)对复合氧化物催化材料的活性进行评价 ,研究了催化材料的组成、原子配比、催化材料与碳颗粒物质量比、H2 O的加入、焙烧温度对催化活性的影响 .实验结果表明 :双组分金属氧化物催化剂中 ,Cu Mo O有较好的活性 ;多组分金属氧化物催化剂中 ,Cu K Mo O在原子比Cu∶K∶Mo =1∶1∶2 ,催化剂与碳颗粒物质量比为 5∶1时活性最好 ,其碳颗粒物起燃温度为 32 7℃ ,同时H2 O和焙烧温度对该催化剂的影响较小 ,是能够应用于柴油车排放碳颗粒物控制催化再生的良好催化材料 .

Combined oxide catalysts are prepared for catalytic combustion of soot and regeneration from diesel emissions.Thermogravimetric analysis(TGA) and temperature programmed oxidation(TPO)are used to evaluate the activity of catalysts under the influence of composition,atomic ration,H 2O,calcinations temperature and mass ration between catalysts and soot.Results show that Cu-Mo-O had high activity among double metal oxide catalysts.Among multicomponent metal oxide catalysts,Cu-K-Mo-O had high activity when atomic ratio Cu∶K∶Mo=1∶1∶2 and mass ration between catalysts and soot equals 5∶1.Under this condition,soot ignition temperature of Cu-K-Mo-O catalyst was 327℃.H 2O addition and calcinations temperature had little influence on it,which is one kind of compatible catalyst for soot control and catalytic regeneration from diesel emissions.