作　　者： ; ; ; ; ;

机构地区： 广西大学化学化工学院

出　　处： 《化工进展》 2013年第11期2655-2660,共6页

摘　　要： 以经过硝酸改性后的活性炭纤维(ACFN)为载体,采用等体积浸渍法制备了MnOx/ACFN催化剂。测试了其在以氨气为还原剂的低温选择性催化还原(SCR)过程中的催化活性,并考察了活性组分MnOx的负载量、金属氧化物CeO2的复合负载方法及负载量对催化剂脱硝活性的影响。同时运用XRD和SEM对催化剂理化特性进行表征。结果表明,采用共沉淀法添加CeO2、总负载量为15%、且铈与锰的物质的量比为3∶2、反应温度为200℃时,催化剂的活性最高,对NOx的去除率达到92.2%。 Manganese catalysy supported on activated carbon fibers modified by nitric acid （MnOx/ACFN） was prepared by the method of impregnation. The activity of MnOx/ACFN catalyst was tested for selective catalytic reduction （SCR） of NO with ammonia at low-temperature. The effects of manganese content and the methods and content of cerium loading for improving the denitration activity of MnOx/ACFN catalyst were investigated. The physical and chemical characteristics of these catalysts were studied with X-ray diffraction （XRD） and scanning electron microscope （SEM）. The most active catalyst with the highest conversion of NOx of 92.2% was prepared under the conditions of adding CeO2 by co-precipitation,total loading of MnOx and CeO2 15%,molar ratio of cerium to manganese 3∶2,reaction temperature 200 ℃.

关 键 词： 氮氧化物 锰氧化物 二氧化铈 活性碳纤维 选择性催化还原

领　　域： [环境科学与工程]