摘要
采用共沉淀法制备了负载型Mn-Fe/γ-Al2O3低温SCR催化剂,运用固定床催化反应器,以氨气为还原剂,考察了负载量、活性组分配比、焙烧温度等制备条件和空速、O2体积分数、NH3/NO摩尔比等操作条件对Mn-Fe/γ-Al2O3催化剂低温脱硝性能的影响,并通过X射线衍射仪(XRD)、比表面积测定仪(BET)等手段对催化剂进行表征。结果表明,负载质量分数为20%、n(Mn)∶n(Fe)=4∶1、焙烧温度为600℃、空速为16000h-1、O2体积分数为4%、NH3/NO摩尔比为1.2、反应温度为200℃的条件下,NO转化率达到了96%以上。
Low-temperature denitration catalyst Mn-Fe/γ-Al2O3 was prepared by the co-precipitation method. The performance of the catalysts for SCR reaction was evaluated with ammonia gas as the reductant in a fixed bed catalyst reactor. The effects of loading,active component ratio,calcination temperature,space velocity,oxygen content and mole ratio of NH3/NO on the catalysts＇ performance at low temperature were examined. The catalysts were characterized by XRD and BET techniques. The result showed that NO conversion over the catalyst could be above 96% at 200℃ when the conditions of the metal loading of 20%,molar ratio of Mn/Fe 4∶1,space velocity of 16000h-1,oxygen content of 4%,and mole NH3/NO ratio of 1.2,were adopted.
出处
《化工进展》
EI
CAS
CSCD
北大核心
2016年第4期1107-1112,共6页
Chemical Industry and Engineering Progress
关键词
制备
催化剂
选择性催化还原
低温
活性
preparation
catalyst
selective catalytic reduction
low temperature
reactivity
