Low-temperature SCR of NO with NH₃ over AC/C supported manganese-based monolithic catalysts

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• 作者：Xiaolong Tang ; Jiming Hao ; Honghong Yi ; Junhua Li
• 关键词：Monolithic catalyst ; Active carbon ; NO_x ; Ammonia ; SCR ; Low-temperature
• 刊名：Catalysis Today
• 出版年：2007
• 期刊代码：13_09205861
• 类别：ce
• 出版时间：30 August 2007
• 卷：126
• 期：3-4
• 页码：406-411
• 文件大小：885 K

摘要

Metal oxide/active carbon/ceramic (MO_x/AC/C) monolithic catalysts were prepared by impregnation method for selective catalytic reduction (SCR) of NO_x with NH₃ at low-temperature, and they also had been characterized by elemental analysis, N₂-BET, XRD, SEM and NO-TPD. The adsorption capability of the monolithic catalyst was greatly enhanced due to the attached active carbon. An ultrasonic treatment was used to improve the impregnation process, and which can increase their catalytic activities. More than 90%NO_x conversion could be achieved over the Mn-based monolithic catalysts at low-temperature, and which could be improved further by doping Ce, from 30%to 78%at 100 °C. Mn–Fe–Ce and Mn–V–Ce monolithic catalysts had better tolerance to SO₂ than Mn or Mn–Ce monolithic catalysts.