催化作用
氮氧化物
无定形固体
选择性催化还原
化学
氨
吸附
无机化学
相(物质)
氧化锰
化学工程
材料科学
有机化学
燃烧
工程类
作者
Xiaolong Tang,Jiming Hao,Wei Xu,Junhua Li
标识
DOI:10.1016/j.catcom.2006.06.025
摘要
Unsupported manganese oxide catalysts with amorphous phase were prepared by three methods, and their activities for SCR of NOx with ammonia were investigated in the presence of O2. The results showed the catalysts have superior low temperature activity, and the NOx conversion is about 98% at 80 °C, and nearly 100% NOx conversion between 100 and 150 °C. Due to competing adsorption with the reactant, H2O has slight impact on the activity. The activity was suppressed with coexisting of SO2, however the deactivation of SO2 is reversible. The excellent low temperature catalytic activity of amorphous MnOx catalysts is mainly due to their amorphous phase and high specific areas.
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