Activity of mesoporous-MnO_x (m-MnO_x) and CuO/m-MnO_x for catalytic reduction of NO with CO

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• 作者：Archana Patel ; Pradeep Shukla ; Jiuling Chen ; Thomas E. Rufford ; Victor Rudolph ; Zhonghua Zhu
• 关键词：Manganese oxide ; Copper oxide ; Selective catalytic reduction ; Nitric oxide ; CO oxidation
• 刊名：Catalysis Today
• 出版年：2013
• 出版时间：1 September, 2013
• 年：2013
• 卷：212
• 期：Complete
• 页码：38-44
• 全文大小：1132 K

文摘

The direct reduction of NO over mesoporous manganese oxide (m-MnO_x) and in the presence of CO was studied at reaction temperatures in the range from 150 to 460 ¡ãC. The conversion of NO without the reducing agent CO was limited to less than 10 % , but when CO was added to the reactor feed up to 70 % of the NO was reduced at a reaction temperature of 340 ¡ãC. However, the m-MnO_x catalyst activity deteriorated at temperature above 340 ¡ãC due to a transformation of MnO₂ to the less active Mn₂O₃ and Mn₃O₄ phases. The activity of the m-MnO_x catalyst at high temperatures was enhanced by the addition of CuO. Two methods to load CuO on the m-MnO_x were investigated: wet impregnation and co-precipitation. Both methods produced catalysts that achieved close to 97 % NO conversion in CO at a reaction temperature of 430 ¡ãC.