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化工进展  2015 

整体式Mn基低温脱硝催化剂研究

, PP. 127-130

Keywords: 低温,脱硝,堇青石蜂窝陶瓷基体,

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Abstract:

采样硝酸锰和乙酸锰两种Mn的前体制备以堇青石为基体的整体式脱硝催化剂,并进行了氨选择性催化还原NO反应(NH3-SCR)和BET、XRD、XPS等表征。以硝酸锰为前体的催化剂具有更好的低温脱硝活性,在反应温度150~250℃的范围内,MnN/TiO2/CC催化剂的脱硝率接近100%;而当反应温度超过250℃后,MnA/TiO2/CC催化剂比MnN/TiO2/CC催化剂具有更高的脱硝活性。表面Mn活性位和弱酸位多是MnN/TiO2/CC催化剂低温SCR活性好的主要原因。

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