Abstract:The Cu doped Fe/β (40) catalysts were prepared by ion-exchanged/wetness-impregnation methods and characterized using various analytical techniques, including H2-TPR, XRD, UV-vis and XPS. Appropriate amount of copper enormously improved the low temperature activity of Fe/β (40) and broadened the temperature window of activity. Excessive amount of copper decreased the N2 selectivity of catalysts. 1.27%Cu-2%Fe/β catalyst obtained the best performance attributed to many ion-exchanged positions of Fe3+ and Cu2+. However, a large amount of CuO can promote NH3 oxidation at high temperature, and decrease N2 selectivity and narrow down the temperature window of activity. Cu doping may make the migration and agglomeration of Cu and Fe species more easily under high-temperature hydrothermal conditions, which leads to hydrothermal stability of Cu-Fe/β (40) catalyst change.
赵茹, 姜水燕, 周仁贤. 铜掺杂对Fe/β催化剂NH3-SCR催化性能的影响[J]. 浙江大学学报(理学版), 2017, 44(4): 485-492.
ZHAO Ru, JIANG Shuiyan, ZHOU Renxian. The effect of Cu doping on catalytic performance of Fe/β catalyst for NH3-SCR. Journal of ZheJIang University(Science Edition), 2017, 44(4): 485-492.
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