Transient behaviour of Cu-overexchanged ZSM-5 catalyst in NO decomposition

被引：0
|
作者：
R. Pirone
E. Garufi
P. Ciambelli
G. Moretti
G. Russo
机构：
来源：
Catalysis Letters | 1997年 / 43卷
关键词：
Zeolite; Catalytic Decomposition; Outlet Concentration; Outlet Reactor; Copper Site;
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摘要：
The adsorption of NO at 80°C on Cu-overexchanged ZSM-5 (Si/Al=80) has been investigated in a flow apparatus. The formation of N2O during a transient phase was observed after He pretreatment of the zeolite at 550°C. A negligible amount of N2O was detected, in contrast, from O2 pretreated zeolite. The formation of N2O has been associated to the reoxidation from Cu+ to Cu2+ of a fraction (about 40%) of copper in the zeolite. The redox chemistry in NO adsorption at low temperature can be related to the activity of Cu-ZSM-5 zeolite in NO decomposition.
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页码：255 / 259
页数：4
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