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

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Abstract

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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Authors
  1. R. Pirone
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  2. E. Garufi
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  3. P. Ciambelli
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  4. G. Moretti
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  5. G. Russo
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Pirone, R., Garufi, E., Ciambelli, P. et al. Transient behaviour of Cu-overexchanged ZSM-5 catalyst in NO decomposition. Catalysis Letters 43, 255–259 (1997). https://doi.org/10.1023/A:1018967328681

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