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Article Dans Une Revue Studies in Surface Science and Catalysis Année : 2004

Selective Catalytic Reduction of no by NH3 on Fe-ZSM-5 Elaborated from Different Methods

Résumé

Different methods of preparation have been used to introduce iron species in the zeolite ZSM-5. Special consideration has been devoted to the FeCl3 sublimation method. The various samples have been characterised by XRD and temperature programmed reduction. Two general types of species have been identified: iron oxide aggregates and iron cationic species. In the SCR of NO by NH3, Fe-ZSM-5 prepared from sublimation of FeCl3 displays the highest activity which is assumed to be related to the formation of iron-oxo complexes. The formation of these species is enhanced by a rapid washing of the preparation after the sublimation of FeCl3 following by a calcination with 5–10%O2 atmosphere. The SCR activity has been correlated with the activity in oxidising NO to NO2.

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Catalyse
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Dates et versions

hal-00178905 , version 1 (12-10-2007)

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Gerard Delahay, Ariel Guzman-Vargas, David Valade, Bernard Coq. Selective Catalytic Reduction of no by NH3 on Fe-ZSM-5 Elaborated from Different Methods. Studies in Surface Science and Catalysis, 2004, 154 C, pp.2501-2508. ⟨10.1016/S0167-2991(04)80516-0⟩. ⟨hal-00178905⟩
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