Catalytic decomposition of N2O and catalytic reductionof N2O and N2O + NO by NH3 in the presence of O2 over Fe-zeolite - Archive ouverte HAL Accéder directement au contenu
Article Dans Une Revue Applied Catalysis B: Environmental Année : 2003

Catalytic decomposition of N2O and catalytic reductionof N2O and N2O + NO by NH3 in the presence of O2 over Fe-zeolite

Résumé

The decomposition of N2O, and the catalytic reduction by NH3 of N2O and N2O + NO, have been studied on Fe-BEA, -ZSM-5 and -FER catalysts. These catalysts were prepared by classical ion exchange and characterized by TPR after various activation treatments. Fe-FER is the most active material in the catalytic decomposition because “oxo-species” reducible at low temperature, appearing upon interaction of FeII-zeolite with N2O (-oxygen), are formed in largest amounts with this material. The decomposition of N2O is promoted by addition of NH3, and even more with NH3 + NO in the case of Fe-FER and -BEA. It is proposed that the NO-promoted reduction of N2O originated from the fast surface reaction between -oxygen O? and NO? to yield NO2?, which in turn reacts immediately with NH3.

Dates et versions

hal-00178376 , version 1 (11-10-2007)

Identifiants

Citer

Ariel Guzman-Vargas, Gerard Delahay, Bernard Coq. Catalytic decomposition of N2O and catalytic reductionof N2O and N2O + NO by NH3 in the presence of O2 over Fe-zeolite. Applied Catalysis B: Environmental, 2003, 42-43, pp.369-379. ⟨10.1016/S0926-3373(02)00268-0⟩. ⟨hal-00178376⟩
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