Selective catalytic reduction of nitric oxide with ammonia on Fe-ZSM-5 catalysts prepared by different methods

On the most active catalyst, Fe(0.83)subZSM-5, prepared starting from FeCl3, a study of the mechanism was undertaken. In the initial step of the SCR reaction, the oxidation of NO in NO2, the re-oxidation of FeII species in the active iron oxo species is the slow phase.