Abstract
Preparation of a Fe-mordenite catalysts was carried out by impregnation using Fe(acac)3 precursor in order to have iron oxide species deposited at the surface of the zeolite. The selective presence of iron oxide species was determined andascertained by temperature programmed reduction (TPR). In the selective catalyticreduction of NO by ammonia, no difference of conversion between the catalysts wasobserved indicating that well dispersed iron oxide species are active species for thisreaction. Nevertheless, the obtained activity remains lower than catalysts containingiron cationic species at the exchange sites.