Abstract
In the present study, the solid-state ion exchange method (SSIE) was applied to introduce iron and copper into highly silicate zeolites: beta (BEA, Si/Al = 12.5), ferrierite (FER, Si/Al = 10) and mordenite (MOR, Si/Al = 10). The activity of the prepared samples in the selective catalytic reduction of NO with ammonia (NH3-SCR) was measured. The highest performance was recorded for Cu-Fe-BEA followed by Cu-Fe-MOR while Cu-Fe-FER showed a low catalytic activity over the entire reaction temperature range. It is shown in this study that the zeolite framework is one of the parameters controlling the amount, environment and distribution of metal species formed during the ion exchange process in Cu-Fe-zeolite catalysts.
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•Cu-Fe-zeolite solids were prepared by solid-state ion exchange using silicon-rich BEA, MOR and FER zeolites.•Tested catalysts in the NH3-SCR of NO reaction were active and selective towards N2.•The zeolite framework affects the amount, environment and distribution of metal species contained in Cu-Fe-zeolite catalysts.