Ce-promoted Fe–Cu–ZSM-5 catalyst: SCR-NO activity and hydrothermal stability

Fe–Cu–ZSM-5 and Ce–Fe–Cu–ZSM-5 solids prepared using solid-state ion exchange method (SSIE) were tested in the NH3–SCR of NO reaction characterized N2 physisorption at 77 K, MAS 27Al magnetic resonance, X-ray diffraction, scanning electron microscopy, EPR spectroscopy transmission microscopy coupled to energy-dispersive order follow effect Ce addition on textural structural properties Fe–Cu–MFI system as well detection changes local environment state iron copper species, degradation zeolite texture structure after a severe aging treatment 850 °C for 5 h. Fresh Ce-promoted sample showed better conversion up 450 than unpromoted catalyst. An activity loss was observed aged catalysts, but remaining less pronounced catalyst containing Ce. The did not occur during aging, while probable migration metal active species change their coordination has occurred.