Buttignol, FilippoGarbujo, AlbertoBiasi, PierdomenicoRentsch, DanielKroecher, OliverFerri, Davide2022-03-142022-03-142022-03-142022-03-0110.1016/j.cattod.2021.09.020https://infoscience.epfl.ch/handle/20.500.14299/186342WOS:000753564200004The effect of an alumina-based binder on the structure of a commercial Fe-ZSM-5 catalyst has been investigated. Several ex-situ characterization techniques were used to show that the binder in the catalyst formulation allows obtaining a material that possesses improved features in terms of Fe species dispersion, framework Al content and acidity. UV-Vis and X-ray absorption spectroscopy showed that the extent of Fe agglomeration in the extruded catalyst was significantly lower compared to that in the catalyst without binder. Al-27 and Si-29-MAS NMR spectroscopy demonstrated a remarkable difference in terms of framework Al migration. NH3-TPD experiments corroborated the NMR results suggesting a retention of Bronsted acidity in the extruded catalyst. We tentatively propose that by providing extra-framework Al species prior to the treatment at elevated temperature, the binder hinders the framework Al dislodgment and Fe agglomeration during calcination.Chemistry, AppliedChemistry, PhysicalEngineering, ChemicalChemistryEngineeringfezsm-5binderextrudateframework alselective catalytic-reductionfe-beahydrothermal stabilityhzsm-5 zeoliteactive-sitesironnh3-scrtemperatureframeworkscrtext::journal::journal article::research article