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A series of Fe-Y zeolite catalysts with different Fe loading were prepared by ferrocene sublimation under solvent and water-free conditions.The dispersion,structure and morphology of the iron species on the Fe-Y catalysts were characterized by XRD,TEM and UV-Vis.The catalytic activities of Fe-Y samples were measured in selective catalytic reduction of NO with ammonia(NH3-SCR).The results showed that the iron species on the HY zeolite support were mainly made up of isolated Fe3+ions,Fex Oy oligomers and a little amount of<3 nm spherical Fe2O3particles.Isolated Fe3+ions are predominating among all the Fe-Y catalysts.The sum of isolated Fe3+ions and Fex Oy oligomers took up more than 90%percent of total iron species on the Fe-Y till 10.0 wt%loading of Fe.
A series of Fe-Y zeolite catalysts with different Fe loading were prepared by ferrocene sublimation under solvent and water-free conditions. The dispersion, structure and morphology of the iron species on the Fe-Y catalysts were characterized by XRD, TEM and UV- Vis. Catalytic activities of Fe-Y samples were measured in a selective catalytic reduction of NO with ammonia (NH3-SCR). The results showed that the iron species on the HY zeolite support were mainly made up of isolated Fe3 + ions, Fex Oy oligomers and a little amount of <3 nm spherical Fe2O3 particles. Isolated Fe3 + ions are predominating among all the Fe-Y catalysts. The sum of isolated Fe3 + ions and Fex Oy oligomers took up more than 90% percent of total iron species on the Fe-Y till 10.0 wt% loading of Fe.