Portal de Periódicos da CAPES

Accessibility of the Fe-species in Fe/ZSM-5 prepared via FeCl3 sublimation

2003; Elsevier BV; Volume: 64; Issue: 1-3 Linguagem: Inglês

10.1016/s1387-1811(03)00465-7

1873-3093

Johannes H. Bitter, A.A. Battiston, Sander van Donk, Krijn P. de Jong, D.C. Koningsberger,

Catalysis and Hydrodesulfurization Studies

Microscopic characterization by TEM, EELS and EXAFS, in combination with adsorption studies on a macroscopic scale using a tapered element oscillating microbalance, revealed that the accessibility of the micropores in over-exchanged Fe/ZSM-5 prepared via FeCl3 sublimation is retarded by pore blocking caused by iron species in the zeolite pores. As a result, the potentially active sites which are located deeply inside the zeolite do not contribute significantly to the activity of the catalyst towards the selective catalytic reduction of NO by isobutane.