Preparation and characterization of VO-ZSM5 catalyst for the selective reduction of NO with ammonia

The structural characteristics and catalytic behavior of VO-ZSM5 catalysts, obtained by oxidative degradation of vanadyl acetyl acetonate, were characterized by FTIR spectroscopy and XRD analysis. The organometallic precursor was analysed during the preparation and activation steps. The thermal decomposition of the organometallic compound led to the formation of V-oxides anchored to the aluminosilicate surface in a stressed ligand field instead of an ordered oxide structure. The catalysts which were prepared by impregnation of a planar complex of V on ZSM5 were active for the selective reduction of NO with ammonia.