elective catalytic reduction of NO with propane on V2O5/SiO2, V2O5/TiO2, and V2O5/Al2O3 catalysts obtained through the sol-gel method

Abstract

Vanadium-based compounds have received a lot of attention in the last years due to their high and selective catalytic activities in major industrial reactions. The catalytic properties of V2O5 may be strengthened and modified when it is dispersed in pure oxides like SiO2, TiO2, and Al2O3. In this work, mixed oxides V2O5/SiO2, V2O5/TiO2, and V2O5/Al2O3 were prepared through the sol-gel method and obtained in nominal concentrations of 10% of V2O5. All samples were submitted to calcination in muffle at 400°C for 5h. The characterization of the materials by nitrogen adsorption indicated that they present a mesoporous structure. XRD results disclosed that vanadium is highly dispersed in mixed oxide 10% V2O5/TiO2. The materials obtained were studied through selective catalytic reduction (SCR) of NO with propane. It was observed that the V2O5/TiO2 system presented a greater efficiency in the conversion of NO to N2 associated to a higher dispersion of vanadium in the support, if compared with the results of other systems reported in literature.