<b>Elective catalytic reduction of NO with propane on V2O5/SiO2, V2O5/TiO2, and V₂O₅/Al₂O₃ catalysts obtained through the sol-gel method</b> - doi: 10.4025/actascitechnol.v35i1.11888

Resumo

 

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 400ºC 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.