Performance of V2O5/NPTiO2–Al2O3-nanoparticle- and V2O5/NTiO2–Al2O3-nanotube model catalysts in the SCR–NO with NH3

• V2O5/NPTiO2–Al2O3 nanotubes and V2O5/NPTiO2–Al2O3 nanoparticles were obtained.
• V2O5/NTiO2–Al2O3 catalysts showed remarkable acidity up to 400 °C.
• V2O5/NTiO2–Al2O3 and V2O5/NPTiO2–Al2O3 catalysts showed thermal stability up to 480 °C.
• V2O5/NTiO2–Al2O3 and V2O5/NPTiO2–Al2O3 are tolerant to deactivation of 10% vol. of H2O.

In this study, the NO reduction by NH3 over V2O5/NPTiO2–Al2O3 (nanoparticles) and V2O5/NTiO2–Al2O3 (nanotubes) catalysts synthesized by the sol–gel method with 10 and 5 wt.% of Al2O3 and V2O5, respectively, is reported. The V2O5/NPTiO2–Al2O3 and V2O5/NTiO2–Al2O3 catalysts showed remarkable conversion, high acidity, structure stability, N2 selectivity and a high resistance to deactivation in the presence of 10 vol.% of H2O within the 200 to 500 °C temperature interval. The nanostructured catalysts developed in this work are an excellent alternative to improve the SCR–NH3 process, both expanding its operation window and preventing deactivation by H2O at high temperatures.

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