Hydrothermal Synthesis of Titanate Nanotubes with Different Pore Structure and its Effect on the Catalytic Performance of V₂O₅-WO₃/Titanate Nanotube Catalysts for NH₃-SCR

Abstract

In this work, titanate nanotubes (TNT) with different pore structure were synthesized through hydrothermal method by using various TiO₂ particles as starting materials. V₂O₅ and WO₃ was deposited on the as-synthesized TNT structure by wet impregnation. In the selective catalytic reduction of NO with NH₃, it was found that the catalytic activity of V₂O₅-WO₃/TNT catalysts was unaffected by the initial different pore structure because the pore structure collapsed during the active metal impregnation and subsequent calcination. Also, kinetic analysis showed that the apparent activation energies of V₂O₅-WO₃/TNT catalysts and traditional V₂O₅-WO₃/TiO₂ catalyst were the similar values, which indicate that the nature of active sites in the SCR reaction on both catalysts would not be significantly different.