Hydrothermal Synthesis of Titanate Nanotubes with Different Pore Structure and its Effect on the Catalytic Performance of V ₂ O ₅ -WO ₃ /Titanate Nanotube Catalysts for NH ₃ -SCR

In this work, titanate nanotubes (TNT) with different pore structure were synthesized through hydrothermal method by using various TiO ₂ particles as starting materials. V ₂ O ₅ and WO ₃ was deposited on the as-synthesized TNT structure by wet impregnation. In the selective catalytic reduction of NO with NH ₃ , it was found that the catalytic activity of V ₂ O ₅ -WO ₃ /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 V ₂ O ₅ -WO ₃ /TNT catalysts and traditional V ₂ O ₅ -WO ₃ /TiO ₂ 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.