Effect of Zn on Catalytic Performances of Industrial V-Mo/Ti De-NO_x Catalyst

Different contents of Zn was loaded on V-Mo/Ti catalyst by impregnation method,and the activity of selective catalytic reduction of NO by NH₃ was evaluated.The catalysts were characterized by XRD,N₂ adsorption-desorption,NH₃-TPD,H₂-TPR and NO-TPD.The results show that Zn loading does not change the crystal structure of V-Mo/Ti catalyst,but reduces the specific surface area and reduction performances of V-Mo/Ti catalyst.Furthermore,Zn loading reduces the acid content as well as the NO adsorption performance of the catalyst,decreasing the catalytic denitration performances of the catalyst.With 0.5 mol/L H₂SO₄ solution for washing the Zn poisoned catalyst,the Zn loaded on the catalyst can be effectively removed.