Application of TiO2-Montmorillonite Composite Carrier in Plate-type De-NOx Catalyst

Abstract

In order to improve the catalytic property of the plate-type De-NOx catalysts, TiO2-montmorillonite and TiO2-acid treated montmorillonite were used as the composite carriers for the preparation of the catalyst. XRF, XRD, N2-adsorption, Raman, H2-TPR and NH3-TPD analysis were carried out to investigate the physical and chemical properties of the catalysts. The result shows that the BET surface area and the attrition strength of the catalysts with the using of composite carriers are higher than that of the traditional V2O5-MoO3/TiO2 catalyst. Alkali metal element (Na, K) contained in the montmorillonite has negative effect on the reducibility and acidity of V2O5-MoO3/TiO2-montmorillonite catalyst, which is unfavorable for the catalytic performance. The acid treatment improves the BET surface area of the montmorillonite, and decreases the alkali metal element content simultaneously. As a result, the catalytic activity of V2O5-MoO3/TiO2-acid treated montmorillonite catalyst is relatively high. Addtionally，this catalyst also exhibits well SO2 and H2O resistance.

Keywords

• de-nox
• montmorillonite
• composite carrier
• plate-type