Characterization of CeO2-WO3/TiO2 Catalysts Prepared by Adding Glass Fibre for Selective Catalytic Reduction of NOx with NH3

A series of glass fibre doped Ce-W/TiO2 catalysts were investigated for the selective catalytic reduction of NOx by NH3. The adhesion and mechanical strength of the CeO2-WO3/TiO2 catalyst was greatly enhanced by the addition of 6% glass fibre. However, the glass fiber contains a small amount of alkali metals, which occupied the active site on the surface of the CeO2-WO3/TiO2 catalysts, thus the catalytic performance of catalyst was inhibited by the addition of glass fibre. Furthermore, BET, XRD, XPS, TPR and TPD methods revealed that the addition of glass fiber can inhibit the formation of catalyst pore structure and reduce the content of Ce3+, adsorbed oxygen and the Bronsted and Lewis acid sites on the catalyst surface, thereby affecting the redox abilities, nitrogen oxides and ammonia adsorption capacity of catalysts.

Automated summary

The addition of glass fiber enhanced the adhesion and mechanical strength of CeO2-WO3/TiO2 catalyst, but the alkali metals in the fiber inhibited the active sites, affecting catalytic performance. Furthermore, the addition of glass fiber affected the formation of catalyst pore structure, reduced the content of active sites, and impacted the catalyst's redox abilities and adsorption capacity for nitrogen oxides and ammonia.