关键词: 催化剂载体, 催化剂, 选择性催化还原, 工业钛钨粉, 脱硝性能

Abstract: In order to improve the quality of domestic industrial titanium tungsten powder (WO3/TiO2)，V2O5-WO3/TiO2 DeNOx selective catalytic reduction (SCR) catalysts were prepared by the impregnation method under different conditions using domestic and imported industrial titanium tungsten powder as raw materials. DeNOx performance was tested. And the structure and composition of the as-prepared catalysts were characterized by low-temperature N2 adsorption，X ray diffraction (XRD) and scanning electron microscopy with Energy-Dispersive X-Ray (SEM/EDX) analyzing system，respectively. The experiment results demonstrated that the DeNOx performance of catalysts prepared by domestic titanium tungsten powder was slightly worse than the imported ones under the same preparation conditions. Besides the composition of domestic titanium tungsten powder，the smaller the pore volume，a small amount of rutile existed in the domestic titanium tungsten power，the lower loading amount of active component V2O5.，smaller grain size and greater sintering degree of the catalysts prepared by domestic titanium tungsten powder，were responsible for their poorer DeNOx performance. To increase domestic titanium tungsten powder quality，not only its appropriate composition (such as higher amount of WO3)，but also its pore volume and anatase phase should be considered.

Key words: catalyst carrier, catalyst, selective catalytic reduction, industrial titanium tungsten powder, DeNOx performance