The recycling mode of using waste catalyst to prepare regenerated TiO2-WO3 powder for catalyst production is the mainstream process of resource utilization of waste flue gas denitration catalyst in thermal power plants. Currently

due to lack of the clear professional standard and effective quality supervision

the regenerative Ti O2-WO3 powder products generally have such quality defects as high contents of impurities and toxins

large content deviations of active ingredients

large particle size and poor uniformity

low specific surface area and pore volume

irrational pore structure. These defects would bring quality problems for downstream catalyst products

including deterioration of geometrical features

increase of unit density

decline of reaction activity and stability

low toxin resistance and short chemical life-time. In this case

the quality standards and detection methods should be established immediately

and the specific SCR catalyst management mode should be developed for thermal power plants

to guide a better development of the SCR catalysts recycling industry.