Research on the Quality and Characteristics of Carriers for Resource Reuse of Waste Flue Gas Denitration Catalyst

In this study, three resource-recycled titanium-based carriers and one fresh titanium-based carrier were selected and analyzed to study the differences between these two types of carriers by virtue of laser particle size analyzer, X-ray fluorescence (XRF) analyzer, inductive coupled plasma (ICP) emission spectrometer, BET testing method and mercury intrusion porosimeter, etc. Furthermore, the above four carriers were used as raw materials to prepare finished catalyst products through active component loading and extrusion molding. Then the main components and trace element contents, specific surface area, mechanical strength, denitration efficiency and activity were tested respectively in the finished catalysts. The results show that, compared with fresh titanium-based carriers, the resource-recycled titanium-based carriers have more uneven particle size distribution, smaller specific surface area, less specific pore volume, and higher contents of toxic elements, which will affect the qualities of the corresponding finished catalysts, and eventually result in low denitration efficiency and activity.