Deposition of Selective Catalytic Reduction Coating on Wire-Mesh Structure by Atmospheric Plasma Spraying

A series of catalytic coatings consisting of MnO(x)-CeO(2) and TiO(2) support were prepared by atmospheric plasma spraying, which was aimed at the application of selective catalytic reduction (SCR) of NO(x). The effect of the load of active component on the coating was firstly studied. The results showed that all the coating presented the highest catalytic activity at approximately 350 °C and the coating with the composition of 20MnO(x)/5CeO(2)/TiO(2) (wt%) achieved the most powerful performance. The coating was then prepared on a wire-mesh structure substrate, which can be easily assembled as a gas filter. The results showed that the specific surface area was greatly increased resulting in the significant improvement of the catalytic activity of the coating. This strategy offered a promising possibility of removing NO(x) and particulate fliting simultaneously in industrial applications.