Study on denitration performance of mineral catalyst prepared by high energy ball milling of rare earth concentrate supported Fe2O3 for NH3-SCR

Vanadium-bearing steel slag catalysts for the selective catalytic reduction of NOx by NH3

“…The existence of these two species is beneficial to promote the denitration reaction. 44–47 After sulfuric acid modification, diffraction peaks at 14.7°, 25.6°, 29.7°, 32.1°, 47.5°, 49.4°, 52.5°, 54.1° and 55.0° over the VSS-S-5 and VSS-C-S catalysts are observed, which can be attributed to the characteristic peaks of CaSO 4 . At the same time, the characteristic peaks of α-Fe 2 O 3 and obvious characteristic peaks of VO 2 appeared, while the characteristic peaks of CaCO 3 decreased.…”

Preparation of high temperature NH3-SCR catalysts with carbonate as precursors by ball milling method

“…Also, the ball milling method accounts for the difference in Ce 3+ and O α ratio, because the mechanical movement is benefit to improve the O α ratio. 31 Therefore, the ball milling process can be used to control the dispersion of the active component on the catalyst surface and improve the redox characteristics by increasing the Ce 3+ and O α ratio. In the XPS of Ti 2p ( Fig.…”