Study on the Effect of Roasting Temperature on Denitration Performance of Rare Earth Tailings Monolithic Catalyst Activated by Sulfuric Acid
Using the catalyst powder of rare earth tailings activated by sulfuric acid as raw material,a mono-lithic catalyst was prepared by adding additives and integral extrusion,and then characterized and analyzed by XRD,BET,XPS,and H2-TPR.In addition,its catalytic denitration reaction activity and N2 selectivity were tested on a denitration activity test platform to determine the suitable roasting system of the catalyst.The results show that the strip-shaped catalyst roasted at 350 ℃ presents the best catalytic denitration ac-tivity and the largest specific surface area.The XPS spectral peak of its Fe2p orbital shifts towards high binding energy,indicating a significant Fe-Ce synergistic effect.At this roasting temperature,a honeycomb-shaped catalyst with a denitration efficiency of 81％and high N2 selectivity can be prepared,and its me-chanical strength meets the national standard for the monolithic catalysts.
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