Abstract:

V2O5-Fe2O3 composite nanoparticles were prepared through the high-pressure hydrothermal method．By changing the hydrothermal solvent，the morphology of nanoparticles was controlled．XRD and SEM results showed the B-V2O5-Fe2O3 nanoparticle was a rod like structure with H2O2 as solvent，and there were some small spherical particles adhered．The Q-V2O5-Fe2O3 of globular structure was prepared using NH3?H2O as solvent．And two morphologies of composite nanoparticles were of great crystallinity．The commercial columnar activated-coke were prepared with H2O2-HNO3 joint oxidation modification method to obtain HAC，different morphologies of the composite nanoparticles were loaded on which to prepare the B-V-Fe/AC and Q-V-Fe/AC catalysts．Under the conditions of Simulated flue temperature 200 ℃，space velocity 6 000 L/(Kg?h)，AC's amount of 10 g and the total flow rate of the mixed gas was 1 L/min，of which φ(O2)=5%，φ(NO)=0.05%，φ(NH3)=0.05%，the denitrification performance of different catalysts were evaluated．The results showed，when the loading amount of B-V2O5-Fe2O3 is 1%，the denitrification performance of B-V-Fe/AC is the best with a rate of 69.42%，which were increased by 17.75% and 1.69%，compared to HAC and Q-V-Fe/AC．

Key words: activated coke, iron, vanadium, composite nanoparticle, SCR