同时脱除烟气中硫和硝的V2O5/AC催化剂研究

To achieve the aim of simultaneous SO2 and NOx removal from flue gas in a fix bed at the temperature of about 200 ℃, a novel catalyst of V2O5/activated coke (AC) was investigated. The experimental results show that the SO2 and NO removal activity of V2O5/AC at 200 ℃ is higher than that of pure AC. The effect of V2O5 loading was investigated as well. The SO2 capacity increases from 3% to 12% as the V2O5 loading increases from 0.5% to 9%, and the NO conversion shows a fall trend with increasing the V2O5 loadings. Results from the temperature programmed desportion (TPD) and FTIR reveal that H2SO4, ammonium-sulfate salt and VOSO4 are generated on the catalyst during SO2 and NO removal. The VOSO4 content would increase with the increase of V2O5 loading. The used V2O5/AC is regenerated at 300 ℃ by 5%NH3/Ar. It is found that the regeneration significantly increases the selective catalytic removal activity of NO, and improves the SO2 removal activity to a certain extent.