关键词: 过氧化氢, 氧化, 燃煤烟气, 氮氧化物, Hydrogen peroxide, Oxidation, Flue gas, Nitrogen oxides, 过氧化氢, 氧化, 燃煤烟气, 氮氧化物

Abstract: The process of flue gas purification with H₂O₂ for nitrogen oxide abatement has become a resource-economical and environment-friendly technology. The influences of H₂O₂ concentration，pH values，the initial concentration of NO_x and temperature on the efficiency of denitrification were studied in a bubbling reactor. The feasibility of H₂O₂ matching different types of absorbent technology was also discussed in this paper and the optimal condition was achieved. The denitrification efficiency can be 43.96%，which were gained under the concentration of H₂O₂ 50%，pH value about 3，the temperature about 363 K，the initial concentration of NO_x about 450—500 mg/m³. The initial absorption efficiencies of 5% urea solution，slurry and water were 56.91%，51.77% and 50.12% respectively，where the flue gas was treated by 50% H₂O₂ solution. It was found that the efficiency declined with the time extended. Studies also showed that it could significantly slow the decline in the efficiency of denitrification when ethylenediamine was added in the urea solution.

Key words: hydrogen peroxide, oxidation, flue gas, nitrogen oxides