Selective denitrification of flue gas by O3 and ethanol mixtures in a duct: Investigation of processes and mechanisms
2016
Ding, Jie | Cai, Heruijing | Zhong, Qin | Lin, Jiandong | Xiao, Junjun | Zhang, Shule | Fan, Maohong
A novel selective denitrification process, referred as O3-ethanol oxidation method, was developed by injecting O3 and ethanol mixtures into the simulated flue gas duct. The organic radicals, generated through the ethanol oxidation by O3, can oxidize NO into NO2, and finally into important industrial raw, namely, nitrate organics or aqueous nitrate acids. The residual ethanol in the tail can be recycled. The CO32−, HCO3− and SO2 in the flue gas hardly exhibit any effect on the NOX removal. Compared to the conventional O3 oxidation method, the present method shows higher selective oxidation of NO, higher NOX removal and less O3 consumption as well as proves lower initial investment and operating costs with more compact equipment.
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