Reduction of NOx from natural gas combustion flue gases by corona discharge radical injection techniques

An experimental investigation has been conducted to reduce NOx in natural gas combustion due gases by means of corona-discharge-activated ammonia/methane radical injection methods, The multihole-type corona radical injectors are used in the present investigation, Experiments were conducted for the simulated natural gas combustion flue gas (N-2:O-2:CO2:NO = 83.96:8:8:0.04) flow rate from 1 to 200 L/min, the activation voltage (de or pulse) from 0 to 40 kV, and the Ar-ammonia or Ar-methane mixture gases how rate from 0 to 200 mL/min. The results show that the NOx reduction increases with increasing activation voltage and nonmonotonically depends on ammonia/methane stoichiometry.