Title :
Time dependence of NOx removal rate by a corona radical shower system
Author :
Ohkubo, Toshikazu ; Kanazawa, Seiji ; Nomoto, Yukiharu ; Chang, Jen-Shih ; Adachi, Takayoshi
Author_Institution :
Fac. of Eng., Oita Univ., Japan
Abstract :
In this paper, the effects of flue gas flow rate and seed gas on the dynamics of corona discharge current-voltage characteristics and NO x removal characteristics are experimentally investigated for a corona radical shower system. The corona discharge current-voltage characteristics have two operating modes which have a significant influence on NOx removal characteristics, where the threshold value of the treatment gas to seed gas flow rate ratio is about 8. The hysteresis of corona current-voltage characteristics is observed in this system. For longer operational time, corona current and NOx removal rate significantly changes with time. When the operation of the apparatus starts at relatively low applied voltage, the corona current under constant applied voltage increases with time to reach a maximum value, then decreasing with time to reach a steady state. At this condition, high NOx removal efficiency can be achieved
Keywords :
air pollution control; corona; electrostatic devices; nitrogen compounds; NOx removal rate; air emissions control; corona current; corona discharge; corona radical shower system; current-voltage characteristics; flue gas flow rate; hysteresis; removal efficiency; seed gas flow rate; treatment gas; Corona; Current-voltage characteristics; Electrodes; Electron beams; Flue gases; Fluid flow; Industry Applications Society; Plasma temperature; Power engineering and energy; Voltage;
Journal_Title :
Industry Applications, IEEE Transactions on
