| 摘要 |
PURPOSE: To effectively remove NOx in waste gas to discharge no harmful by-products by electrolyzing gas to be treated into oxygen and ammonia by a solid electrolytic body and purifying the treated gas contg. the electrolytic products by catalytic reaction. CONSTITUTION: A nitrogen oxide removing device consists of an electrolyzer 1 and a catalytic device 2, and the two are connected by a communicating pipe 10. The electrolyzer 1 is provided with a cylindrical solid electrolytic body 3 having hydrogen ion conductivity and/or oxide ion conductivity in the center of the inside of a housing. On both the inner and outer sides of the solid electrolytic body 3, an anode 4 and a cathode 5 each formed of a platinum electrode are formed. And a DC current is applied to between the electrodes 4, 5 and gas to be treated contg. water and nitrogen oxide is brought into contact with the solid electrolytic body 3. Then, water in the gas is electrolyzed to reduce oxygen and nitrogen oxide in the gas on the anode 4 side and on the cathode 5 side respectively to form ammonia. Next, in the 2nd process, oxygen and ammonia are brought into contact with a catalyst to reduce the nitrogen oxide. |
