METHOD FOR REMOVING NITROGEN OXIDE OF EXHAUST GAS AND DEVICE FOR REMOVING NITROGEN OXIDE OF EXHAUST GAS

摘要

PROBLEM TO BE SOLVED: To provide a method for removing nitrogen oxide of exhaust gas and a device for removing nitrogen oxide of exhaust gas capable of purifying nitrogen oxide in exhaust gas without supplying reducing agent for nitrogen oxide irrespective of oxygen concentration of exhaust gas and exhaust gas temperature in relation to exhaust gas containing nitrogen oxide such as exhaust gas of diesel engine.

SOLUTION: This method for removing nitrogen oxide of exhaust gas includes a first step for reforming nitrogen oxide in exhaust gas G to adsorbent nitrogen oxide and nitrogen oxide ion, a second step for adsorbing adsorbent nitrogen oxide and ionizing the same to nitrogen oxide ion, a third step for forming electric field E at an adsorption part 31 of an adsorption means 30 and enriching the nitrogen oxide ion to a part 31a in the adsorption part 31 by electrophoresis, and a fourth step for reducing nitrogen oxidation ion enriched in the third step.

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