Nitrogen oxides reduction method in a circulating combustion exhaust gas at n2, exhaust system for the treatment of nox in a combustion exhaust gas circulating in the system, and, apparatus

摘要

METHOD OF REDUCING NITROGEN AXIDES IN A NUMBER OF CIRCULATING COMBUSTION EXHAUST GAS, EXHAUST SYSTEM FOR THE TREATMENT OF NOX IN A COMBUSTION EXHAUST GAS THAT CIRCULATES IN THE SYSTEM, AND, APPLIANCE. A method of reducing nitrogen oxides (NO ^ X ^), in a flue exhaust gas flow to N2, the method comprising the oxidation of nitrogen monoxide to nitrogen dioxide in a transition metal / zeolite catalyst in catalyst bed temperatures below 50 ° C and reduction of NO ^ X ^ with the catalyst using a hydrocarbon (HC) reducer at catalyst bed temperatures below 150 198 C.