Treatment of diesel engine exhaust gases, involves treating with ozone gas from non-thermal plasma source

摘要

A process to treat diesel engine exhaust gases involves supplying ozone gas from a reactor at a feed point (54) to the exhaust system. An oxidation reactor (20) is located in the exhaust system especially prior to the feed point (54), partially oxidizing nitric oxide and/or hydrocarbons. The oxidation reactor operates especially during the start-up and warm-up phases of motor operation. An Independent claim is also included for a commensurate assembly in which the oxidation reactor is a plasma reactor (20) generating a non-thermal plasma by a silent electric discharge or ultra-violet lamp. The silent discharge is a dielectric-dampened discharge. The ozone reactor (30) is a second non-thermal plasma reactor. The mixed and plasma-treated exhaust gases are discharged via a catalytic filter unit (10).