| abstract |
The use of a so-called SCR catalytic converter for the selective catalytic reduction (SCR) of nitrogen oxides is known for cleaning exhaust gases from diesel engines and / or lean-burn engines, wherein the exhaust gases can also be activated by non-thermal gas discharge plasmas. According to the invention, the hydrocarbons contained in the exhaust gas are first largely adsorbed, then the exhaust gas is exposed to the non-thermal gas discharge plasma, then an ammonia-based reconstruction agent is added to the pretreated exhaust gas, and finally the exhaust gas is fed to the SCR catalyst to reduce the nitrogen oxides. In the associated device, a hydrocarbon adsorber (3), a gas discharge reactor (4), a metering unit (6) for a reducing agent (RM) and an SCR catalytic converter (8) are connected in series in the exhaust line. |