| 摘要 |
Diesel engines and/or lean-burn internal combustion engines require a so-called SCR catalyst for the selective catalytic reduction (SCR) of nitrogen oxides to purify their exhaust gases, which can be additionally activated by non-thermal gas-discharge plasmas. According to the invention, the hydrocarbons contained in the exhaust gases are absorbed to a large extent, and the exhaust gases are then fed to the non-thermal gas-discharge plasma. An ammonia-based reducing agent is added to the exhaust gases treated this way and the exhaust gases are supplied to the SCR catalyst to reduce the nitrogen oxides. The corresponding inventive device is characterized in that a hydrocarbon absorber (3), a gas-discharge reactor (4), a dosing unit (6) for a reducing agent (RM) and an SCR catalyst (8) are connected in series in the exhaust gas train close to the engine.
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