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发明申请
US20090257924A1 Device for the reduction of nitrogen oxides in the exhaust gas of internal combustion engines 审中-公开
用于还原内燃机废气中的氮氧化物的装置

Device for the reduction of nitrogen oxides in the exhaust gas of internal combustion engines
摘要：
A device for the reduction of nitrogen oxides in the exhaust gas of internal combustion engines has a thermolysis reactor (10). In the thermolysis reactor (10), urea is converted into ammonia and isocyanic acid by means of the supply of heat. In a preferred embodiment of the invention, the thermolysis reactor (10) is arranged within the exhaust gas duct (26) and is thermally coupled to an oxidation catalytic converter (30) which is connected upstream of the thermolysis reactor (10) in the flow direction. As a result of the exothermic reactions taking place in the oxidation catalytic converter (30), it is possible for heating of the thermolysis reactor (10) to take place. In order to further increase the temperature, it is possible for fuel to be injected into the oxidation reactor (30) by means of a fuel supply device. The fuel is burned catalytically in the oxidation catalytic converter (30).
摘要（中）：

用于还原内燃机废气中的氮氧化物的装置具有热解反应器（10）。 在热解反应器（10）中，通过加热将尿素转化成氨和异氰酸。 在本发明的一个优选实施方案中，热解反应器（10）设置在排气管道（26）内并与氧化催化转化器（30）热耦合，氧化催化转化器（30）连接在热解反应器（10）的上游 方向。 由于在氧化催化转化器（30）中发生放热反应的结果，可以对热解反应器（10）进行加热。 为了进一步提高温度，可以通过燃料供给装置将燃料注入氧化反应器（30）。 燃料在氧化催化转化器（30）中催化燃烧。

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