| 摘要 |
The invention relates to a device (1) for processing waste gas (2) of an internal combustion engine, comprising at least one supply line (4) for supplying an aqueous solution, a hydrolysis catalyst (5) that is connected to the supply line (4), and a SCR-catalyst (7). The SCR catalyst (7) can be cross-flown by waste gas (2). The invention is characterised in that at least one rod-shaped heating element (9), which can heat at least one of the following components, is provided: a) at least parts of the supply line (4) and b) the hydrolysis catalyst. The inventive device (1) enables a supply line (4) that is heated by the rod-shaped element (9) to be formed in a compact manner, as well as a corresponding hydrolysis catalyst (5) which can evaporate an aqueous solution comprising urea, and subsequently can be hydrolysed to form a gas flow (22) containing ammonia. Said gas flow (22) is used as a reducing agent in the SCR process. The compact arrangement allows installation even with limited available space. Due to the fact that the hydrolysis catalyst (5) is not cross-flown by the waste gas, the volume of said hydrolysis catalyst (5) can be decisively reduced, thereby a clearly smaller mass flow must be hydrolysed to gas.
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