Exhaust gas aftertreatment
AssigneeFraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.
InventorsRobert Szolak, Alexander Susdorf, Florian Rümmele
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Abstract
A method for exhaust gas aftertreatment is provided, the method comprising: a) providing a nitrogen oxide-containing raw exhaust gas, b) introducing the nitrogen oxide-containing raw exhaust gas into a catalytic evaporator (1), c) introducing a urea solution and a fuel into the catalytic evaporator (1), as a result of which a reducing agent is obtained, and d) supplying the reducing agent to an exhaust gas aftertreatment system (8). Alternatively or in addition, a device for producing a reducing agent may be provided, a reducing agent produced with same, and the use of these objects.
Claims14
A method for exhaust gas aftertreatment, comprising at least the steps of:
- a) providing a nitrogen oxide-containing raw exhaust gas,
- b) introducing the nitrogen oxide-containing raw exhaust gas into a catalytic evaporator,
- c) introducing a urea solution and a fuel simultaneously into the catalytic evaporator, as a result of which a reducing agent is obtained, and
- d) supplying the reducing agent to an exhaust gas aftertreatment system.
A device for producing a reducing agent for exhaust gas aftertreatment, the device comprising:
- a) a catalytic evaporator,
- b) a raw exhaust gas supply line to the catalytic evaporator, being adapted to introduce nitrogen oxide-containing raw exhaust gas into the catalytic evaporator,
- c1) a fuel supply line to the catalytic evaporator, being adapted to supply fuel into the catalytic evaporator, and a urea supply line to the catalytic evaporator, being adapted to simultaneously introduce a urea solution into the catalytic evaporator,
- d) a line configured to introduce the resulting reducing agent into an exhaust gas system of an engine or into an exhaust gas aftertreatment system.
A device for producing a reducing agent for exhaust gas aftertreatment, the device comprising:
- a) a catalytic evaporator,
- b) a raw exhaust gas supply line to the catalytic evaporator, being adapted to introduce nitrogen oxide-containing raw exhaust gas into the catalytic evaporator,
- c2) a supply line being adapted to introduce a mixture, comprising of urea and fuel, into the catalytic evaporator, and
- d) a line configured to introduce the resulting reducing agent into an exhaust gas system of an engine or into an exhaust gas aftertreatment system.
Dependencies are inferred from the claim text.