Power plants – Internal combustion engine with treatment or handling of... – By means producing a chemical reaction of a component of the...
Reexamination Certificate
2007-08-20
2010-12-14
Tran, Binh Q. (Department: 3748)
Power plants
Internal combustion engine with treatment or handling of...
By means producing a chemical reaction of a component of the...
C060S274000, C060S295000, C060S301000, C060S303000
Reexamination Certificate
active
07849676
ABSTRACT:
A method for adding at least one, in particular liquid, reactant, to an exhaust gas stream of an internal combustion engine includes adding a reactant flow to the stream downstream of an element provided for an at least partial conversion and/or at least partial elimination of at least one component of the stream, so that at least part of the reactant flow impinges on the element. This achieves rapid evaporation of the reactant flow. Impinging on the element, which is hot during operation, i.e. at temperatures of 400° C. and more, causes rapid evaporation and, because of a preferably porous coating of the element, take-up of the reactant solution into the element with successive evaporation. Urea, in particular, can be evaporated quickly, effectively and virtually completely upon introduction into an exhaust system as a reducing agent for selective catalytic reduction of nitrogen oxides, in particular in a downstream SCR catalytic converter.
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European Search Report dated Apr. 3, 2009.
Emitec Gesellschaft fuer Emissions-technologie mbH
Greenberg Laurence A.
Locher Ralph E.
Stemer Werner H.
Tran Binh Q.
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