The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 26, 2011
Filed:
Nov. 17, 2008
Rolf Brück, Bergisch Gladbach, DE;
Marc Brugger, Neunkirchen, DE;
Thomas Härig, Neunkirchen-Seelscheid, DE;
Peter Hirth, Rösrath, DE;
Ulf Klein, Neunkirchen-Seelscheid, DE;
Rolf Brück, Bergisch Gladbach, DE;
Marc Brugger, Neunkirchen, DE;
Thomas Härig, Neunkirchen-Seelscheid, DE;
Peter Hirth, Rösrath, DE;
Ulf Klein, Neunkirchen-Seelscheid, DE;
Emitec Gesellschaft fuer Emissionstechnologie mbH, Lohmar, DE;
Abstract
A device and a method for providing a gaseous substance mixture including at least one of a reducing agent and/or a reducing agent precursor, include a reservoir for an aqueous solution including at least one reducing agent precursor, from which the aqueous solution can be delivered into at least one metering line having a dispensing opening by a delivery device, and a device for heating the metering line above a critical temperature greater than the boiling temperature of water. Complete evaporation of an aqueous solution including urea and subsequent hydrolysis to form a substance mixture including ammonia, are carried out. The substance mixture is metered as a reducing agent into an SCR catalytic converter. Carrying out the evaporation outside the exhaust system uses considerably smaller hydrolysis catalytic converters, which is space-saving and cost-saving compared to conventional devices for providing a reducing agent for selective catalytic reduction of nitrogen oxides.