Patent ID: 7678352
Filing Date: 2010-03-16
Classification: B01D,F01N,Y02A,Y02T

Abstract:
1. A device to produce ammonia as a reducing agent for a selective catalytic reduction (SCR) of nitrogen oxides in an exhaust gas of a combustion source, the device comprising: a reactor comprising a nitrogen oxide production unit configured to produce nitrogen oxide connected in series with a hydrogen production unit configured to produce hydrogen, wherein the reactor is separated from the combustion source and its exhaust gas duct, and wherein the nitrogen oxide and hydrogen are produced in alternating first and second operational phases; and a storage catalytic converter connected in series with the reactor for storage of the nitrogen oxide and formation of ammonia; wherein the nitrogen oxide produced in the nitrogen oxide production unit and the hydrogen produced in the hydrogen production unit are delivered to and converted to ammonia in the storage catalytic converter, and wherein the ammonia is admixed with the exhaust gas in the direction of flow in front of a SCR-catalytic converter.