Patent ID: 6442933
Filing Date: 2002-09-03
Classification: F01N,Y02T

Abstract:
A device for catalytic removal of a pollutant from an exhaust gas of a combustion system, comprising:an exhaust-gas duct for carrying exhaust gas; a reagent; a muffler having an injection space and a mixing space for mixing said reagent with the exhaust gas; an injection device for introducing said reagent into the exhaust gas in said injection space; at least one catalytic converter disposed in said exhaust-gas duct; mixers disposed at least one of before and after said injection space with respect to a direction of flow of the exhaust gas, said mixers defining a distance therebetween, said distance matched to a frequency of sound to be damped in the exhaust gas; and at least one of said injection space and said mixing space being lined with at least one of a group consisting of a perforated plate, a thin, flexible single-layer plate, and a thin, flexible double-layer plate.