Patent ID: 8293197
Filing Date: 2012-10-23
Classification: B01D,F01N,F23J,Y02T

Abstract:
1. A system for reducing nitrogen oxides from an exhaust fluid, the system comprising: an exhaust source configured to produce an exhaust stream comprising nitrogen oxides; a hydrocarbon reductant source; a first injector in fluid communication with the hydrocarbon reductant source, wherein the first injector is positioned to receive a first hydrocarbon reductant stream from the hydrocarbon reductant source, and to expel the first portion of the hydrocarbon reductant stream; a first catalyst disposed to receive the exhaust stream and further disposed to receive the first hydrocarbon reductant stream from the first injector; a second injector in fluid communication with the hydrocarbon reductant source, wherein the second injector is positioned to receive a second hydrocarbon reductant stream from the hydrocarbon reductant source, and to expel the second hydrocarbon reductant stream; and a second catalyst disposed to receive an effluent from the first catalyst and further disposed to receive the second portion of the hydrocarbon reductant stream from the second injector.