Patent ID: 6805849
Filing Date: 2004-10-19
Classification: B01D,B01J,F01N,Y02A,Y02T

Abstract:
An SCR system for treating combustion exhaust gas containing NOx and particulates, comprising an oxidation catalyst effective to convert at least a portion of NO in said NOx to NO2 thereby enhancing NO2 content of the exhaust gas, a particulate trap, wherein said particulate trap is located downstream of said oxidation catalyst, a source of reductant fluid, wherein said reductant fluid is NH3 or urea, an injection means for said reductant fluid located downstream of said particulate trap and an SCR catalyst, wherein said SCR catalyst is located downstream of said injection means and wherein the SCR catalyst comprises a V2O5/WO3/TiO2 catalyst, supported on a through-flow honeycomb support.