| abstract |
The present disclosure generally provides an exhaust treatment system for at least partial conversion of gaseous CO emissions. The exhaust gas treatment system comprises a first catalyst component selected from various components, for example LNT or oxidation catalysts for the reduction of HC and CO, which comprises a platinum group impregnated with refractory oxide material It contains a catalyst composition such as a metal component. Another component in the exhaust gas treatment system is the SCR catalyst for NOx reduction, which contains a catalyst composition such as metal ion exchanged molecular sieves and the first catalyst component is LNT In the case, it may not exist arbitrarily. A second oxidation catalyst for further reduction of CO is also part of the emissions treatment system and is selected from platinum group metal components, base metal oxide components, or combinations thereof disposed on a carrier substrate A third catalyst composition is included. |