SYSTEMS AND METHODS FOR USING COPPER-MANGANESE SPINEL AS ACTIVE PHASE FOR DIESEL OXIDATION APPLICATIONS

摘要

A diesel oxidation catalyst (DOC) system for the treatment of exhaust gas emissions, including oxidation of nitrogen oxides (NO), unburned hydrocarbons (HC), and carbon monoxide (CO) is disclosed. Fresh and hydrothermally aged Zero-PGM (ZPGM) DOC samples are prepared and configured with an alumina-based washcoat on ceramic substrate, overcoat including doped Zirconia support oxide, and impregnation layer of Cu-Mn spinel of selected base metal loadings. Testing of fresh and hydrothermally aged ZPGM DOC system samples including Cu-Mn spinel is developed to evaluate the performance of Cu-Mn spinel active phase in oxidation CO, HC, and NO, as well as production of NO2. Key to improvement in light-off performance and NO oxidation is to have a diesel oxidation catalyst that is substantially PGM-free and available for a plurality of applications in lean burn engine operations.