reduced combustion emissions using multicomponent metal combustion catalyst and lightly catalyzed diesel particulate filter

摘要

REDUCED COMBUSTION EMISSIONS USING MULTI-COMPONENT METAL COMBUSTION CATALYST AND SLIGHTLY CATALYZED DIESEL PARTICLE FILTER. An improved robust diesel emission control system employs a lightly diesel particulate filter (DPF), preferably with a fuel loaded catalyst (FBC) containing platinum in the fuel. The DPF is preferably of wire mesh construction and at least partially slightly catalyzed with precious metal catalysts, for example platinum group metal having a metal loading of about 106 to 530 grams per cubic meter (3 to 15 grams per cubic foot) to minimize the formation of NO2 in the exhaust gas. Preferred levels of fuel laden catalyst will be low, for example, from 0.05 to 0.5 ppm platinum and 3 to 8 ppm cerium and / or iron, thereby providing effective engine emission reductions without emitting amounts. NO2 to the atmosphere.