| 摘要 |
This invention relates to a process for reducing the ignition temperature of diesel soot. The process comprises contacting a hot exhaust from a diesel engine, which exhaust contains diesel soot, with a catalytic composite. The composite comprises a particulate filter coated with a sulfur resistant refractory inorganic oxide selected from the group consisting of titania, zirconia, silica, silica-alumina and alumina which has been treated to be sulfur resistant, i.e. alumina treated with titania, zirconia, tungsten oxide, etc. This coated ceramic trap has deposited thereon at least one catalytic element or compound selected from the group consisting of Pt, Pd, and Rh.
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