| 简介 |
An exhaust system for a compression ignition engine comprises an oxidation catalyst for treating carbon monoxide (CO) and hydrocarbons (HCs) in exhaust gas from the compression ignition engine, wherein the oxidation catalyst comprises : a platinum group metal (PGM) component selected from the group consisting of a platinum (Pt) component, a palladium (Pd) component and a combination thereof; an alkaline earth metal component; a support material comprising a modified alumina incorporating a heteroatom component; and a substrate, wherein the platinum group metal (PGM) component, the alkaline earth metal component and the support material are disposed on the substrate. The alkaline earth component may be present in the amount of 10-500 gft-3 (0.35-17.7 kgm-3). The heteroatom component may be silicon, magnesium, barium, lanthanum, cerium, titanium, titanium, zirconium or a combination of two or more of the above. |
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