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MULTI-REGION TWC CATALYSTS FOR GASOLINE ENGINE EXHAUST GAS TREATMENTS WITH IMPROVED H2S ATTENUATION
MULTI-REGION TWC CATALYSTS FOR GASOLINE ENGINE EXHAUST GAS TREATMENTS WITH IMPROVED H2S ATTENUATION
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机译:用于汽油发动机废气处理的多区域TWC催化剂,具有改善的H2S衰减
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摘要
A catalyst article for treating exhaust gas from a gasoline engine comprising: a substrate comprising an inlet end, an outlet end with an axial length L; a first catalytic region beginning at the inlet end and extending for less than the axial length L, wherein the first catalytic region comprises a first PGM component and a first inorganic oxide; a second catalytic region beginning at the outlet end, wherein the second catalytic region comprises a second PGM component, a second oxygen storage capacity (OSC) material, and a second inorganic oxide; wherein the first catalytic region is substantially free of ceria; and wherein the first PGM component is palladium (Pd), platinum (Pt) or a combination thereof.
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