首页>
外国专利>
NOVEL MULTI-REGION TWC CATALYSTS FOR GASOLINE ENGINE EXHAUST GAS TREATMENTS
NOVEL MULTI-REGION TWC CATALYSTS FOR GASOLINE ENGINE EXHAUST GAS TREATMENTS
展开▼
机译:用于汽油发动机废气处理的新型多区域TWC催化剂
展开▼
页面导航
摘要
著录项
相似文献
摘要
A catalytic article for treating exhaust gas comprising: 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 palladium component and a first oxygen storage capacity (OSC) material comprising ceria; a second catalytic region beginning at the outlet end and extending for less than the axial length L, wherein the second catalytic region comprises a second palladium component and a second OSC material comprising ceria; a third catalytic region beginning at the outlet end and extending for less than the axial length L, wherein the third catalytic region comprises a third rhodium component and a third OSC material comprising ceria; wherein at least a portion of the first catalytic region is not covered by the second catalytic region and/or the third catalytic region;;and wherein (a) the ceria amount in the first catalytic region is less than 50% of the total ceria amount in the first, second, and third catalytic regions; or (b) the ceria loading in the first catalytic region is less than 50% of the sum of the ceria loading in the first, second, and third catalytic regions.
展开▼