发明名称 |
EXHAUST-GAS PURIFICATION CATALYTIC SYSTEM |
摘要 |
A Rh-including catalyst layer of an upstream catalyst 3 includes Rh-doped CeZr-based mixed oxide and Rh-loading CeZr-based mixed oxide as oxygen storage/release materials. A Rh-including catalyst layer of a downstream catalyst 5 includes only Rh-doped CeZr-based mixed oxide as an oxygen storage/release material. The content of the oxygen storage/release materials included in the Rh-including catalyst layer of the upstream catalyst 3 is smaller than that of the downstream catalyst 5. The Rh-doped CeZr-based mixed oxide of the upstream catalyst 3 shows a particle size distribution having a peak particle size smaller than that of the Rh-doped CeZr-based mixed oxide of the downstream catalyst 5.
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申请公布号 |
US2012189503(A1) |
申请公布日期 |
2012.07.26 |
申请号 |
US201213353266 |
申请日期 |
2012.01.18 |
申请人 |
AKAMINE MASAAKI;SHIGETSU MASAHIKO;MAZDA MOTOR CORPORATION |
发明人 |
AKAMINE MASAAKI;SHIGETSU MASAHIKO |
分类号 |
B01D53/94 |
主分类号 |
B01D53/94 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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