发明名称 |
EXHAUST GAS PURIFYING DEVICE AND METHOD, EXHAUST GAS PURIFYING CATALYST AND PRODUCTION METHOD FOR EXHAUST GAS PURIFYING CATALYST |
摘要 |
A catalyst (25) for lowering NOx concentration in an exhaust gas is disposed in an exhaust gas passage (22) of an engine (1). The catalyst (25) is composed of a catalyst layer (25b) formed on a substrate (25a). A NOx absorber that absorbs NOx when an oxygen concentration in the exhaust gas is high and releases NOx when the oxygen concentration drops, and a precious metal for reducing NOx are supported on a support material as catalyst components, and the NOx absorber includes Ba, K, Sr, and Mg. By lowering the oxygen concentration in the exhaust gas and raising a temperature of the NOx absorber when sulfur component is absorbed excessively in the NOx absorber, it is possible to regenerate the catalyst from the S poisoning. <IMAGE> |
申请公布号 |
EP1201302(A4) |
申请公布日期 |
2006.03.15 |
申请号 |
EP20000966542 |
申请日期 |
2000.10.17 |
申请人 |
MAZDA MOTOR CORPORATION |
发明人 |
MIYOSHI, SEIJI,;TAKAMI, AKIHIDE,;KYOUGOKU, MAKOTO,;YAMADA, HIROSHI,;OKAMOTO, KENJI,;YAMAMOTO, KENICHI,;KOODA, YUKI, |
分类号 |
B01D53/94;B01J23/10;B01J23/58;B01J23/63;B01J37/02;F01N3/08;F02D41/02 |
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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