发明名称 |
Device for purifying exhaust gas, method for purifying exhaust gas, catalyst for purifying exhaust gas, and method for manufacturing exhaust gas purifying catalyst |
摘要 |
A catalyst for lowering NOx concentration in an exhaust gas is disposed in an exhaust gas passage of an engine. The catalyst composed of a catalyst layer formed on a substrate. 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.
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申请公布号 |
US6562753(B2) |
申请公布日期 |
2003.05.13 |
申请号 |
US20010982995 |
申请日期 |
2001.10.22 |
申请人 |
MADZA 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;(IPC1-7):B01J21/10;B01J23/02 |
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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