发明名称 |
Exhaust gas cleaner and method for cleaning same |
摘要 |
Nitrogen oxides are efficiently removed from an exhaust gas containing nitrogen oxides and an excess amount of oxygen, by (i) disposing an exhaust gas cleaner in a flow path of the exhaust gas, the exhaust gas cleaner comprising a first catalyst comprising 0.2-15 weight % (on a metal basis) of at least one silver salt selected from the group consisting of silver halides, silver sulfate and silver phosphate supported on a porous inorganic oxide on an inlet side and a second catalyst comprising (a) 0.2-15 weight % (on a metal basis) of at least one silver salt selected from the group consisting of silver halides, silver sulfate and silver phosphate and (b) up to 2 weight % (on a metal basis) of copper or copper oxide supported on a porous inorganic oxide on an outlet side; (ii) introducing at least one reducing agent selected from hydrocarbons and oxygen-containing organic compounds into the exhaust gas on an upstream side of the exhaust gas cleaner; and (iii) bringing the exhaust gas into contact with the exhaust gas cleaner at a temperature of 200 DEG -600 DEG C.
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申请公布号 |
US5658542(A) |
申请公布日期 |
1997.08.19 |
申请号 |
US19940340329 |
申请日期 |
1994.11.14 |
申请人 |
KABUSHIKI KAISHA RIKEN |
发明人 |
YOSHIDA, KIYOHIDE;MURAMATSU, GYO;ABE, AKIRA;IRITE, NAOKO |
分类号 |
B01D53/94;B01J23/89;B01J35/00;F01N3/20;(IPC1-7):B01D53/92;B01D53/56 |
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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