Invention Grant
- Patent Title: Method of manufacturing catalyst for cleaning exhaust gas released from internal combustion engine, and catalyst for the same
- Patent Title (中): 制造从内燃机排出的废气的催化剂的制造方法及其催化剂
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Application No.: US943151Application Date: 1997-10-03
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Publication No.: US5972828APublication Date: 1999-10-26
- Inventor: Ryouta Doi , Hidehiro Iizuka , Hiroshi Hanaoka , Toshio Ogawa , Osamu Kuroda , Hisao Yamashita , Yuichi Kitahara , Toshifumi Hiratsuka
- Applicant: Ryouta Doi , Hidehiro Iizuka , Hiroshi Hanaoka , Toshio Ogawa , Osamu Kuroda , Hisao Yamashita , Yuichi Kitahara , Toshifumi Hiratsuka
- Applicant Address: JPX Tokyo
- Assignee: Hitachi, Ltd.
- Current Assignee: Hitachi, Ltd.
- Current Assignee Address: JPX Tokyo
- Priority: JPX8-26747 19961003
- Main IPC: B01D53/94
- IPC: B01D53/94 ; B01J23/02 ; B01J23/54 ; B01J23/58 ; B01J23/63 ; B01J33/00 ; B01J23/10
Abstract:
In order to remove nitrogen oxide in an exhaust gas released from a lean burn engine, a catalyst: supporting an rare earth metal, an alkali earth metal, titanium, a noble metal, and magnesium on the surface of a porous carrier made of inorganic oxides is provided. In order to manufacture the catalyst, the rare earth metal is supported onto the surface of the carrier first, subsequently the alkali earth metal other than magnesium and titanium are supported, the noble metal is supported, and magnesium is supported finally onto the surface of the carrier.The catalyst of the present invention is scarcely poisoned by SOx in the exhaust gas released from the lean burn engine, and has a heat resistivity durable against high speed driving.
Public/Granted literature
- US5313247A Flash device Public/Granted day:1994-05-17
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