Title:
CATALYST FOR HYDROGEN GENERATION AND CATALYST FOR PURIFICATION OF EXHAUST GAS
Document Type and Number:
WIPO Patent Application WO/2002/066153
Kind Code:
A1
Abstract:
Catalyts of the NO¿x? occlusion/reduction type, including a hydrogen generation catalyst, which comprise a support comprising an Al¿2?O¿3?/ZrO¿2? composite oxide and rhodium supported thereon. Since the Al¿2?O¿3?/ZrO¿2? composite oxide has a lower basicity than ZrO¿2?, SO¿x? is less apt to approach it and hence the poisoning of the rhodium by sulfur can be inhibited. The Al¿2?O¿3?/ZrO¿2? composite oxide has higher heat resistance than ZrO¿2? and functions to improve the activity of the rhodium in steam reforming reactions like ZrO¿2?. The NO¿x? occlusion/reduction catalysts hence have the improved ability to remove NO¿x? after a durability test.
Inventors:
HARA NAOYUKI (JP)
HACHISUKA ICHIRO (JP)
HACHISUKA ICHIRO (JP)
Application Number:
PCT/JP2002/000901
Publication Date:
August 29, 2002
Filing Date:
February 04, 2002
Export Citation:
Assignee:
TOYOTA MOTOR CO LTD (JP)
HARA NAOYUKI (JP)
HACHISUKA ICHIRO (JP)
HARA NAOYUKI (JP)
HACHISUKA ICHIRO (JP)
International Classes:
B01D53/86; B01D53/94; B01J21/04; B01J21/06; B01J23/40; B01J23/46; B01J23/58; C01B3/40; F01N3/08; B01J35/00; B01J37/03; (IPC1-7): B01J23/46; B01J23/58; B01D53/94
Foreign References:
| EP0852966A1 | 1998-07-15 | |||
| JPH05168924A | 1993-07-02 | |||
| JPH10356A | 1998-01-06 | |||
| JP2000189798A | 2000-07-11 | |||
| EP0707882A1 | 1996-04-24 | |||
| EP0992276A1 | 2000-04-12 |
Other References:
See also references of EP 1371415A4
Attorney, Agent or Firm:
Ohkawa, Hiroshi (Aichi, Aichi, JP)
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