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Title:
CATALYST FOR EXHAUST GAS CLEAN-UP
Document Type and Number:
WIPO Patent Application WO/2007/072690
Kind Code:
A1
Abstract:
Disclosed is a catalyst for use in the exhaust gas clean-up, which comprises a composite oxide catalyst and a heat-resistant carrier and is less likely to be reduced in activity even when used in a high-temperature, high-oxygen-level atmosphere. The catalyst comprises a composite oxide catalyst and a heat-resistant carrier supporting the composite oxide catalyst thereon. The composite oxide catalyst comprises a rare earth element, an alkali earth element and a noble metal, wherein a part of the rare earth element and a part of the alkali earth element together form a composite oxide and the composite oxide and a part of the noble metal together form a solid solution. The heat-resistant carrier comprises at least one composite oxide selected from the group consisting of a first composite oxide represented by the general formula: AB2O4, a second composite oxide having a perobskite structure and represented by the general formula: LMO3, and a third composite oxide having a pyrochlore structure and represented by the general formula: X2Y2O7.

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Inventors:
MATSUEDA SATOSHI (JP)
KIMURA MAREO (JP)
NARITA KEIICHI (JP)
Application Number:
PCT/JP2006/324460
Publication Date:
June 28, 2007
Filing Date:
December 07, 2006
Export Citation:
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Assignee:
CATALER CORP (JP)
MATSUEDA SATOSHI (JP)
KIMURA MAREO (JP)
NARITA KEIICHI (JP)
International Classes:
B01J23/58; B01D53/94; B01J32/00; F01N3/10
Foreign References:
JPH01168343A1989-07-03
JPH04371229A1992-12-24
JPH0699069A1994-04-12
JP2004290723A2004-10-21
JP2001000863A2001-01-09
JPH05220395A1993-08-31
US4921829A1990-05-01
Other References:
See also references of EP 1964607A4
Attorney, Agent or Firm:
SUZUYE, Takehiko et al. (1-12-9 Toranomo, Minato-ku Tokyo 01, JP)
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