Title:
EXHAUST GAS PURIFYING CATALYST AND METHOD FOR PRODUCING SAME
Document Type and Number:
WIPO Patent Application WO/2014/024312
Kind Code:
A1
Abstract:
Provided is an exhaust gas purifying catalyst which does not essentially contain a noble metal or is reduced in the amount of a noble metal, while being capable of substantially maintaining the removal performance of unreacted materials such as CO in an exhaust gas even in a low temperature environment after exposure to a high temperature of 900°C or more.
An exhaust gas purifying catalyst which is obtained by having a carrier that has an oxygen absorbing/desorbing ability support a solid material that is formed of M (that is a metal element selected from among Cu, Mn, Ni, Fe, Mg and Ag), Co and O, with a thin layer that contains Al and O interposed therebetween. A method for producing the catalyst, which comprises a step wherein the surface of a carrier that has an oxygen absorbing/desorbing ability is covered with a precursor for providing a thin layer that contains Al and O, and a precursor of a solid material that is formed of M (that is a metal element selected from among Cu, Mn, Ni, Fe, Mg and Ag), Co and O is deposited thereon, said precursor of the solid material being produced from an acid salt of Co and an acid salt of the metal M.
Inventors:
NITTA IWAO (JP)
SAWADA NAOTAKA (JP)
SAWADA NAOTAKA (JP)
Application Number:
PCT/JP2012/070523
Publication Date:
February 13, 2014
Filing Date:
August 10, 2012
Export Citation:
Assignee:
TOYOTA MOTOR CO LTD (JP)
NITTA IWAO (JP)
SAWADA NAOTAKA (JP)
NITTA IWAO (JP)
SAWADA NAOTAKA (JP)
International Classes:
B01J23/75; B01D53/94; B01J23/889; B01J23/89
Foreign References:
| JP2004337840A | 2004-12-02 | |||
| JP2009087944A | 2009-04-23 | |||
| JPS637841A | 1988-01-13 | |||
| JP2011045840A | 2011-03-10 | |||
| JPS50127887A | 1975-10-08 | |||
| JPS50104193A | 1975-08-16 | |||
| JPS6233540A | 1987-02-13 | |||
| JPS5610333A | 1981-02-02 |
Other References:
HOSSEINI, S.A. ET AL.: "Nanocrystalline AMn204 (A=Co, Ni, Cu) spinels for remediation of volatile organic compounds-synthesis, characterization and catalytic performance", CERAM. INT., vol. 38, no. 2, 15 October 2011 (2011-10-15), pages 1655 - 1661
STOYANOVA, D. ET AL.: "Copper-cobalt oxide spinel supported on high-temperature aluminosilicate carriers as catalyst for CO-02 and CO-NO reactions", APPL. CATAL. B ENVIRON., vol. 17, no. 3, 13 July 1998 (1998-07-13), pages 233 - 244
KAKIHANA, M. ET AL.: "Synthesis and Characteristics of Complex Multicomponent Oxides Prepared by Polymer Complex Method", BULL. CHEM. SOC. JPN., vol. 72, no. 7, 15 July 1999 (1999-07-15), pages 1427 - 1443
STOYANOVA, D. ET AL.: "Copper-cobalt oxide spinel supported on high-temperature aluminosilicate carriers as catalyst for CO-02 and CO-NO reactions", APPL. CATAL. B ENVIRON., vol. 17, no. 3, 13 July 1998 (1998-07-13), pages 233 - 244
KAKIHANA, M. ET AL.: "Synthesis and Characteristics of Complex Multicomponent Oxides Prepared by Polymer Complex Method", BULL. CHEM. SOC. JPN., vol. 72, no. 7, 15 July 1999 (1999-07-15), pages 1427 - 1443
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
Aoki 篤 (JP)
Aoki 篤 (JP)
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