PARTICULATE OXIDIZING AGENT AND OXIDATION CATALYST

Title:

PARTICULATE OXIDIZING AGENT AND OXIDATION CATALYST

Document Type and Number:

Japanese Patent JP3528839

Kind Code:

B2

Abstract:

PROBLEM TO BE SOLVED: To provide a particulate oxidizing agent which enhances the oxidation rate of particulate at a low temperature (approximately 300°C or lower) and does not hinder removal of NOx by reduction at a high temperature (approximately 500°C or higher) by the above oxidation.
SOLUTION: The particulate oxidizing agent comprises a cerium/zirconium composite oxide for burning and removing particulate in an exhaust gas in a lean combustion-type internal combustion engine. The particulate oxidizing agent contains cerium of 0.1-20 mol% based on the number of total moles of metal atoms contained. Preferably the cerium/zirconium composite oxide contains further at least one kind of metal (M) selected from rare earth metals (except cerium), and the molar ratio of M/Ce is 0.1-10.

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Inventors:

Yoshida, Kohei
Takeshima, Shinichi

Application Number:

JP2002140317A

Publication Date:

May 24, 2004

Filing Date:

May 15, 2002

Export Citation:

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Assignee:

TOYOTA MOTOR CORP

International Classes:

F01N3/08; B01D53/94; B01J21/06; B01J23/10; B01J23/58; B01J23/63; B01J37/02; C01G25/00; C04B35/486; C04B35/50; F01N3/10; F01N3/24; F01N3/28; B01J23/00; (IPC1-7): B01J23/63; B01D53/94; B01J23/58; F01N3/08; F01N3/10; F01N3/24; F01N3/28

Attorney, Agent or Firm:

石田敬（外３名）

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