Title:
EXHAUST GAS PURIFICATION CATALYST AND EXHAUST GAS PURIFYING METHOD USING THE SAME
Document Type and Number:
Japanese Patent JP2015044194
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an exhaust gas purification catalyst capable of efficiently removing especially NOx of CO, HC and NOx which are harmful components contained in an exhaust gas.SOLUTION: There is provided an exhaust gas purification catalyst which contains a thin plate-like ceria (CeO) having an average diameter equivalent to a circle of a planar direction of 2 to 50 μm and an average thickness of 0.01 to 1 μm as a catalyst active component and further contains a fire-resistant inorganic oxide, an oxide of at least one element selected from an alkali metal, am alkali earth metal, a rare earth element, manganese, tungsten and a noble metal. An exhaust gas purification catalyst containing a thin plate-like ceria (CeO) occludes NOx in an oxidizing atmosphere and releases and reduces NOx in a reducing atmosphere, which can be used as a so-called NOx trap catalyst.
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Inventors:
ONO MARIKO
OKUMURA AKIHISA
OKUMURA AKIHISA
Application Number:
JP2014209888A
Publication Date:
March 12, 2015
Filing Date:
October 14, 2014
Export Citation:
Assignee:
UMICORE SHOKUBAI JAPAN CO LTD
UMICORE SHOKUBAI USA INC
UMICORE SHOKUBAI USA INC
International Classes:
B01J23/58; B01D53/94; B01J35/02; B01J37/02; B01J37/08; C01F17/235; F01N3/08; F01N3/10; F01N3/20; F01N3/28
Domestic Patent References:
| JP2007217265A | 2007-08-30 | |||
| JP2007275878A | 2007-10-25 | |||
| JPH07172826A | 1995-07-11 | |||
| JP5679298B2 | 2015-03-04 |
Attorney, Agent or Firm:
Hatta international patent business corporation