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Title:
CATALYST FOR PURIFYING EXHAUST GAS
Document Type and Number:
WIPO Patent Application WO/2020/195777
Kind Code:
A1
Abstract:
The present invention provides a catalyst for purifying exhaust gas, the catalyst having exceptional performance in purifying chemically stable methane. The catalyst 5 for purifying exhaust gas according to the present invention comprises a substrate 10 that divides cells 12 through which exhaust gas flows, and a catalyst layer 20 provided to the surface of the substrate 10. The catalyst layer 20 includes: a palladium layer 21 that includes palladium and is extended from a first end part 10a, which is an end part of the cells 12 at which the exhaust gas is introduced, toward a second end part 10b, which is an end part from which the exhaust gas is discharged; a platinum layer 22 that includes platinum and is extended from the second end part 10b toward the first end part 10a; and a rhodium layer 23 that includes rhodium and is layered on the palladium layer 21 and the platinum layer 22.

Inventors:
NOGUCHI TAKAHIRO (JP)
ONOE RYOTA (JP)
TASAKI RYO (JP)
IWAI MOMOKO (JP)
MATSUSHITA YAMATO (JP)
Application Number:
PCT/JP2020/010229
Publication Date:
October 01, 2020
Filing Date:
March 10, 2020
Export Citation:
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Assignee:
CATALER CORP (JP)
International Classes:
B01J35/04; B01D53/94; B01J23/63; F01N3/10; F01N3/28
Domestic Patent References:
WO2015087872A12015-06-18
WO2017204008A12017-11-30
WO2014195685A12014-12-11
WO1998020238A11998-05-14
WO2014195685A12014-12-11
WO1998020238A11998-05-14
WO1998020238A11998-05-14
WO2014195685A12014-12-11
Foreign References:
JP2010029752A2010-02-12
JPH0957098A1997-03-04
JP2010179204A2010-08-19
JP2001079402A2001-03-27
JP2013119075A2013-06-17
JP2015006660A2015-01-15
JP2019061779A2019-04-18
JP2011255378A2011-12-22
JPS5941706A1984-03-08
JP2010005590A2010-01-14
JP2017104823A2017-06-15
EP1952884A12008-08-06
JP2003251200A2003-09-09
JP2004000838A2004-01-08
JP2008175118A2008-07-31
JP2002166172A2002-06-11
JP2011235264A2011-11-24
JP2018159380A2018-10-11
JP2004000838A2004-01-08
JP2008175118A2008-07-31
JP2002166172A2002-06-11
JP2011235264A2011-11-24
JP2018159380A2018-10-11
JP2010005590A2010-01-14
JP2017104823A2017-06-15
EP1952884A12008-08-06
JP2003251200A2003-09-09
JP2010005590A2010-01-14
JP2017104823A2017-06-15
EP1952884A12008-08-06
JP2003251200A2003-09-09
JP2004000838A2004-01-08
JP2008175118A2008-07-31
JP2002166172A2002-06-11
JP2011235264A2011-11-24
JP2018159380A2018-10-11
Other References:
PARK PYONG-WAN, SE-JONG YOO, CHAN JEONG: "Evaluation of 3 Way Catalytic Converters for the Reduction of CH4 in the Exhaust Stream of a CNG Fueled Vehicle", SAE TECHNICAL PAPER SERIES, 15 November 1993 (1993-11-15), pages 1 - 10, XP093092843
PARK PYONG-WAN, SE-JONG YOO, CHAN JEONG: "Evaluation of 3 Way Catalytic Converters for the Reduction of CH4 in the Exhaust Stream of a CNG Fueled Vehicle", SAE TECHNICAL PAPER SERIES, 15 November 1993 (1993-11-15), pages 1 - 10, XP093092843
PARK PYONG-WAN, SE-JONG YOO, CHAN JEONG: "Evaluation of 3 Way Catalytic Converters for the Reduction of CH4 in the Exhaust Stream of a CNG Fueled Vehicle", SAE TECHNICAL PAPER SERIES, 15 November 1993 (1993-11-15), pages 1 - 10, XP093092843
See also references of EP 3925701A4
Attorney, Agent or Firm:
ABE, Makoto (JP)
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