EXHAUST-GAS PURIFICATION APPARATUS AND METHOD FOR MANUFACTURING SAME

WIPO Patent Application WO/2020/105545

A1

An exhaust-gas purification apparatus 10 according to the present invention comprises: a honeycomb base material including a plurality of exhaust-gas flow paths 2 partitioned by a porous wall 1; and one or more catalyst noble metals carried by the honeycomb base material. The honeycomb base material includes ceria-zirconia composite oxide particles as one component. The catalyst noble metals are selected from the group consisting of platinum, palladium, and rhodium. The honeycomb base material has a noble metal concentrated surface section in which a 50%-by-mass noble metal carry depth for a specific noble metal that is one type among the one or two catalyst noble metals is less than 50% of the distance from the surface of the porous wall to the center of the inside of the porous wall. The 50%-by-mass noble metal carry depth is the depth at which, when the amount of the specific noble metal carried between the surface of the porous wall and the center of the inside of the porous wall is used as a reference, 50% by mass of the specific noble metal is carried.

OHISHI SHUNSUKE (JP)
OTA TAKAYA (JP)
TAKASU RYOSUKE (JP)
OKADA MITSUYOSHI (JP)
ITOU MINORU (JP)
IWATA KANA (JP)
TOJO TAKUMI (JP)
YOSHIDA TAKERU (JP)
KAKINOHANA MASARU (JP)
SUZUKI HIROMASA (JP)

PCT/JP2019/044764

May 28, 2020

November 14, 2019

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CATALER CORP (JP)
TOYOTA MOTOR CO LTD (JP)

B01J35/04; B01D53/94; B01J23/63; B01J37/08; F01N3/10; F01N3/28

JP2019058870A	2019-04-18
JP2015085241A	2015-05-07
JP2008302304A	2008-12-18
JP2009255032A	2009-11-05
JP2016513014A	2016-05-12
JP2017200675A	2017-11-09
JP2006026561A	2006-02-02

AOKI, Atsushi et al. (JP)

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