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Title:
EXHAUST GAS PURIFICATION CATALYST DEVICE
Document Type and Number:
WIPO Patent Application WO/2019/163446
Kind Code:
A1
Abstract:
This exhaust gas purification catalyst device 100 comprises an upper layer 10 which includes first carrier particles and rhodium, and a lower layer 20 which includes second carrier particles, and the upper layer 10 comprises a rhodium enriched area 11 in the range a, from the downstream end in the exhaust gas flow to greater than 50% and up to 80% of the upper layer length, and a range b from the upper layer top surface less than 20 μm in the depth direction. The rhodium enriched area 11 contains at least 50% and less than 100% of all the rhodium in the upper layer 10.

Inventors:
OHISHI SHUNSUKE (JP)
OTA TAKAYA (JP)
SAITO YOSHINORI (JP)
NAKAHIGASHI SEIJI (JP)
CHINZEI ISAO (JP)
SUZUKI HIROMASA (JP)
Application Number:
PCT/JP2019/003022
Publication Date:
August 29, 2019
Filing Date:
January 29, 2019
Export Citation:
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Assignee:
CATALER CORP (JP)
TOYOTA MOTOR CO LTD (JP)
International Classes:
B01J35/04; B01D53/94; B01J37/02; F01N3/10; F01N3/28
Domestic Patent References:
WO2008038834A12008-04-03
WO2006057067A12006-06-01
Foreign References:
JPH02142623U1990-12-04
JP2011255378A2011-12-22
JP2008302304A2008-12-18
JP2017104825A2017-06-15
JP2008012410A2008-01-24
JPH076017A1995-01-10
JP2011255378A2011-12-22
JP2008302304A2008-12-18
JP2015085241A2015-05-07
Other References:
See also references of EP 3756760A4
Attorney, Agent or Firm:
AOKI, Atsushi et al. (JP)
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