Title:
EXHAUST GAS PURIFICATION DEVICE AND METHOD FOR PRODUCING EXHAUST GAS PURIFICATION DEVICE
Document Type and Number:
Japanese Patent JP2023172107
Kind Code:
A
Abstract:
To provide an exhaust gas purification device which has high OSC performance and can remove NOx at high efficiency even after exposure to a high temperature environment.SOLUTION: There is provided an exhaust gas purification device which comprises a base material having an upstream end and a downstream end, a first catalyst layer containing a first rhodium-containing catalyst and a first cerium-containing oxide formed in the first region between the downstream end and the first position and a second catalyst layer containing a second rhodium-containing catalyst formed in the second region between the upstream end and the second position. The average particle size distribution of the first rhodium particles contained in the first rhodium-containing catalyst is 1.5 to 18 nm. The cerium content of the first catalyst layer, based on the volume of the base material in the first region, is larger than the cerium content of the second catalyst layer, based on the volume of the base material in the second region.SELECTED DRAWING: Figure 1
Inventors:
NISHIO TAKAHIRO
SHIRAKAWA SHOGO
SHIRAKAWA YUKI
TAKAGI NOBUYUKI
AIKAWA TOMOMASA
FUTAHASHI HIROKI
NOGUCHI TAKAHIRO
SHIRAKAWA SHOGO
SHIRAKAWA YUKI
TAKAGI NOBUYUKI
AIKAWA TOMOMASA
FUTAHASHI HIROKI
NOGUCHI TAKAHIRO
Application Number:
JP2022083686A
Publication Date:
December 06, 2023
Filing Date:
May 23, 2022
Export Citation:
Assignee:
TOYOTA MOTOR CORP
CATALER CORP
CATALER CORP
International Classes:
B01J27/053; B01D53/94; B01J37/02; F01N3/10; F01N3/28
Attorney, Agent or Firm:
Patent Attorney Corporation Hiraki International Patent Office
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