Title:
CATALYST FOR EXHAUST GAS PURIFICATION
Document Type and Number:
WIPO Patent Application WO/2024/075420
Kind Code:
A1
Abstract:
Provided is a catalyst for exhaust gas purification which has improved NOx-occluding performance in a lean atmosphere. A catalyst 100 for exhaust gas purification disclosed herein comprises a base 10 and a catalyst layer 20. The catalyst layer 20 comprises a lower layer 22, an interlayer 24, and an upper layer 26. The upper layer 26 includes Rh. The interlayer 24 at least includes Pt and an NOx-occluding material. The lower layer 22 has a lower-layer front portion 22a including Pd and a lower-layer rear portion 22b including Pd, wherein the content (CF) of Pd in the lower-layer front portion 22a per liter of the base is higher than the content (CR) of Pd in the lower-layer rear portion 22b per liter of the base.
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Inventors:
TAKASU RYOSUKE (JP)
ONOE RYOTA (JP)
OHASHI TATSUYA (JP)
ITO MASAYA (JP)
ONOHARA YU (JP)
ONOE RYOTA (JP)
OHASHI TATSUYA (JP)
ITO MASAYA (JP)
ONOHARA YU (JP)
Application Number:
PCT/JP2023/030440
Publication Date:
April 11, 2024
Filing Date:
August 24, 2023
Export Citation:
Assignee:
CATALER CORP (JP)
International Classes:
B01J27/232; B01D53/94; B01J27/053; F01N3/10
Foreign References:
| JP2018143935A | 2018-09-20 | |||
| JP2018199094A | 2018-12-20 | |||
| JP2022075041A | 2022-05-18 | |||
| JP2017501032A | 2017-01-12 |
Attorney, Agent or Firm:
ABE, Makoto (JP)
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