Title:
EXHAUST GAS PURIFICATION CATALYST, METHOD FOR PURIFYING EXHAUST GAS, AND METHOD FOR PRODUCING EXHAUST GAS PURIFICATION CATALYST
Document Type and Number:
WIPO Patent Application WO/2023/085091
Kind Code:
A1
Abstract:
This exhaust gas purification catalyst (10) contains: a refractory, three-dimensional structure (20); a second catalyst layer (31) containing palladium and rhodium; and a first catalyst layer (32) containing palladium and located between the refractory, three-dimensional structure (20) and the second catalyst layer (31). The first catalyst layer (32) or the second catalyst layer (31) further contains a ZrPr composite oxide that is a composite oxide of zirconium and praseodymium. The proportion of the mass of praseodymium oxide contained in the ZrPr composite oxide to the total mass of zirconium oxide and praseodymium oxide contained in the ZrPr composite oxide may be 11-90%.
Inventors:
TOMIDA YASUTAKA (JP)
KUNO HIROTAKA (JP)
KUNO HIROTAKA (JP)
Application Number:
PCT/JP2022/039916
Publication Date:
May 19, 2023
Filing Date:
October 26, 2022
Export Citation:
Assignee:
UMICORE SHOKUBAI JAPAN CO LTD (JP)
International Classes:
B01J37/02; B01D53/94; B01J27/053; F01N3/10; F01N3/28
Domestic Patent References:
| WO2014119749A1 | 2014-08-07 |
Foreign References:
| JP2012518531A | 2012-08-16 | |||
| JP2006068728A | 2006-03-16 | |||
| JP2012520163A | 2012-09-06 |
Attorney, Agent or Firm:
MURAYAMA Yasuhiko et al. (JP)
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