Title:
CATALYST COMPOSITION FOR EXHAUST GAS PURIFICATION AND CATALYST FOR EXHAUST GAS PURIFICATION
Document Type and Number:
WIPO Patent Application WO/2022/209533
Kind Code:
A1
Abstract:
The purpose of the present invention is to provide a catalyst composition for exhaust gas purification and a catalyst for exhaust gas purification, which have improved exhaust gas purification performance. The present invention provides a catalyst composition for exhaust gas purification, which contains Ce-based oxide particles, Ce-Zr-based composite oxide particles, Al-based oxide particles and a noble metal element, wherein: the Ce content in terms of CeO2 in the Ce-based oxide particles is 90% by mass or more based on the mass of the Ce-based oxide particles; the Ce content in terms of CeO2 in the Ce-Zr-based composite oxide particles is from 5% by mass to 90% by mass based on the mass of the Ce-Zr-based composite oxide particles; the Ce-based oxide particles have an average particle diameter of 0.10 μm to 15 μm; and the amount of the Ce-based oxide particles in the catalyst composition for exhaust gas purification is from 2.0% by mass to 30% by mass based on the mass of the catalyst composition for exhaust gas purification.
Inventors:
TANAKA HIROKI (JP)
MORITA ITARU (JP)
NAGAO YUKI (JP)
ENDO YOSHINORI (JP)
MORITA ITARU (JP)
NAGAO YUKI (JP)
ENDO YOSHINORI (JP)
Application Number:
PCT/JP2022/008673
Publication Date:
October 06, 2022
Filing Date:
March 01, 2022
Export Citation:
Assignee:
MITSUI MINING & SMELTING CO LTD (JP)
International Classes:
B01J23/63; B01D53/94; B01J35/04; F01N3/10; F01N3/28
Domestic Patent References:
| WO2019163435A1 | 2019-08-29 | |||
| WO2010131369A1 | 2010-11-18 |
Foreign References:
| JP2009208045A | 2009-09-17 | |||
| JP2017039069A | 2017-02-23 | |||
| JP2006297372A | 2006-11-02 |
Attorney, Agent or Firm:
NAKAMURA Yukitaka et al. (JP)
Download PDF: