Title:
EXHAUST GAS PURIFICATION CATALYST AND PRODUCTION METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2021/029098
Kind Code:
A1
Abstract:
A substrate (11) of an exhaust gas purification catalyst (10) has an inlet-side cell (21), an outlet-side cell (22), and a porous partition wall (23) that partitions the inlet-side cell and the outlet-side cell. In the partition wall, catalyst parts (14, 15) are provided to a surface facing the inlet-side cell and/or a surface facing the outlet-side cell. In a cross-section perpendicular to the exhaust gas flow direction, the ratio of the total area of voids that satisfy the expression, L/[2(πS)1/2] ≤ 1.1 (where L is the peripheral length of the voids in the cross-section, and S is the area of the voids in the cross-section), to the apparent area of the catalyst parts present on the partition wall is 3% to 10%, inclusive.
Inventors:
NAGAI YUSUKE (JP)
AKITA SHINGO (JP)
KURIHARA HIROKI (JP)
ENDO YOSHINORI (JP)
AKITA SHINGO (JP)
KURIHARA HIROKI (JP)
ENDO YOSHINORI (JP)
Application Number:
PCT/JP2020/010113
Publication Date:
February 18, 2021
Filing Date:
March 09, 2020
Export Citation:
Assignee:
MITSUI MINING & SMELTING CO (JP)
International Classes:
B01J35/04; B01D53/94; B01J23/63; B01J37/02; B01J37/08; F01N3/022; F01N3/035; F01N3/10; F01N3/28
Domestic Patent References:
| WO2015046012A1 | 2015-04-02 | |||
| WO2012023617A1 | 2012-02-23 |
Foreign References:
| US20110005211A1 | 2011-01-13 | |||
| JP2009000663A | 2009-01-08 | |||
| JP2010001184A | 2010-01-07 | |||
| JP2017082745A | 2017-05-18 | |||
| US20190299139A1 | 2019-10-03 |
Other References:
See also references of EP 4011492A4
Attorney, Agent or Firm:
SHOWA INTERNATIONAL PATENT FIRM (JP)
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