Title:
EXHAUST GAS PURIFICATION CATALYST
Document Type and Number:
WIPO Patent Application WO/2020/071059
Kind Code:
A1
Abstract:
The present invention provides an exhaust gas purification catalyst in which an alkaline earth metal is supported on a porous support in a highly dispersed state. The exhaust gas purification catalyst provided by the present invention is characterized in that: a catalyst layer therein has an alkaline earth metal support region comprising a porous support, Pt, and at least one alkaline earth metal sulfate supported by the porous support; a cross-section of the aforementioned region is subjected to surface analysis using FE-EPMA under conditions such that the pixel size is 0.34 μm × 0.34 μm and the number of measurement pixels is 256 × 256; the intensity (α: cps) of characteristic X-rays of an alkaline earth metal element (Ae) and the intensity (β: cps) of characteristic X-rays of Pt are measured with respect to each pixel; and the Pearson correlation coefficient RAe/Pt value calculated using the resulting α and β of each pixel is 0.5 or higher.
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Inventors:
KAWAMURA SHOGO (JP)
AIKAWA TOMOMASA (JP)
NAITO ISAO (JP)
NIHASHI HIROKI (JP)
TAKAGI NOBUYUKI (JP)
NOBUKAWA TAKESHI (JP)
AIKAWA TOMOMASA (JP)
NAITO ISAO (JP)
NIHASHI HIROKI (JP)
TAKAGI NOBUYUKI (JP)
NOBUKAWA TAKESHI (JP)
Application Number:
PCT/JP2019/035399
Publication Date:
April 09, 2020
Filing Date:
September 09, 2019
Export Citation:
Assignee:
CATALER CORP (JP)
TOYOTA MOTOR CO LTD (JP)
TOYOTA MOTOR CO LTD (JP)
International Classes:
B01J27/053; B01D53/94; B01J37/02; B01J37/08; F01N3/10
Domestic Patent References:
| WO2010147163A1 | 2010-12-23 | |||
| WO2010137658A1 | 2010-12-02 | |||
| WO2011030831A1 | 2011-03-17 | |||
| WO2018190300A1 | 2018-10-18 |
Foreign References:
| JP2018189365A | 2018-11-29 | |||
| JPH05237390A | 1993-09-17 | |||
| JPH01285639A | 1989-11-16 |
Other References:
See also references of EP 3854478A4
Attorney, Agent or Firm:
ABE, Makoto (JP)
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