Title:
CATALYST FOR EXHAUST GAS PURIFICATION
Document Type and Number:
WIPO Patent Application WO/2018/190300
Kind Code:
A1
Abstract:
The present invention provides a catalyst for exhaust gas purification wherein an alkaline earth metal is supported on a porous carrier in a highly dispersed state. A catalyst layer of the catalyst for exhaust purification provided by the present invention has an alkaline earth metal support region provided with a porous carrier, a catalyst metal belonging to the platinum group, and a sulfate of at least one type of alkali earth metal supported on the porous carrier. For the cross-section of this region, a Pearson correlation coefficient RAe/M is 0.5 or greater calculated using α and β in each pixel obtained by carrying out a surface analysis using FE-EPMA with the conditions of a pixel size of 0.34 × 0.34 µm and a measured pixel number of 256 × 256 and measuring the intensity (α: cps) of characteristic x-rays for the alkaline earth metal element (Ae) and the intensity (β: cps) of characteristic x-rays for the main constituent element (M) of an inorganic compound constituting the porous carrier for each pixel.
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Inventors:
OISHI SHUNSUKE (JP)
KAWAMURA SHOGO (JP)
NAGATA TAKAHIRO (JP)
ORI HIROTAKA (JP)
ITOU MINORU (JP)
KAWAMURA SHOGO (JP)
NAGATA TAKAHIRO (JP)
ORI HIROTAKA (JP)
ITOU MINORU (JP)
Application Number:
PCT/JP2018/014939
Publication Date:
October 18, 2018
Filing Date:
April 09, 2018
Export Citation:
Assignee:
CATALER CORP (JP)
International Classes:
B01J27/053; B01D53/94; B01J37/02; F01N3/10; C01F11/46
Domestic Patent References:
| WO2014156746A1 | 2014-10-02 | |||
| WO2010137658A1 | 2010-12-02 | |||
| WO2010147163A1 | 2010-12-23 | |||
| WO2011030831A1 | 2011-03-17 |
Foreign References:
| JP2014505587A | 2014-03-06 | |||
| CN104741135A | 2015-07-01 | |||
| JP2017078366A | 2017-04-27 | |||
| JPH05237390A | 1993-09-17 | |||
| JPH01285639A | 1989-11-16 |
Other References:
See also references of EP 3581269A4
Attorney, Agent or Firm:
ABE, Makoto (JP)
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