Title:
排ガス浄化用触媒及びその製造方法並びにそれを用いた排ガス浄化装置
Document Type and Number:
Japanese Patent JP6851225
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a novel exhaust gas purification catalyst that can maintain catalytic activity of noble metal in a highly active state, to provide a method for producing the catalyst and to provide an exhaust gas purification apparatus using the catalyst.SOLUTION: An exhaust gas purification catalyst 10 comprises a first carrier particle 1, a second carrier particle 2 and a noble metal catalyst particle 3 carried each on the first and second carrier particles. In the exhaust gas purification catalyst 10, the first carrier particle 1 contains at least one kind of metal oxide selected from the group consisting of silica, alumina, ceria, zirconia and titania and a rare earth oxide other than ceria; the second carrier particle 2 contains a rare earth oxide other than ceria; the content of metal oxide in the first carrier particle 1 is higher than the content of metal oxide in the second carrier particle 2; the content of rare earth oxide in the second carrier particle 2 is higher than the content of rare earth oxide in the first carrier particle 1; and the correlation function is 85.0% or more as determined by an energy dispersive X-ray analysis using a field emission type scanning electron microscope.SELECTED DRAWING: Figure 1
Inventors:
Yanagi Kawayuki Kouki
Satoshi Matsueda
Satoshi Matsueda
Application Number:
JP2017041884A
Publication Date:
March 31, 2021
Filing Date:
March 06, 2017
Export Citation:
Assignee:
Cataler Co., Ltd.
International Classes:
B01J37/04; B01D53/94; B01J23/63; F01N3/10
Domestic Patent References:
| JP6516862B2 | ||||
| JP2013117190A | ||||
| JP2014509241A | ||||
| JP2011183317A | ||||
| JP4219140A |
Foreign References:
| WO2010119904A1 | ||||
| WO2017163916A1 |
Attorney, Agent or Firm:
Atsushi Aoki
Takashi Ishida
Tetsuji Koga
Satoshi Deno
Nobuo Sekine
Kazuya Shiokawa
Takashi Ishida
Tetsuji Koga
Satoshi Deno
Nobuo Sekine
Kazuya Shiokawa