Title:
EXHAUST GAS PURIFICATION CATALYST FOR AUTOMOBILE
Document Type and Number:
Japanese Patent JP2020168587
Kind Code:
A
Abstract:
To provide an exhaust gas purification catalyst for an automobile which easily desorbs Nox from an NOx absorbing/desorbing layer in a stoichiometric to rich atmosphere and can improve a purification rate of the desorbed NOx, HC or the like.SOLUTION: There is provided an exhaust gas purification catalyst for an automobile which comprises a catalyst layer 2 on an integral construction type carrier 1, wherein the catalyst layer is composed of a lamination of a first purification layer 21, an NOx absorbing/desorbing layer 23 and a second purification layer 22 in this order from the integral construction type carrier side, an adhesion amount (g/L) of the catalyst layer per unit volume satisfies the relation of the following expressions (1) and (2). The first purification layer:the second purification layer=0.428:1 to 1.5:1 Expression (1) and NOx absorbing/desorbing layer:(the first purification layer+the second purification layer)=1.9:1 to 2.45:1 Expression (2).SELECTED DRAWING: Figure 1
Inventors:
MASEI KEITA
FUJIMOTO MISAKI
TSUJI MINORI
YAMASHITA KATSURA
FUJIMOTO MISAKI
TSUJI MINORI
YAMASHITA KATSURA
Application Number:
JP2019069681A
Publication Date:
October 15, 2020
Filing Date:
April 01, 2019
Export Citation:
Assignee:
NISSAN MOTOR
RENAULT SAS
RENAULT SAS
International Classes:
B01J23/58; B01D53/94; F01N3/10
Domestic Patent References:
| JP2001286769A | 2001-10-16 | |||
| JP2004313972A | 2004-11-11 | |||
| JP2010106799A | 2010-05-13 | |||
| JP2011183316A | 2011-09-22 |
Foreign References:
| US20090175773A1 | 2009-07-09 |
Attorney, Agent or Firm:
Janggi Motonori
Hiroshi Suzuki
Hiroshi Suzuki