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1. WO2020110379 - EXHAUST GAS CLEANING CATALYST AND PRODUCTION METHOD THEREFOR

Publication Number WO/2020/110379
Publication Date 04.06.2020
International Application No. PCT/JP2019/032177
International Filing Date 16.08.2019
IPC
B01J 35/04 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
35Catalysts, in general, characterised by their form or physical properties
02Solids
04Foraminous structures, sieves, grids, honeycombs
B01D 53/94 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
53Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases or aerosols
34Chemical or biological purification of waste gases
92of engine exhaust gases
94by catalytic processes
B01J 23/63 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
23Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/113
38of noble metals
54combined with metals, oxides or hydroxides provided for in groups B01J23/02-B01J23/36118
56Platinum group metals
63with rare earths or actinides
B01J 35/10 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
35Catalysts, in general, characterised by their form or physical properties
02Solids
10characterised by their surface properties or porosity
B01J 37/02 2006.01
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
37Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
02Impregnation, coating or precipitation
F01N 3/035 2006.01
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
3Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
02for cooling, or for removing solid constituents of, exhaust
021by means of filters
033in combination with other devices
035with catalytic reactors
CPC
B01D 53/94
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
DSEPARATION
53Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols,
34Chemical or biological purification of waste gases
92of engine exhaust gases
94by catalytic processes
B01J 23/63
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
23Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
38of noble metals
54combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
56Platinum group metals
63with rare earths or actinides
B01J 35/04
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
35Catalysts, in general, characterised by their form or physical properties
02Solids
04Foraminous structures, sieves, grids, honeycombs
B01J 35/10
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
35Catalysts, in general, characterised by their form or physical properties
02Solids
10characterised by their surface properties or porosity
B01J 37/02
BPERFORMING OPERATIONS; TRANSPORTING
01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
37Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
02Impregnation, coating or precipitation
F01N 3/035
FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
01MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
NGAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
3Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
02for cooling, or for removing solid constituents of, exhaust
021by means of filters
033in combination with other devices
035with catalytic reactors ; , e.g. catalysed diesel particulate filters
Applicants
  • エヌ・イーケムキャット株式会社 N.E. CHEMCAT CORPORATION [JP]/[JP]
Inventors
  • 城取 万陽 SHIROTORI, Mahiro
  • 高橋 禎憲 TAKAHASHI, Yoshinori
Agents
  • 稲葉 良幸 INABA, Yoshiyuki
  • 内藤 和彦 NAITO, Kazuhiko
  • 岡野 聡二郎 OKANO, Sojiro
Priority Data
2018-22209728.11.2018JP
Publication Language Japanese (JA)
Filing Language Japanese (JA)
Designated States
Title
(EN) EXHAUST GAS CLEANING CATALYST AND PRODUCTION METHOD THEREFOR
(FR) CATALYSEUR DE PURIFICATION DE GAZ D'ÉCHAPPEMENT ET SON PROCÉDÉ DE PRODUCTION
(JA) 排ガス浄化触媒及びその製造方法
Abstract
(EN)
The invention is an exhaust gas cleaning catalyst for cleaning exhaust gas discharged from an internal combustion engine, comprising: a wall-flow type substrate having, delineated by a porous partition wall, an introduction side cell, the end portion on the exhaust gas introduction side of which is open, and adjacent to the introduction side cell, a discharge side cell, the end portion on the exhaust gas discharge side of which is open; and a catalyst layer formed within the partition wall. The catalyst layer comprises a first region formed so as to follow the direction in which the partition wall extends from the end portion of the exhaust gas introduction side, a second region formed so as to follow the direction in which the partition wall extends from the end portion of the exhaust gas discharge side, and a third region wherein the first region and the second region overlap with one another. The ratio (Din/Dmid), of the pore diameter Din calculated from the pore distribution in the first region, over the pore diameter Dmid calculated from the pore distribution in the third region, is 1.2 or higher. The ratio (Dout/Dmid), of the pore diameter Dout calculated from the pore distribution in the second region, over the pore diameter Dmid, is 1.2 or higher.
(FR)
L'invention concerne un catalyseur de nettoyage de gaz d'échappement pour le nettoyage de gaz d'échappement déchargés à partir d'un moteur à combustion interne, comprenant : un substrat de type wall-flow ayant, délimité par une paroi de séparation poreuse, une cellule côté introduction, la partie d'extrémité sur le côté d'introduction de gaz d'échappement est ouverte, et adjacente à la cellule côté introduction, une cellule côté décharge, la partie d'extrémité sur le côté de décharge de gaz d'échappement est ouverte; et une couche de catalyseur formée à l'intérieur de la paroi de séparation. La couche de catalyseur comprend une première région formée de manière à suivre la direction dans laquelle la paroi de séparation s'étend à partir de la partie d'extrémité du côté d'introduction de gaz d'échappement, une seconde région formée de manière à suivre la direction dans laquelle la paroi de séparation s'étend à partir de la partie d'extrémité du côté de décharge de gaz d'échappement, et une troisième région dans laquelle la première région et la seconde région se chevauchent l'une l'autre. Le rapport (Din/Dmid), du diamètre de pore Din est calculé à partir de la distribution de pores dans la première région, sur le diamètre de pore Dmid calculé à partir de la distribution de pores dans la troisième région, est de 1,2 ou plus. Le rapport (Dout/Dmid), du diamètre de pore Dout calculé à partir de la distribution de pores dans la seconde région, sur le diamètre de pore Dmid est de 1,2 ou plus.
(JA)
内燃機関から排出される排ガスを浄化する排ガス浄化触媒であって、排ガス導入側の端部が開口した導入側セルと、該導入側セルに隣接し排ガス排出側の端部が開口した排出側セルとが、多孔質の隔壁により画定されたウォールフロー型基材と、前記隔壁内に形成された触媒層と、を有し、前記触媒層が、前記排ガス導入側の端部から前記隔壁の延伸方向に沿って形成される第1領域と、前記排ガス排出側の端部から前記隔壁の延伸方向に沿って形成される第2領域と、前記第1領域と前記第2領域とが重なる第3領域と、を有し、前記第3領域の細孔分布から算出される細孔径Dmidに対する前記第1領域の細孔分布から算出される細孔径Dinの比(Din/Dmid)が、1.2以上であり、前記細孔径Dmidに対する前記第2領域の細孔分布から算出される細孔径Doutの比(Dout/Dmid)が、1.2以上である。
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