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1. IN202047026706 - PHOSPHORUS-COMPOUND-CONTAINING-EXHAUST-GAS PURIFYING CATALYST

Office
India
Application Number 202047026706
Application Date 24.06.2020
Publication Number 202047026706
Publication Date 31.07.2020
Grant Number 360185
Grant Date 03.03.2021
Publication Kind B
IPC
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
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 or 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 B01J21/113
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
F01N 3/10
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
08for rendering innocuous
10by thermal or catalytic conversion of noxious components of exhaust
F01N 3/28
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
08for rendering innocuous
10by thermal or catalytic conversion of noxious components of exhaust
24characterised by constructional aspects of converting apparatus
28Construction of catalytic reactors
Applicants UMICORE SHOKUBAI JAPAN CO., LTD.
Inventors KUNO, Hirotaka
NAKASHIMA, Masashi
NAKAMA, Kimihiro
Priority Data 2017-254113 28.12.2017 JP
Title
(EN) PHOSPHORUS-COMPOUND-CONTAINING-EXHAUST-GAS PURIFYING CATALYST
Abstract
(EN) A phosphorus compound-containing exhaust gas purifying catalyst, comprising: a refractory three-dimensional structure extending from a gas inflow side end surface to a gas outflow side end surface, the refractory three-dimensional structure having cell walls that define and form multiple gas flow paths, the gas flow paths running from the gas inflow side end surface to the gas outflow side end surface; a lower catalyst layer that contains Pd and is formed continuously from the gas inflow side end surface on the cell walls; a gas inflow side upper catalyst layer that contains Rh and is located as an uppermost layer on the cell walls, the gas inflow side upper catalyst layer being formed continuously from the gas inflow side end surface; and a gas outflow side upper catalyst layer that contains Rh and is located as an uppermost layer on the cell walls, the gas outflow side upper catalyst layer being formed continuously from the gas outflow side end surface, wherein the gas inflow side upper catalyst layer and the gas outflow side upper catalyst layer are disposed so as to be separated from one another along the gas flow path direction, and the lower catalyst layer having a length along the gas flow path direction of 15 mm or more, and a length ratio is 18% or more and less than 100% of the total length of the gas flow paths.Fig 1.