FR2134762A5 - Decomposing oxides of nitrogen - Google Patents

Decomposing oxides of nitrogen

Info

Publication number
FR2134762A5
FR2134762A5 FR7113858A FR7113858A FR2134762A5 FR 2134762 A5 FR2134762 A5 FR 2134762A5 FR 7113858 A FR7113858 A FR 7113858A FR 7113858 A FR7113858 A FR 7113858A FR 2134762 A5 FR2134762 A5 FR 2134762A5
Authority
FR
France
Prior art keywords
catalyst
gas
oxides
hydrocarbons
contg
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
FR7113858A
Other languages
French (fr)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Pro Catalyse SA
Original Assignee
Pro Catalyse SA
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Pro Catalyse SA filed Critical Pro Catalyse SA
Priority to FR7113858A priority Critical patent/FR2134762A5/en
Priority to FR7143394A priority patent/FR2163830A6/fr
Priority to BE781951A priority patent/BE781951A/en
Priority to CA139,972A priority patent/CA992057A/en
Priority to GB1791972A priority patent/GB1373280A/en
Priority to DE2218665A priority patent/DE2218665C3/en
Priority to IT23329/72A priority patent/IT953675B/en
Priority to JP3948972A priority patent/JPS5627293B1/ja
Priority to NL7205239A priority patent/NL7205239A/xx
Application granted granted Critical
Publication of FR2134762A5 publication Critical patent/FR2134762A5/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation 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
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9445—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC]
    • B01D53/945—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC] characterised by a specific catalyst
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
    • B01J21/005—Spinels
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
    • B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/84—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/85—Chromium, molybdenum or tungsten
    • B01J23/86—Chromium
    • B01J23/866—Nickel and chromium
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Abstract

A catalyst for the decompsn. of oxides of N consists of a carrier contg. 3-20 wt. % active component of formula:- Nix(FeyCrz)Ot, (where x = 0.5-1.5, y + z = 1.5-3 y : (y + z) = 0.01-0.9 : 1 and t is <10). The catalyst is used to decompose oxides of N in gas mixts. also contg. is not <1 reducing gas, e.g. H2 or CO; the gas mixt. is esp. an exhaust gas from an Ic engine. The catalysts also catalyse the reaction of CO and hydrocarbons with steam, and the oxidn. of hydrocarbons and CO. The catalyst is active at relatively low temp., e.g. 200-350 degrees C. It has high initial activity, which decreases only slightly with time, and high selectivity for molecular N. The catalyst has good mechanical strength
FR7113858A 1971-04-19 1971-04-19 Decomposing oxides of nitrogen Expired FR2134762A5 (en)

Priority Applications (9)

Application Number Priority Date Filing Date Title
FR7113858A FR2134762A5 (en) 1971-04-19 1971-04-19 Decomposing oxides of nitrogen
FR7143394A FR2163830A6 (en) 1971-04-19 1971-12-02
BE781951A BE781951A (en) 1971-04-19 1972-04-12 PROCESS FOR THE DECOMPOSITION OF NITROGEN OXIDES AND NITROGEN CATALYSTS
GB1791972A GB1373280A (en) 1971-04-19 1972-04-18 Process and catalyst for decomposing nitrogen oxides
CA139,972A CA992057A (en) 1971-04-19 1972-04-18 Nitrous oxide breakdown process and catalyst utilised
DE2218665A DE2218665C3 (en) 1971-04-19 1972-04-18 Catalyst containing iron, chromium and nickel for the decomposition of nitrogen oxides
IT23329/72A IT953675B (en) 1971-04-19 1972-04-19 PROCEDURE FOR THE DECOMPOSITION OF THE NITROGEN OXIDES AND CATA LYZERS USED
JP3948972A JPS5627293B1 (en) 1971-04-19 1972-04-19
NL7205239A NL7205239A (en) 1971-04-19 1972-04-19

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7113858A FR2134762A5 (en) 1971-04-19 1971-04-19 Decomposing oxides of nitrogen

Publications (1)

Publication Number Publication Date
FR2134762A5 true FR2134762A5 (en) 1972-12-08

Family

ID=9075551

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7113858A Expired FR2134762A5 (en) 1971-04-19 1971-04-19 Decomposing oxides of nitrogen

Country Status (1)

Country Link
FR (1) FR2134762A5 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2209714A1 (en) * 1972-12-09 1974-07-05 Hitachi Shipbuilding Eng Co

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2209714A1 (en) * 1972-12-09 1974-07-05 Hitachi Shipbuilding Eng Co

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Legal Events

Date Code Title Description
ST Notification of lapse