FR2170614A5 - Purificn of exhaust gases - with controlled air supply and metal oxide/noble metal catalysts - Google Patents

Purificn of exhaust gases - with controlled air supply and metal oxide/noble metal catalysts

Info

Publication number
FR2170614A5
FR2170614A5 FR7246734A FR7246734A FR2170614A5 FR 2170614 A5 FR2170614 A5 FR 2170614A5 FR 7246734 A FR7246734 A FR 7246734A FR 7246734 A FR7246734 A FR 7246734A FR 2170614 A5 FR2170614 A5 FR 2170614A5
Authority
FR
France
Prior art keywords
exhaust gases
purificn
metal oxide
air supply
noble metal
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
FR7246734A
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.)
Mitsui Mining and Smelting Co Ltd
Original Assignee
Mitsui Mining and Smelting Co Ltd
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
Priority claimed from JP47002226A external-priority patent/JPS4871388A/ja
Priority claimed from JP47005882A external-priority patent/JPS4875456A/ja
Application filed by Mitsui Mining and Smelting Co Ltd filed Critical Mitsui Mining and Smelting Co Ltd
Application granted granted Critical
Publication of FR2170614A5 publication Critical patent/FR2170614A5/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
    • 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

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Health & Medical Sciences (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Catalysts (AREA)

Abstract

In a process for purifying exhaust gases (esp. from petrol engines) by conversion of CO, hydrocarbons and nitrogen oxides into harmless cpds. using a catalyst, the excess O2 content of the mixt. of exhaust gas and air passing through the catalyst bed is adjusted to a value 1.5-2 time the theoretical O2 content. The catalyst pref. comprises at least one 4th-period transition metal oxide and at least one Gp. VIII noble metal. The use of the above O2 excess increases the nitrogen oxide conversion while only slightly decreasing the conversion of CO and hydrocarbons.
FR7246734A 1971-12-28 1972-12-28 Purificn of exhaust gases - with controlled air supply and metal oxide/noble metal catalysts Expired FR2170614A5 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP47002226A JPS4871388A (en) 1971-12-28 1971-12-28
JP47005882A JPS4875456A (en) 1972-01-14 1972-01-14

Publications (1)

Publication Number Publication Date
FR2170614A5 true FR2170614A5 (en) 1973-09-14

Family

ID=26335567

Family Applications (1)

Application Number Title Priority Date Filing Date
FR7246734A Expired FR2170614A5 (en) 1971-12-28 1972-12-28 Purificn of exhaust gases - with controlled air supply and metal oxide/noble metal catalysts

Country Status (3)

Country Link
DE (1) DE2263387A1 (en)
FR (1) FR2170614A5 (en)
IT (1) IT976205B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4297328A (en) * 1979-09-28 1981-10-27 Union Carbide Corporation Three-way catalytic process for gaseous streams
DE3405100A1 (en) * 1984-02-14 1985-08-14 Drägerwerk AG, 2400 Lübeck PT CATALYST ON A CARRIER AS AN AIR PURIFIER

Also Published As

Publication number Publication date
DE2263387A1 (en) 1973-07-26
IT976205B (en) 1974-08-20

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Legal Events

Date Code Title Description
ST Notification of lapse