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GB1383896A - Process of removing noxious components from exhaust gases with the aid of a catalyst - Google Patents

Process of removing noxious components from exhaust gases with the aid of a catalyst

Info

Publication number
GB1383896A
GB1383896A GB2288673A GB2288673A GB1383896A GB 1383896 A GB1383896 A GB 1383896A GB 2288673 A GB2288673 A GB 2288673A GB 2288673 A GB2288673 A GB 2288673A GB 1383896 A GB1383896 A GB 1383896A
Authority
GB
United Kingdom
Prior art keywords
catalyst
rhodium
zirconia
support material
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
GB2288673A
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.)
WR Grace and Co Conn
WR Grace and Co
Original Assignee
WR Grace and Co Conn
WR Grace and Co
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 WR Grace and Co Conn, WR Grace and Co filed Critical WR Grace and Co Conn
Publication of GB1383896A publication Critical patent/GB1383896A/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
    • Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
    • 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)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

1383896 Treating exhaust gases W R GRACE & CO 14 May 1973 [14 June 1972] 22886/73 Heading B1E [Also in Division F1] A process for converting noxious components of I.C. engine exhaust gas to less harmful entities, the process comprising contacting the exhaust gas with a catalyst comprising (i) rhodium, (ii) platinum, palladium or a mixture thereof and (iii) a support material, the weight ratio of component (ii) to component (i) reckoned as elemental metal being from 5:1 to 80:1, components (i) and (ii) being present as the elemental metals or as metal oxides. The catalyst may contain 0.001 to 0.05% rhodium. The support material may be alumina, silica-aluminas (e.g. mullite), silica, silicamagnesia, zirconia, zirconia-alumina or zirconia-magnesia, or it may comprise cordierite coated with mullite. The catalyst is prepared by impregnating the support material with solutions of rhodium and platinum and/or palladium salts (e.g. bromide, sulphate, chloride, nitrate, tetramine nitrate) followed by drying. To convert to the metal, reduction by hydrogen, carbon monoxide or formic acid vapour is used. To convert to the metal oxide, air calcining at 800‹ to 1800‹F is used.
GB2288673A 1972-06-14 1973-05-14 Process of removing noxious components from exhaust gases with the aid of a catalyst Expired GB1383896A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US26274672A 1972-06-14 1972-06-14

Publications (1)

Publication Number Publication Date
GB1383896A true GB1383896A (en) 1974-02-12

Family

ID=22998850

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2288673A Expired GB1383896A (en) 1972-06-14 1973-05-14 Process of removing noxious components from exhaust gases with the aid of a catalyst

Country Status (5)

Country Link
JP (1) JPS4952171A (en)
DE (1) DE2329611A1 (en)
FR (1) FR2188679A5 (en)
GB (1) GB1383896A (en)
IT (1) IT985412B (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE8004737L (en) * 1979-06-27 1980-12-28 Uop Inc PROCEDURE FOR CONVERSION OF CARBON MONOXIDE, CARBON AND NITROGEN OXIDES IN THE EXHAUST GAS FROM A COMBUSTION ENGINE

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE756151A (en) * 1969-09-16 1971-02-15 Johnson Matthey & Cy Ltd CATALYSIS IMPROVEMENTS
GB1431377A (en) * 1972-04-17 1976-04-07 Ici Ltd Catalytic process
JPS4839362A (en) * 1971-09-25 1973-06-09
GB1417544A (en) * 1971-11-22 1975-12-10 Johnson Matthey Co Ltd Catalysts containing platinum and rhodium
US3801697A (en) * 1972-03-02 1974-04-02 Gulf Research Development Co Process for reducing the content of nitrogen oxides in the exhaust gases from internal combustion engines

Also Published As

Publication number Publication date
FR2188679A5 (en) 1974-01-18
IT985412B (en) 1974-11-30
JPS4952171A (en) 1974-05-21
DE2329611A1 (en) 1974-01-03

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee