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 catalystInfo
- 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
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.
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)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3023943C2 (en) * | 1979-06-27 | 1982-12-02 | UOP Inc., 60016 Des Plaines, Ill. | Process for converting carbon monoxide, hydrocarbons and nitrogen oxides in the hot exhaust gas of an internal combustion engine |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
BE756150A (en) * | 1969-09-16 | 1971-02-15 | Johnson Matthey & Cy Ltd | IMPROVEMENTS TO CATALYTIC REACTIONS |
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 |
-
1973
- 1973-05-14 GB GB2288673A patent/GB1383896A/en not_active Expired
- 1973-06-09 DE DE2329611A patent/DE2329611A1/en not_active Ceased
- 1973-06-11 IT IT50672/73A patent/IT985412B/en active
- 1973-06-12 FR FR7321275A patent/FR2188679A5/fr not_active Expired
- 1973-06-13 JP JP48065966A patent/JPS4952171A/ja active Pending
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 |