GB1384248A - Catalytic process - Google Patents

Catalytic process

Info

Publication number
GB1384248A
GB1384248A GB1372271A GB1372271A GB1384248A GB 1384248 A GB1384248 A GB 1384248A GB 1372271 A GB1372271 A GB 1372271A GB 1372271 A GB1372271 A GB 1372271A GB 1384248 A GB1384248 A GB 1384248A
Authority
GB
United Kingdom
Prior art keywords
catalyst
stage
over
oxygen
oxidation
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
GB1372271A
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries 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
Application filed by Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB1372271A priority Critical patent/GB1384248A/en
Priority to ZA723019A priority patent/ZA723019B/en
Priority to FR7216239A priority patent/FR2137589B1/fr
Priority to CH667172A priority patent/CH538598A/en
Priority to IT2403672A priority patent/IT968396B/en
Priority to DE19722222467 priority patent/DE2222467A1/en
Publication of GB1384248A publication Critical patent/GB1384248A/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
    • B01D53/9459—Removing one or more of nitrogen oxides, carbon monoxide, or hydrocarbons by multiple successive catalytic functions; systems with more than one different function, e.g. zone coated catalysts
    • 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
    • B01D53/9404—Removing only nitrogen compounds
    • B01D53/9409—Nitrogen oxides
    • B01D53/9413—Processes characterised by a specific catalyst
    • 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
    • B01D53/944—Simultaneously removing carbon monoxide, hydrocarbons or carbon making use of oxidation catalysts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/10—Noble metals or compounds thereof
    • B01D2255/102—Platinum group metals
    • B01D2255/1021—Platinum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/10—Noble metals or compounds thereof
    • B01D2255/102—Platinum group metals
    • B01D2255/1023—Palladium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/10—Noble metals or compounds thereof
    • B01D2255/102—Platinum group metals
    • B01D2255/1025—Rhodium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20746—Cobalt
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20753—Nickel

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

1384248 Treating exhaust gas IMPERIAL CHEMICAL INDUSTRIES Ltd 25 April 1972 [7 May 1971] 13722/71 Heading F1B A process of treating I.C. engine exhaust gas to remove nitrogen oxides, the gases containing oxygen as a result of incomplete combustion in the engine and also oxidizable constituents in excess of what will react with the oxygen, which comprises passing the gases in a first stage over a catalyst having primarily an oxidation activity until a substantial proportion of the oxygen has been reacted and then in a second stage over a catalyst having primarily a reduction activity until nitrogen oxides are substantially decomposed. The first catalyst is a platinium gauge or palladium or platinium on a support. The second catalyst is a base metal, i.e. nickel or cobalt and may also contain copper. Alternatively the second catalyst may be ruthenium. The volume of the first catalyst is 0.02 to 0.2 times the volume of the second catalyst when both are in the same physical form. The space velocity over the first catalyst is 0.15 to 3.0 x 10<SP>6</SP> hour <SP>-1</SP> and the velocity over the second catalyst is 0.15 to 3.0 x 10<SP>5</SP> hour <SP>-1</SP>. A third treatment stage involving the addition of air and catalytic oxidation may be provided. The reaction temperature in the second stage is over 700‹C e.g. 800-950‹C when a base metal catalyst is used and is 300-700‹C e.g. 300- 500‹C when a precious metal catalyst is used. The first stage catalyst is operated at 400-1000‹C depending on the temperature required at the inlet to the second stage. The oxygen content of the gas entering the first stage is typically 0.5% and this is preferably reduced to less than 0.15%: Catalysts The oxidation catalyst can also be a metallic oxide or oxide mixture selected from the transition metals such as copper, titanium, tin, lead, phosphorus, bismuth, vanadium, niobium, tantalum, chromium, tungsten, manganese and rhenium. Preferably it contains a metal or alloy from Group VIII of the Periodic Table e.g. rhodium, palladium or platinum. The support may be highly calcined magnesia, alumina, mullite. spinel, zirconia, zirconium silicate, hafnia or thoria and may be combined with a low-silica hydraulic cement. The catalytic material is suitably supported on calcined clay/cement granules.
GB1372271A 1971-05-07 1971-05-07 Catalytic process Expired GB1384248A (en)

Priority Applications (6)

Application Number Priority Date Filing Date Title
GB1372271A GB1384248A (en) 1971-05-07 1971-05-07 Catalytic process
ZA723019A ZA723019B (en) 1971-05-07 1972-05-03 Catalytic process
FR7216239A FR2137589B1 (en) 1971-05-07 1972-05-05
CH667172A CH538598A (en) 1971-05-07 1972-05-05 Method and reactor for removing nitrogen oxides from oxygen-containing exhaust gases from internal combustion engines
IT2403672A IT968396B (en) 1971-05-07 1972-05-06 CATALYTIC PROCESS FOR THE TREATMENT OF EXHAUST GASES OF INTERNAL COMBUSTION ENGINES
DE19722222467 DE2222467A1 (en) 1971-05-07 1972-05-08 METHOD OF CATALYTIC TREATMENT OF EXHAUST GAS FROM COMBUSTION ENGINES

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB1372271A GB1384248A (en) 1971-05-07 1971-05-07 Catalytic process

Publications (1)

Publication Number Publication Date
GB1384248A true GB1384248A (en) 1975-02-19

Family

ID=10028187

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1372271A Expired GB1384248A (en) 1971-05-07 1971-05-07 Catalytic process

Country Status (5)

Country Link
CH (1) CH538598A (en)
DE (1) DE2222467A1 (en)
FR (1) FR2137589B1 (en)
GB (1) GB1384248A (en)
ZA (1) ZA723019B (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5531972A (en) * 1989-11-08 1996-07-02 Engelhard Corporation Staged three-way conversion catalyst and method of using the same
EP0707883A3 (en) * 1994-10-06 1996-09-25 N E Chemcat Corp Catalyst and method for purifying exhaust gases
US5618505A (en) * 1993-01-07 1997-04-08 Ford Motor Company Method for converting lean-burn engine exhust gases using a two stage catalyst system
WO2000000272A1 (en) * 1998-06-30 2000-01-06 Asec Manufacturing Reduction of nitrogen oxides in the exhaust gases from internal combustion engines
WO2006087920A1 (en) * 2005-02-18 2006-08-24 Toyota Jidosha Kabushiki Kaisha Exhaust gas purifying catalyst

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2460709A1 (en) * 1979-07-09 1981-01-30 Renault Protective device for catalytic purifier in vehicle exhaust system - comprises small auxiliary catalytic reactor installed upstream of purifier
DE3502866A1 (en) * 1984-09-19 1986-03-20 Klaus Prof. Dr.rer.nat. 4430 Steinfurt Mangold Two-stage process and apparatus for purifying combustion gases
US4912776A (en) * 1987-03-23 1990-03-27 W. R. Grace & Co.-Conn. Process for removal of NOx from fluid streams
CN108671742A (en) * 2017-11-21 2018-10-19 南京钟腾化工有限公司 Normal butane method produces the exhaust treatment system and method for cis-butenedioic anhydride

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5531972A (en) * 1989-11-08 1996-07-02 Engelhard Corporation Staged three-way conversion catalyst and method of using the same
US6087295A (en) * 1992-12-14 2000-07-11 Asec Manufacturing Reduction of NOx in the exhaust gases from internal combustion engines containing excess oxygen
US6365118B1 (en) 1992-12-14 2002-04-02 Delphi Technologies, Inc. Reduction of NOx in the exhaust from leanOx internal combustion engines
US5618505A (en) * 1993-01-07 1997-04-08 Ford Motor Company Method for converting lean-burn engine exhust gases using a two stage catalyst system
EP0707883A3 (en) * 1994-10-06 1996-09-25 N E Chemcat Corp Catalyst and method for purifying exhaust gases
WO2000000272A1 (en) * 1998-06-30 2000-01-06 Asec Manufacturing Reduction of nitrogen oxides in the exhaust gases from internal combustion engines
WO2006087920A1 (en) * 2005-02-18 2006-08-24 Toyota Jidosha Kabushiki Kaisha Exhaust gas purifying catalyst
US7598205B2 (en) 2005-02-18 2009-10-06 Toyota Jidosha Kabushiki Kaisha Exhaust gas purifying catalyst

Also Published As

Publication number Publication date
ZA723019B (en) 1974-01-30
FR2137589A1 (en) 1972-12-29
CH538598A (en) 1973-06-30
DE2222467A1 (en) 1973-01-11
FR2137589B1 (en) 1975-08-01

Similar Documents

Publication Publication Date Title
EP0370523B1 (en) Carrier for gas-treating catalyst, method for production thereof, and gas-treating catalyst incorporating said carrier therein
US4912077A (en) Catalytically active materials and method for their preparation
US4957896A (en) Catalyst for purification of exhaust gases
EP0091814B1 (en) Catalyst composition and method for its manufacture
JPH09500570A (en) Layered catalyst composite
KR900701375A (en) Automobile exhaust gas treatment method and catalyst compound for treatment
GB1492929A (en) Catalytic structures having metallic substrates
US4753915A (en) Process for making a carrier-supported catalyst
US6086835A (en) Oxidation catalyst comprising gold and method of oxidation
GB1384248A (en) Catalytic process
GB1460222A (en) Catalysts for purifying exhaust gases
KR940003609A (en) Catalysts for treating exhaust gases from internal combustion and stationary supply lines
JPS60222145A (en) Method for using heat resistant catalyst
US3220794A (en) Method of oxidizing gaseous products of combustion of hydrocarbon
GB1459632A (en) Converter for the purification of exhaust gases
JPH0741313A (en) Method for selectively oxidizing carbon monoxide and catalyst used for the same method
JPH0538442A (en) Catalyst composition
JPH04180835A (en) Production of catalyst for purifying exhaust gas
JPS5997505A (en) Method for reducing nitrogen dioxide
GB1417546A (en) Catalytic reduction of oxides of nitrogen
JPH0753976A (en) Oxidation of methane
JPH02191548A (en) Catalyst for purification of exhaust gas
JPH074527B2 (en) Combustible gas oxidation catalyst
JPH03293020A (en) Device for purifying exhaust gas from alcohol-powered automobile
JPH0538435A (en) Catalyst composition

Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees