GB1417546A - Catalytic reduction of oxides of nitrogen - Google Patents

Catalytic reduction of oxides of nitrogen

Info

Publication number
GB1417546A
GB1417546A GB3156275A GB3156275A GB1417546A GB 1417546 A GB1417546 A GB 1417546A GB 3156275 A GB3156275 A GB 3156275A GB 3156275 A GB3156275 A GB 3156275A GB 1417546 A GB1417546 A GB 1417546A
Authority
GB
United Kingdom
Prior art keywords
rhodium
nov
platinum
alloy
mixture
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
GB3156275A
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.)
Johnson Matthey PLC
Original Assignee
Johnson Matthey PLC
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 Johnson Matthey PLC filed Critical Johnson Matthey PLC
Priority to GB3156275A priority Critical patent/GB1417546A/en
Publication of GB1417546A publication Critical patent/GB1417546A/en
Expired legal-status Critical Current

Links

Classifications

    • 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
    • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
    • B01J23/46—Ruthenium, rhodium, osmium or iridium
    • B01J23/464—Rhodium
    • 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
    • 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
    • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
    • B01J23/56—Platinum group metals
    • 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
    • B01D2255/1025—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
    • B01D2255/20753—Nickel
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/50—Zeolites

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Health & Medical Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Biomedical Technology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Catalysts (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

1417546 Treating exhaust gases JOHNSON MATTHEY & CO Ltd 17 Nov 1972 [22 Nov 1971 (2)] 31561/75 and 31562/75 Divided out of 1417544 Heading C1A Waste gases comprising nitrogen oxides and a reducing fuel are treated at elevated temperature to reduce the nitrogen oxides by contact with a catalyst comprising a catalyst support of an inert material and a deposit thereon of a mixture or alloy of platinum and rhodium, rhodium constituting less than 20 wt. per cent of the mixture or alloy. Examples describe the treatment of a simulated engine exhaust gas with catalysts in which platinum-rhodium alloys are supported on a ceramic honeycomb or on ceramic honeycombs washcoated with alumina.
GB3156275A 1971-11-22 1971-11-22 Catalytic reduction of oxides of nitrogen Expired GB1417546A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB3156275A GB1417546A (en) 1971-11-22 1971-11-22 Catalytic reduction of oxides of nitrogen

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB3156275A GB1417546A (en) 1971-11-22 1971-11-22 Catalytic reduction of oxides of nitrogen
GB3156175 1971-11-22

Publications (1)

Publication Number Publication Date
GB1417546A true GB1417546A (en) 1975-12-10

Family

ID=26260970

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3156275A Expired GB1417546A (en) 1971-11-22 1971-11-22 Catalytic reduction of oxides of nitrogen

Country Status (1)

Country Link
GB (1) GB1417546A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2362659A1 (en) * 1976-08-24 1978-03-24 Johnson Matthey Co Ltd IMPROVEMENT OF THE DECOMPOSITION PROCESS BY CATALYSIS OF NITROGEN OXIDES OF A GAS CURRENT
EP0169939A2 (en) * 1984-07-31 1986-02-05 Süd-Chemie Ag Catalyst for eliminating nitrogen oxides from exhaust gases
EP0263399A1 (en) * 1986-10-08 1988-04-13 Kali-Chemie Aktiengesellschaft Process for the catalytic reduction of nitrogen oxides
EP0457480A1 (en) * 1990-05-12 1991-11-21 Johnson Matthey Public Limited Company Catalytic reduction

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2362659A1 (en) * 1976-08-24 1978-03-24 Johnson Matthey Co Ltd IMPROVEMENT OF THE DECOMPOSITION PROCESS BY CATALYSIS OF NITROGEN OXIDES OF A GAS CURRENT
EP0169939A2 (en) * 1984-07-31 1986-02-05 Süd-Chemie Ag Catalyst for eliminating nitrogen oxides from exhaust gases
EP0169939A3 (en) * 1984-07-31 1987-12-02 Süd-Chemie Ag Catalyst for eliminating nitrogen oxides from exhaust gases
EP0263399A1 (en) * 1986-10-08 1988-04-13 Kali-Chemie Aktiengesellschaft Process for the catalytic reduction of nitrogen oxides
US4935393A (en) * 1986-10-08 1990-06-19 Kali-Chemie Ag Process for catalytic reduction of nitrogen oxides
EP0457480A1 (en) * 1990-05-12 1991-11-21 Johnson Matthey Public Limited Company Catalytic reduction
US5516741A (en) * 1990-05-12 1996-05-14 Johnson Matthey Public Limited Company Reduced chlorine containing platinum catalysts

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Legal Events

Date Code Title Description
PS Patent sealed
PE20 Patent expired after termination of 20 years