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GB1445239A - Method of decomposing ammonia - Google Patents

Method of decomposing ammonia

Info

Publication number
GB1445239A
GB1445239A GB3847474A GB3847474A GB1445239A GB 1445239 A GB1445239 A GB 1445239A GB 3847474 A GB3847474 A GB 3847474A GB 3847474 A GB3847474 A GB 3847474A GB 1445239 A GB1445239 A GB 1445239A
Authority
GB
United Kingdom
Prior art keywords
ammonia
catalyst
gas
ruthenium
gas 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
GB3847474A
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.)
Mitsubishi Kasei Corp
Original Assignee
Mitsubishi Kasei Corp
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 JP10293373A external-priority patent/JPS538320B2/ja
Priority claimed from JP48102934A external-priority patent/JPS5220031B2/ja
Application filed by Mitsubishi Kasei Corp filed Critical Mitsubishi Kasei Corp
Publication of GB1445239A publication Critical patent/GB1445239A/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
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8621—Removing nitrogen compounds
    • B01D53/8634—Ammonia
    • 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
    • B01J23/42—Platinum
    • 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
    • B01J23/462—Ruthenium
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B21/00—Nitrogen; Compounds thereof
    • C01B21/02—Preparation of nitrogen
    • C—CHEMISTRY; METALLURGY
    • C01—INORGANIC CHEMISTRY
    • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
    • C01B21/00—Nitrogen; Compounds thereof
    • C01B21/20—Nitrogen oxides; Oxyacids of nitrogen; Salts thereof
    • C01B21/24—Nitric oxide (NO)
    • C01B21/26—Preparation by catalytic or non-catalytic oxidation of ammonia

Landscapes

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

Abstract

1445239 Catalytic decomposition of ammonia MITSUBISHI CHEMICAL INDUSTRIES Ltd 3 Sept 1974 [12 Sept 1973 (2)] 38474/74 Heading C1A Ammonia is catalytically decomposed to nitrogen by contacting a gas mixture containing ammonia and oxygen with a molar ratio of oxygen : ammonia of 3 : 1 or more with a ruthenium and/or a platinum catalyst at 150- 400‹ C. The gas mixture may be contacted first with a ruthenium catalyst and then with a platinum catalyst. The amount of ammonia in the gas mixture may be 2% or less by volume of the total gas. The catalyst may be used with a gas flow at a space velocity of 1000- 100,000 hr.<SP>-1</SP>. The molar ratio NH 3 : NO x in the gas after passing through the first catalyst layer may be 1-10 : 1. The ruthenium and/or platinum may be supported on a carrier at 0À01-2À0% by weight.
GB3847474A 1973-09-12 1974-09-03 Method of decomposing ammonia Expired GB1445239A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP10293373A JPS538320B2 (en) 1973-09-12 1973-09-12
JP48102934A JPS5220031B2 (en) 1973-09-12 1973-09-12

Publications (1)

Publication Number Publication Date
GB1445239A true GB1445239A (en) 1976-08-04

Family

ID=26443618

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3847474A Expired GB1445239A (en) 1973-09-12 1974-09-03 Method of decomposing ammonia

Country Status (4)

Country Link
DE (1) DE2443713A1 (en)
FR (1) FR2243014B3 (en)
GB (1) GB1445239A (en)
NL (1) NL7411915A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2343178A (en) * 1998-10-30 2000-05-03 Univ Reading Catalytic conversion of ammonia to nitrogen
EP2100658A1 (en) * 1998-09-25 2009-09-16 Mitsubishi Heavy Industries, Ltd. Method of denitrating exhaust gas
US7597865B2 (en) 2004-02-27 2009-10-06 Tokyo Roki Co., Ltd Nitrogen oxide removal catalyst system and nitrogen oxide removal method

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2617089C2 (en) * 1976-04-17 1984-03-29 Caloric Gesellschaft für Apparatebau mbH, 8032 Gräfelfing Process for the catalytic cracking of ammonia
US4438082A (en) * 1982-09-30 1984-03-20 Engelhard Corporation Platinum gold catalyst for removing NOx and NH3 from gas streams
JPH01119341A (en) * 1987-10-30 1989-05-11 Nkk Corp Catalyst for ammonia decomposition

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2100658A1 (en) * 1998-09-25 2009-09-16 Mitsubishi Heavy Industries, Ltd. Method of denitrating exhaust gas
GB2343178A (en) * 1998-10-30 2000-05-03 Univ Reading Catalytic conversion of ammonia to nitrogen
GB2343178B (en) * 1998-10-30 2002-07-24 Univ Reading Catalytic conversion of ammonia
US7597865B2 (en) 2004-02-27 2009-10-06 Tokyo Roki Co., Ltd Nitrogen oxide removal catalyst system and nitrogen oxide removal method
CN100553748C (en) * 2004-02-27 2009-10-28 东京滤器株式会社 nitrogen oxide removal catalyst system and nitrogen oxide removal method
EP2305367A1 (en) * 2004-02-27 2011-04-06 Tokyo Roki Co. Ltd. Catalyst system for removing nitrogen oxide and method for removing nitrogen oxide

Also Published As

Publication number Publication date
FR2243014B3 (en) 1977-06-17
DE2443713A1 (en) 1975-03-13
NL7411915A (en) 1975-03-14
FR2243014A1 (en) 1975-04-04

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Legal Events

Date Code Title Description
CSNS Application of which complete specification have been accepted and published, but patent is not sealed