GB1393053A - Catalytic reduction of nitrogen oxides - Google Patents

Catalytic reduction of nitrogen oxides

Info

Publication number
GB1393053A
GB1393053A GB3497073A GB3497073A GB1393053A GB 1393053 A GB1393053 A GB 1393053A GB 3497073 A GB3497073 A GB 3497073A GB 3497073 A GB3497073 A GB 3497073A GB 1393053 A GB1393053 A GB 1393053A
Authority
GB
United Kingdom
Prior art keywords
nitrogen oxides
catalytic reduction
ammonia
reducing
type
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
GB3497073A
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.)
US Atomic Energy Commission (AEC)
Original Assignee
US Atomic Energy Commission (AEC)
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 US Atomic Energy Commission (AEC) filed Critical US Atomic Energy Commission (AEC)
Publication of GB1393053A publication Critical patent/GB1393053A/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
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/18—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the mordenite type
    • 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
    • B01D53/46—Removing components of defined structure
    • B01D53/54—Nitrogen compounds
    • 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
    • B01D53/8625—Nitrogen oxides
    • B01D53/8628—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
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/08—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y
    • B01J29/082—X-type faujasite
    • 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

Abstract

1393053 Reducing NO x in waste gases to N 2 and/or N 2 O UNITED STATES ATOMIC ENERGY COMMISSION 23 July 1973 [30 Aug 1972] 34970/73 Heading C1A NO x in waste gas streams are removed by mixing with a reducing gas, preferably ammonia and passing the combined gas stream preferably at 200-550‹ C. over a zeolite catalyst having a pore size of 3-10 Š wherein the NO x (mainly NO 2 ) are reduced by the ammonia to elemental nitrogen and/or innocuous N 2 O. Preferred zeolites are the Na type x faujasite, synthetic mordenite or Ag exchanged type x zeolite.
GB3497073A 1972-08-30 1973-07-23 Catalytic reduction of nitrogen oxides Expired GB1393053A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US28481072A 1972-08-30 1972-08-30

Publications (1)

Publication Number Publication Date
GB1393053A true GB1393053A (en) 1975-05-07

Family

ID=23091610

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3497073A Expired GB1393053A (en) 1972-08-30 1973-07-23 Catalytic reduction of nitrogen oxides

Country Status (4)

Country Link
JP (1) JPS5641300B2 (en)
DE (1) DE2341744C2 (en)
FR (1) FR2197815B1 (en)
GB (1) GB1393053A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4104361A (en) * 1975-03-28 1978-08-01 Exxon Research & Engineering Co. Catalyst for reduction of nitrogen oxides and process for preparing the same
DE3000383A1 (en) * 1979-01-12 1980-07-31 Norton Co METHOD FOR CATALYTIC REDUCTION OF NITROXIDE
GB2162830A (en) * 1984-08-10 1986-02-12 Babcock Hitachi Kk Ammonia reduction-denitration process
EP0214942A1 (en) * 1985-07-29 1987-03-18 Eka Nobel Aktiebolag Catalyst and method for purifying exhaust gases from nitrogen oxides
WO2009135588A1 (en) * 2008-05-07 2009-11-12 Umicore Ag & Co. Kg Method for decreasing nitrogen oxides in hydrocarbon-containing exhaust gases using an scr catalyst based on a molecular sieve
US10001053B2 (en) 2008-06-27 2018-06-19 Umicore Ag & Co. Kg Method and device for the purification of diesel exhaust gases

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS516169A (en) * 1974-07-05 1976-01-19 Hitachi Ltd
JPS539598B2 (en) * 1974-09-10 1978-04-06
JPS5242489A (en) * 1976-05-20 1977-04-02 Toa Nenryo Kogyo Kk Nox-reduction catalyst and method of producing thereof
GB1586530A (en) * 1977-05-31 1981-03-18 Caterpillar Tractor Co Two-stage catalysts of engine exhaust
DE3244370A1 (en) * 1982-12-01 1984-06-07 Basf Ag, 6700 Ludwigshafen METHOD FOR THE REMOVAL OF DISTROXIDE OXIDE FROM HYDROGEN, NITROGEN MONOXIDE AND GASES CONTAINING DISTICKOXIDE
DE3328653A1 (en) * 1983-08-09 1985-02-28 Steuler Industriewerke GmbH, 5410 Höhr-Grenzhausen DEVICE FOR CARRYING OUT A METHOD FOR SEPARATING STICKOXYDES FROM EXHAUST GASES
EP0205813A3 (en) * 1985-04-22 1988-09-21 Klaus Rennebeck Catalyst, especially for cleaning exhaust gas, process and apparatus for its manufacture
DE3704030A1 (en) * 1987-02-10 1988-08-18 Ruhrgas Ag Process for separating off nitrogen oxides from exhaust gases by selective catalytic reduction
FR2622474B2 (en) * 1987-04-03 1990-01-26 Azote & Prod Chim CATALYTIC COMPOSITION FOR THE SELECTIVE REDUCTION OF NITROGEN OXIDES CONTAINED IN OXYGENOUS GAS EFFLUENTS AND METHOD FOR THE PURIFICATION OF SUCH EFFLUENTS
FR2613253B1 (en) * 1987-04-03 1989-06-09 Azote & Prod Chim CATALYTIC COMPOSITION FOR THE SELECTIVE REDUCTION OF NITROGEN OXIDES CONTAINED IN OXYGENOUS GAS EFFLUENTS AND METHOD FOR THE PURIFICATION OF SUCH EFFLUENTS
FR2625919B1 (en) * 1988-01-19 1994-02-11 Institut Francais Petrole PROCESS AND CATALYST FOR SELECTIVE REDUCTION OF NITROGEN OXIDES
JPH01299642A (en) * 1988-05-30 1989-12-04 Hitachi Zosen Corp Adsorbent for nitrogen oxide having low concentration
DE4300988C1 (en) * 1993-01-15 1994-04-07 Ppv Verwaltungs Ag Zuerich Oxygen-enriched air generator contg. zeolite bed giving pure prod. - with chamber in outlet system opened during adsorption and sealed during regeneration phase, e.g. for use in vehicle or aircraft

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3015369A (en) * 1960-05-23 1962-01-02 Socony Mobil Oil Co Inc Removal of nitrogen oxides from combustion gases

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4104361A (en) * 1975-03-28 1978-08-01 Exxon Research & Engineering Co. Catalyst for reduction of nitrogen oxides and process for preparing the same
DE3000383A1 (en) * 1979-01-12 1980-07-31 Norton Co METHOD FOR CATALYTIC REDUCTION OF NITROXIDE
FR2446253A1 (en) * 1979-01-12 1980-08-08 Norton Co PROCESS FOR THE REDUCTION OF NITROGEN OXIDES BY AMMONIA IN THE PRESENCE OF CLINOPTILOTITIS
GB2162830A (en) * 1984-08-10 1986-02-12 Babcock Hitachi Kk Ammonia reduction-denitration process
EP0214942A1 (en) * 1985-07-29 1987-03-18 Eka Nobel Aktiebolag Catalyst and method for purifying exhaust gases from nitrogen oxides
WO2009135588A1 (en) * 2008-05-07 2009-11-12 Umicore Ag & Co. Kg Method for decreasing nitrogen oxides in hydrocarbon-containing exhaust gases using an scr catalyst based on a molecular sieve
EP2898941A1 (en) * 2008-05-07 2015-07-29 Umicore AG & Co. KG System for treating diesel engine exhaust gases containing nitrogen oxides and hydrocarbons
EP2918330A1 (en) * 2008-05-07 2015-09-16 Umicore Ag & Co. Kg Method for reducing nitrogen oxides in hydrocarbon containing waste gas streams using an scr catalytic converter on the basis of a molecular filter
EP2918329A1 (en) * 2008-05-07 2015-09-16 Umicore Ag & Co. Kg Method for reducing nitrogen oxides in hydrocarbon containing waste gas streams using an scr catalytic converter on the basis of a molecular filter
EP3195920A1 (en) * 2008-05-07 2017-07-26 Umicore Ag & Co. Kg Method for decreasing nitrogen oxides in hydrocarbon-containing exhaust gases using an scr catalyst based on a molecular sieve
US10001053B2 (en) 2008-06-27 2018-06-19 Umicore Ag & Co. Kg Method and device for the purification of diesel exhaust gases
US10316739B2 (en) 2008-06-27 2019-06-11 Umicore Ag & Co. Kg Method and device for the purification of diesel exhaust gases

Also Published As

Publication number Publication date
JPS5641300B2 (en) 1981-09-28
DE2341744C2 (en) 1983-07-14
JPS4959075A (en) 1974-06-07
DE2341744A1 (en) 1974-03-07
FR2197815B1 (en) 1978-01-27
FR2197815A1 (en) 1974-03-29

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Legal Events

Date Code Title Description
PS Patent sealed
746 Register noted 'licences of right' (sect. 46/1977)
PE20 Patent expired after termination of 20 years

Effective date: 19930722