IT1005647B - PROCEDURE TO REDUCE HARMFUL NITROGEN OXIDES IN EXHAUST GAS CATALYT - Google Patents

PROCEDURE TO REDUCE HARMFUL NITROGEN OXIDES IN EXHAUST GAS CATALYT

Info

Publication number
IT1005647B
IT1005647B IT1254174A IT1254174A IT1005647B IT 1005647 B IT1005647 B IT 1005647B IT 1254174 A IT1254174 A IT 1254174A IT 1254174 A IT1254174 A IT 1254174A IT 1005647 B IT1005647 B IT 1005647B
Authority
IT
Italy
Prior art keywords
catalyt
procedure
exhaust gas
nitrogen oxides
reduce harmful
Prior art date
Application number
IT1254174A
Other languages
Italian (it)
Original Assignee
Atomic Energy Commission
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 Atomic Energy Commission filed Critical Atomic Energy Commission
Application granted granted Critical
Publication of IT1005647B publication Critical patent/IT1005647B/en

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
    • B01J29/20—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the mordenite type containing iron group metals, noble metals or copper
    • 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
    • B01D53/9418—Processes characterised by a specific catalyst for removing nitrogen oxides by selective catalytic reduction [SCR] using a reducing agent in a lean exhaust gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/20—Reductants
    • B01D2251/202—Hydrogen
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/20—Reductants
    • B01D2251/204—Carbon monoxide
    • 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
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20761—Copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/50—Zeolites
IT1254174A 1973-03-13 1974-03-13 PROCEDURE TO REDUCE HARMFUL NITROGEN OXIDES IN EXHAUST GAS CATALYT IT1005647B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US34080973A 1973-03-13 1973-03-13

Publications (1)

Publication Number Publication Date
IT1005647B true IT1005647B (en) 1976-09-30

Family

ID=23335025

Family Applications (1)

Application Number Title Priority Date Filing Date
IT1254174A IT1005647B (en) 1973-03-13 1974-03-13 PROCEDURE TO REDUCE HARMFUL NITROGEN OXIDES IN EXHAUST GAS CATALYT

Country Status (4)

Country Link
JP (1) JPS49122475A (en)
DE (1) DE2411853A1 (en)
FR (1) FR2221172A1 (en)
IT (1) IT1005647B (en)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS548351B2 (en) * 1973-09-27 1979-04-14
JPS5242489A (en) * 1976-05-20 1977-04-02 Toa Nenryo Kogyo Kk Nox-reduction catalyst and method of producing thereof
US4297328A (en) * 1979-09-28 1981-10-27 Union Carbide Corporation Three-way catalytic process for gaseous streams
DE3544476A1 (en) * 1985-12-16 1987-06-19 Sued Chemie Ag IRONED CATALYST FOR REDUCING THE NITROGEN OXIDE CONTENT OF COMBUSTION EXHAUST GASES
DE3635284A1 (en) * 1986-10-16 1988-04-28 Steuler Industriewerke Gmbh CATALYST FOR REMOVING NITROGEN OXIDS FROM EXHAUST GAS
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
JPH01310742A (en) * 1988-06-07 1989-12-14 Toyota Motor Corp Catalyst for use in purification of exhaust gas
DE3841990A1 (en) * 1988-12-14 1990-06-21 Degussa PROCESS FOR REDUCING STICK OXIDES FROM EXHAUST GASES
DE19728701A1 (en) * 1997-07-04 1999-01-07 Metallgesellschaft Ag Process for the production of fine-grained catalysts from naturally occurring zeolite

Also Published As

Publication number Publication date
FR2221172A1 (en) 1974-10-11
DE2411853A1 (en) 1974-09-19
FR2221172B3 (en) 1976-12-24
JPS49122475A (en) 1974-11-22

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