ES2075152T3 - Metodo para la reduccion de oxidos de nitrogeno con amoniaco utilizando catalizadores de zeolita activados. - Google Patents

Metodo para la reduccion de oxidos de nitrogeno con amoniaco utilizando catalizadores de zeolita activados.

Info

Publication number
ES2075152T3
ES2075152T3 ES90303884T ES90303884T ES2075152T3 ES 2075152 T3 ES2075152 T3 ES 2075152T3 ES 90303884 T ES90303884 T ES 90303884T ES 90303884 T ES90303884 T ES 90303884T ES 2075152 T3 ES2075152 T3 ES 2075152T3
Authority
ES
Spain
Prior art keywords
ammonia
nitrogen oxides
oxygen
reduction
zeolite
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 - Lifetime
Application number
ES90303884T
Other languages
English (en)
Inventor
John W Byrne
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.)
BASF Catalysts LLC
Original Assignee
Engelhard 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
Application filed by Engelhard Corp filed Critical Engelhard Corp
Application granted granted Critical
Publication of ES2075152T3 publication Critical patent/ES2075152T3/es
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J29/00Catalysts comprising molecular sieves
    • B01J29/04Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/064Crystalline aluminosilicate zeolites; Isomorphous compounds thereof containing iron group metals, noble metals or copper
    • B01J29/072Iron group metals or copper
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01JCHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J29/00Catalysts comprising molecular sieves
    • B01J29/04Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/40Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation 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
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/92Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9404Removing only nitrogen compounds
    • B01D53/9409Nitrogen oxides
    • B01D53/9413Processes characterised by a specific catalyst
    • B01D53/9418Processes characterised by a specific catalyst for removing nitrogen oxides by selective catalytic reduction [SCR] using a reducing agent in a lean exhaust gas
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2251/00Reactants
    • B01D2251/20Reductants
    • B01D2251/206Ammonium compounds
    • B01D2251/2062Ammonia
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2255/00Catalysts
    • B01D2255/20Metals or compounds thereof
    • B01D2255/207Transition metals
    • B01D2255/20738Iron
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2255/00Catalysts
    • B01D2255/20Metals or compounds thereof
    • B01D2255/207Transition metals
    • B01D2255/20761Copper
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2255/00Catalysts
    • B01D2255/50Zeolites

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (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)
  • Catalysts (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)

Abstract

UN METODO QUE COMPRENDE EL PASO A TRAVES DE UN CATALIZADOR DE ZEOLITA, DE UNA CORRIENTE GASEOSA QUE CONTIENE OXIDOS DE NITROGENO, AMONIACO Y OXIGENO PARA CATALIZAR SELECTIVAMENTE LA REDUCCION DE OXIDOS DE NITROGENO Y, SI SE PRESENTA AMONIACO SOBRANTE O SIN ESTABILIZAR, OXIDIZAR EL EXCESO DE AMONIACO SIN ESTABILIZAR CON OXIGENO PARA HIDROGENO Y AGUA. EL METODO INCLUYE EL USO DE UNA COMPOSICION DE CATALIZADOR DE ZEOLITA QUE COMPRENDE UNA ZEOLITA CON SUSTANCIA ACTIVADORA DE LOS CATALIZADORES DE METAL (ES DECIR, HIERRO O COBRE), ESTANDO CARACTERIZADA LA ZEOLITA PORQUE TIENE UNA RELACION DE SILICE A ALUMINA DE AL MENOS UN 10 Y UNA ESTRUCTURA DE PORO QUE ESTA INTERCONECTADA EN TODAS LAS TRES DIMENSIONES CRISTALOGRAFICAS MEDIANTE POROS QUE TIENEN UN DIAMETRO DE PORO CINETICO MEDIO DE AL MENOS 7 ANGSTROMS. LAS ZEOLITAS CON SUSTANCIAS ACTIVADORAS DE LOS CATALIZADORAS DEL TIPO ANTERIOR HAN DEMOSTRADO ALTA TOLERANCIA PARA EL ENVENENAMIENTO CON SULFURO, BUENA ACTIVIDAD PARA REDUCCION CATALITICA SELECTIVA DE OXIDOS DE NITROGENO CON AMONIACO, BUENA ACTIVIDAD PARA LA OXIDACION DE AMONIACO CON OXIGENO Y LA RETENCION DE TALES ACTIVIDADES BENEFICIOSAS INCLUSO BAJO OPERACIONES CON ALTAS TEMPERATURAS, ES DECIR 400 IONES HIDROTERMICAS.
ES90303884T 1989-04-20 1990-04-10 Metodo para la reduccion de oxidos de nitrogeno con amoniaco utilizando catalizadores de zeolita activados. Expired - Lifetime ES2075152T3 (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/341,405 US4961917A (en) 1989-04-20 1989-04-20 Method for reduction of nitrogen oxides with ammonia using promoted zeolite catalysts

Publications (1)

Publication Number Publication Date
ES2075152T3 true ES2075152T3 (es) 1995-10-01

Family

ID=23337413

Family Applications (1)

Application Number Title Priority Date Filing Date
ES90303884T Expired - Lifetime ES2075152T3 (es) 1989-04-20 1990-04-10 Metodo para la reduccion de oxidos de nitrogeno con amoniaco utilizando catalizadores de zeolita activados.

Country Status (10)

Country Link
US (1) US4961917A (es)
EP (1) EP0393917B1 (es)
JP (1) JP2904862B2 (es)
KR (1) KR900015816A (es)
AT (1) ATE125726T1 (es)
CA (1) CA2012035C (es)
DE (1) DE69021249T2 (es)
DK (1) DK0393917T3 (es)
ES (1) ES2075152T3 (es)
GR (1) GR3017625T3 (es)

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