MXPA99009195A - Catalizador de almacenamiento de oxidos de nitrogeno. - Google Patents

Catalizador de almacenamiento de oxidos de nitrogeno.

Info

Publication number
MXPA99009195A
MXPA99009195A MXPA99009195A MX9909195A MXPA99009195A MX PA99009195 A MXPA99009195 A MX PA99009195A MX PA99009195 A MXPA99009195 A MX PA99009195A MX 9909195 A MX9909195 A MX 9909195A MX PA99009195 A MXPA99009195 A MX PA99009195A
Authority
MX
Mexico
Prior art keywords
storage
catalyst
nitrogen oxide
sulfate
barium sulfate
Prior art date
Application number
MXPA99009195A
Other languages
English (en)
Inventor
Gobel Ulrich
Original Assignee
Degussa
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 Degussa filed Critical Degussa
Publication of MXPA99009195A publication Critical patent/MXPA99009195A/es

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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
    • B01D53/92—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
    • B01D53/9422—Processes characterised by a specific catalyst for removing nitrogen oxides by NOx storage or reduction by cyclic switching between lean and rich exhaust gases (LNT, NSC, NSR)
    • 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
    • B01J23/58—Platinum group metals with alkali- or alkaline earth metals
    • 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
    • B01J23/63—Platinum group metals with rare earths or actinides
    • 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
    • B01J27/00—Catalysts comprising the elements or compounds of halogens, sulfur, selenium, tellurium, phosphorus or nitrogen; Catalysts comprising carbon compounds
    • B01J27/02—Sulfur, selenium or tellurium; Compounds thereof
    • B01J27/053—Sulfates
    • 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
    • B01D2255/202—Alkali metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/204—Alkaline earth metals
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/204—Alkaline earth metals
    • B01D2255/2042—Barium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/209—Other metals
    • B01D2255/2092—Aluminium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/40—Mixed oxides
    • B01D2255/407—Zr-Ce mixed oxides

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

La presente invencion se refiere a un catalizador almacenador para oxidos de nitrogeno, que contiene por lo menos un material catalizador como tambien por lo menos un componente de almacenamiento para oxidos de nitrogeno seleccionado de entre el grupo consistente en los metales alcalinos y alcalino-terreos. El catalizador almacenador para oxidos de nitrogeno se caracteriza porque despues de la manufactura del catalizador el componente de almacenamiento de los oxidos de nitrogeno se halla presente en forma de sulfato de bario, sulfato de bario, en forma de finas particulas, o en forma de mezcla o de mezcla cristalina de ambos sulfatos o como el producto de su descomposicion, total o parcial, siendo el diametro medio de sus particulas, inferior a 1 mum. El sulfato de bario y/o el sulfato de estroncio funcionan en el catalizador almacenador de acuerdo con la invencion, como material de reserva para el oxido de bario, componente activo de almacenamiento. Debido a las condiciones reductoras bajo las condiciones normales de la conduccion del automotor se originan en sus gases de escape, el sulfato de bario y el sulfato de estroncio son descompuestas obteniendose compuestos que estan en condiciones de almacenar los oxidos de nitrogeno. De esta manera se compensa en mayor o menor grado una perdida, que se presenta por el envejecimiento, en los componentes almacenadores activos. Tambien existe la posibilidad de descomponer, en forma total o parcial, el sulfato de bario y/o el sulfato de estroncio ya durante la produccion mediante una calcinacion reductora, de manera de obtener una elevada carga inicial de composiciones de almacenamiento en el catalizador. En este caso sirven dichos sulfatos como agentes auxiliares para introducir en el catalizador almacenador, composiciones de almacenamiento con las maximas concentraciones posibles.
MXPA99009195A 1998-10-13 1999-10-07 Catalizador de almacenamiento de oxidos de nitrogeno. MXPA99009195A (es)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19847008A DE19847008A1 (de) 1998-10-13 1998-10-13 Stickoxid-Speicherkatalysator

Publications (1)

Publication Number Publication Date
MXPA99009195A true MXPA99009195A (es) 2004-09-01

Family

ID=7884218

Family Applications (1)

Application Number Title Priority Date Filing Date
MXPA99009195A MXPA99009195A (es) 1998-10-13 1999-10-07 Catalizador de almacenamiento de oxidos de nitrogeno.

Country Status (15)

Country Link
US (1) US6413904B1 (es)
EP (1) EP0993860B1 (es)
JP (1) JP3907884B2 (es)
KR (1) KR100630592B1 (es)
CN (1) CN1182910C (es)
AR (1) AR020776A1 (es)
AT (1) ATE359856T1 (es)
AU (1) AU5360999A (es)
BR (1) BR9905093A (es)
CA (1) CA2285825C (es)
DE (2) DE19847008A1 (es)
MX (1) MXPA99009195A (es)
PL (1) PL335960A1 (es)
TR (1) TR199902534A2 (es)
ZA (1) ZA996443B (es)

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Also Published As

Publication number Publication date
CA2285825A1 (en) 2000-04-13
PL335960A1 (en) 2000-04-25
TR199902534A3 (tr) 2000-05-22
CA2285825C (en) 2009-01-20
BR9905093A (pt) 2000-08-08
TR199902534A2 (xx) 2000-05-22
US6413904B1 (en) 2002-07-02
DE19847008A1 (de) 2000-04-20
KR20000029001A (ko) 2000-05-25
EP0993860B1 (de) 2007-04-18
DE59914297D1 (de) 2007-05-31
EP0993860A1 (de) 2000-04-19
CN1262144A (zh) 2000-08-09
JP3907884B2 (ja) 2007-04-18
KR100630592B1 (ko) 2006-10-04
ZA996443B (en) 2000-04-12
JP2000117110A (ja) 2000-04-25
ATE359856T1 (de) 2007-05-15
AR020776A1 (es) 2002-05-29
AU5360999A (en) 2000-04-20
CN1182910C (zh) 2005-01-05

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