[go: up one dir, main page]

WO2000032912A1 - Piege a soufre et desulfatation d'un systeme de purification des gaz d'echappement d'un moteur a combustion interne - Google Patents

Piege a soufre et desulfatation d'un systeme de purification des gaz d'echappement d'un moteur a combustion interne Download PDF

Info

Publication number
WO2000032912A1
WO2000032912A1 PCT/EP1999/008672 EP9908672W WO0032912A1 WO 2000032912 A1 WO2000032912 A1 WO 2000032912A1 EP 9908672 W EP9908672 W EP 9908672W WO 0032912 A1 WO0032912 A1 WO 0032912A1
Authority
WO
WIPO (PCT)
Prior art keywords
sulfur trap
segments
segment
nox storage
sulfur
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.)
Ceased
Application number
PCT/EP1999/008672
Other languages
German (de)
English (en)
Inventor
Ekkehard Pott
Rolf Bosse
Jürgen Gloger
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.)
Volkswagen AG
Original Assignee
Volkswagen AG
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 Volkswagen AG filed Critical Volkswagen AG
Publication of WO2000032912A1 publication Critical patent/WO2000032912A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
    • F01N3/085—Sulfur or sulfur oxides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
    • F01N3/0842—Nitrogen oxides
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
    • F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
    • F01N3/0871—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents using means for controlling, e.g. purging, the absorbents or adsorbents
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL-COMBUSTION ENGINES
    • F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
    • F01N2240/16—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being an electric heater, i.e. a resistance heater

Definitions

  • the invention relates to a sulfur trap of an exhaust gas purification system or an exhaust gas purification system with a sulfur trap and a method for operating the sulfur trap or exhaust gas purification system, a NOx storage catalytic converter being used in particular in the exhaust gas purification system.
  • the storage catalytic converters are preceded by sulfur traps, which store the SO2 and largely keep at least 50% and usually 80% away from the NOx storage catalytic converter, thereby reducing the rate of poisoning of the NOx storage catalytic converter.
  • an electrical heating device can be used, which can be set in function by means of a control or regulating device.
  • the invention has for its object to provide a sulfur trap for an exhaust gas cleaning system of a motor vehicle and an exhaust gas cleaning system with such a sulfur trap and a method for operating the sulfur trap or an exhaust gas cleaning system with such a sulfur trap, so that the exhaust gas cleaning can be carried out with less energy.
  • the sulfur trap is divided into n> 1 disjoint segments.
  • the segments are disjoint in the sense that they do not overlap and at most have common interfaces.
  • a separate heating device is preferably assigned to each segment of the sulfur trap. It is also possible to divide the segments into non-overlapping groups, each group having a heating element.
  • each segment or segment group can be controlled individually, as a result of which each segment or segment group can be heated separately to the desulfation temperature.
  • the segments (2a, 2b, 2c, ...; 4a, 4b, 4c, ...) are preferably linear or vertical segments, so that there is a longitudinal or transverse division of the sulfur trap, i.e. H. results in a linearly segmented sulfur trap and a vertically segmented sulfur trap.
  • a sulfur trap according to the invention preferably has an essentially round or oval cross-sectional shape.
  • an exhaust gas purification device with a NOx storage catalytic converter has a sulfur trap according to the invention upstream of the NOx storage catalytic converter. It is also possible that the upstream sulfur trap is an integral part of the NOx storage catalytic converter.
  • the segments are each individually or in disjoint groups (2a, 2b, 2c, ...; 4a, 4b, 4c, ...) in successive and spaced-apart periods Intervals heated to de-sulfation temperature in a reducing, stoichiometric or slightly lean environment.
  • the segments of the sulfur trap are heated individually or in disjoint groups at successive and spaced intervals to desulfurization temperature when the NOx storage catalyst is in a Regeneration phase.
  • the heating process of a corresponding segment or a corresponding group of segments (2a, 2b, 2c, ...; 4a, 4b, 4c, ...) can be initiated before the regeneration phase of the NOx storage catalytic converter begins.
  • Fig. 1 shows a first embodiment of a sulfur trap according to the invention in perspective and schematic representation
  • Fig. 2 shows a second embodiment of a sulfur trap according to the invention in perspective and schematic representation.
  • Fig. 1 shows a vertically segmented sulfur trap 1, which is part of an exhaust gas purification system, not shown, and is located in the exhaust system of an internal combustion engine, which is preferably a direct-injection internal combustion engine that can be operated with gasoline or diesel fuel.
  • the sulfur trap 1 is arranged in the flow path of the exhaust gas of the exhaust system, i. that is, in their exhaust pipe.
  • the sulfur trap 1 is part of an exhaust gas cleaning device, not shown, which has a NOx storage catalytic converter, the sulfur trap 1 being connected upstream of the NOx storage catalytic converter.
  • the storage catalytic converter 1 has a plurality of linearly arranged segments 2a, 2b,
  • Heater (not shown) are heated.
  • Fig. 2 shows a linearly segmented sulfur trap 3, the segments 4a, 4b,
  • 4c is greater than 1.
  • Two or more, e.g. 16, segments 2a, 2b, 2c or 4a, 4b, 4c may be provided.
  • the segments 2a, 2b, 2c or 4a, 4b, 4c can also be arranged in groups, for example a group with the elements 2a, 2c and one with the elements 2b and 2d etc. in the case of the vertically segmented sulfur trap 1. This can be achieved by interconnecting the corresponding heating elements. The same applies in the case of the linearly segmented sulfur trap 3.
  • the heating devices are put into operation by the control device in a certain order.
  • the storage catalytic converter 1 In normal operating mode, the storage catalytic converter 1 is operated to absorb NOx at a certain temperature, the level of which depends on the material of the catalytic converter. In the case of a barium-containing storage catalytic converter 1, the desulfating temperature is approximately 650 ° C., and in the case of a potassium-containing storage catalytic converter it is approximately 800 ° C. These materials are also advantageous for a storage catalytic converter 1 according to the invention.
  • NOx is deposited on the surface of the catalytic converter when the internal combustion engine is lean.
  • a regeneration process of the Storage catalytic converter are performed, which takes place with reducing, stoichiometric or slightly lean exhaust gas.
  • the sulfur trap 1, 3 are desulfurized
  • Segments 2a, 2b, 2c and 4a, 4b, 4c are heated to the desulphation temperature one after the other at certain time intervals each time during a NOx regeneration process.
  • the time intervals between these partial de-sulfations are determined so that all sections 2a, 2b, 2c and 4a, 4b, 4c are desulfurized one after the other, so that the SOx absorption capacity of sulfur trap 1, 3 is not significantly impaired or fails . Due to the lower heating power required, the vehicle electrical system of the associated vehicle can serve as an energy source.
  • the sulfur trap according to the invention is particularly suitable for a NOx storage catalytic converter which is preceded by the sulfur trap according to the invention.
  • the segments 2a, 2b, 2c and 4a, 4b, 4c of the sulfur trap are desulfurized in a specific order each time a regeneration process of the NOx storage catalytic converter is carried out.
  • a partial de-sulfation is carried out with each NOx regeneration process, i. H. a segment 2a, 2b, 2c and 4a, 4b, 4c desulfurized.
  • the activation or energization of the segment 2a, 2b, 2c or 4a, 4b, 4c to be desulfurized can start before the NOx regeneration is initiated.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)

Abstract

L'invention concerne un piège à soufre pour un système de purification des gaz d'échappement d'un moteur à combustion interne. Ce piège à soufre est divisé en n > 1 segments disjoints, un dispositif de chauffage étant associé à chacun de ces segments. Le dispositif de chauffage de chaque segment peut être commandé de manière individuelle, chaque segment étant ainsi chauffé séparément jusqu'à ce qu'il atteigne la température de désulfatation. Ce type de piège à soufre est monté en amont d'un catalyseur accumulateur de NOx, au moins un segment dudit piège à soufre étant porté à la température de désulfatation pendant la phase de régénération du catalyseur accumulateur.
PCT/EP1999/008672 1998-11-28 1999-11-11 Piege a soufre et desulfatation d'un systeme de purification des gaz d'echappement d'un moteur a combustion interne Ceased WO2000032912A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19855089.8 1998-11-28
DE1998155089 DE19855089B4 (de) 1998-11-28 1998-11-28 Schwefelfalle für ein Abgasreinigungssystem einer Brennkraftmaschine und Verfahren zum Betreiben der Schwefelfalle

Publications (1)

Publication Number Publication Date
WO2000032912A1 true WO2000032912A1 (fr) 2000-06-08

Family

ID=7889430

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1999/008672 Ceased WO2000032912A1 (fr) 1998-11-28 1999-11-11 Piege a soufre et desulfatation d'un systeme de purification des gaz d'echappement d'un moteur a combustion interne

Country Status (2)

Country Link
DE (1) DE19855089B4 (fr)
WO (1) WO2000032912A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010026018A1 (fr) * 2008-08-25 2010-03-11 Torsten Schlicht Procédé et installation de gaz d’échappement pour l’épuration de gaz d’échappement contenant des sox, en particulier provenant des moteurs à combustion interne de bateaux

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6123691A (ja) * 1984-07-12 1986-02-01 Tokyo Gas Co Ltd ガスの乾式脱硫塔
JPS6411626A (en) * 1987-07-02 1989-01-17 Electric Power Dev Co Treatment of flue-gas and equipment thereof
JPH0576771A (ja) * 1991-09-24 1993-03-30 Mazda Motor Corp 排気ガス浄化用触媒装置
WO1993013303A1 (fr) * 1991-12-20 1993-07-08 Per Stobbe Ensemble filtre et corps de filtre destines a filtrer les gaz d'echappement de moteurs diesel
JPH06229231A (ja) * 1993-02-03 1994-08-16 Toyota Motor Corp 内燃機関の排気浄化装置
WO1998007504A1 (fr) * 1996-08-19 1998-02-26 Volkswagen Aktiengesellschaft ADSORBANT DE NOx

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8816514U1 (de) * 1988-04-25 1989-10-26 Emitec Gesellschaft für Emissionstechnologie mbH, 5204 Lohmar Elektrisch beheizbarer Katalysator-Trägerkörper
JP2605553B2 (ja) * 1992-08-04 1997-04-30 トヨタ自動車株式会社 内燃機関の排気浄化装置
US5792436A (en) * 1996-05-13 1998-08-11 Engelhard Corporation Method for using a regenerable catalyzed trap
DE19627609A1 (de) * 1996-07-09 1998-01-15 Johann Schaeffer Katalysator für die Abluftreinigung
DE19731131A1 (de) * 1997-07-19 1999-01-21 Volkswagen Ag Verfahren und Vorrichtung zur Regeneration einer Schwefelfalle

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6123691A (ja) * 1984-07-12 1986-02-01 Tokyo Gas Co Ltd ガスの乾式脱硫塔
JPS6411626A (en) * 1987-07-02 1989-01-17 Electric Power Dev Co Treatment of flue-gas and equipment thereof
JPH0576771A (ja) * 1991-09-24 1993-03-30 Mazda Motor Corp 排気ガス浄化用触媒装置
WO1993013303A1 (fr) * 1991-12-20 1993-07-08 Per Stobbe Ensemble filtre et corps de filtre destines a filtrer les gaz d'echappement de moteurs diesel
JPH06229231A (ja) * 1993-02-03 1994-08-16 Toyota Motor Corp 内燃機関の排気浄化装置
WO1998007504A1 (fr) * 1996-08-19 1998-02-26 Volkswagen Aktiengesellschaft ADSORBANT DE NOx

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 010, no. 172 (C - 354) 18 June 1986 (1986-06-18) *
PATENT ABSTRACTS OF JAPAN vol. 013, no. 182 (C - 591) 27 April 1989 (1989-04-27) *
PATENT ABSTRACTS OF JAPAN vol. 017, no. 400 (C - 1089) 27 July 1993 (1993-07-27) *
PATENT ABSTRACTS OF JAPAN vol. 018, no. 607 (M - 1707) 18 November 1994 (1994-11-18) *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010026018A1 (fr) * 2008-08-25 2010-03-11 Torsten Schlicht Procédé et installation de gaz d’échappement pour l’épuration de gaz d’échappement contenant des sox, en particulier provenant des moteurs à combustion interne de bateaux

Also Published As

Publication number Publication date
DE19855089A1 (de) 2000-05-31
DE19855089B4 (de) 2008-09-04

Similar Documents

Publication Publication Date Title
EP0931922B1 (fr) Procédé et dispositif d' épuration de gaz d' échappement d'un moteur à combustion interne
DE19731623B4 (de) Verfahren und Vorrichtung zur De-Sulfatierung von NOx-Speichern bei Dieselmotoren
EP1088157B1 (fr) PROCEDE DE DESULFATATION D'UN CATALYSEUR ACCUMULATEUR DE NO x?
EP3551857B1 (fr) Procédé d'opération d'un catalyseur électriquement chauffé
DE10040554B4 (de) Verfahren zum Betrieb einer Abgasreinigungsanlage mit Partikelfilter und Stickoxidspeicher
DE19961165A1 (de) Verfahren zur Entschwefelung eines in einem Abgaskanal einer Verbrennungskraftmaschine angeordneten NO¶x¶-Speicherkatalysators
WO2000071864A1 (fr) Procede de desulfatation d'un accumulateur d'oxydes azotiques ou d'oxydes de soufre faisant partie d'une installation de purification de gaz d'echappement
EP1194683B1 (fr) Procede de commande d'un mode de fonctionnement d'un moteur a combustion interne
EP2358983B1 (fr) Procédé de régénération d'un dispositif de dépôt de particules ouvert
EP1133622B1 (fr) Procede pour reduire la proportion de constituants nocifs de gaz d'echappement dans un systeme de purification de gaz d'echappement d'un moteur a combustion interne
DE19855092B4 (de) Vorrichtung und Verfahren zum Reinigen des Abgases einer Brennkraftmaschine
WO2020074292A1 (fr) Catalyseur de gaz d'échappement à chauffage électrique et procédé permettant de faire fonctionner un tel catalyseur
DE102015219114A1 (de) Verfahren und Vorrichtung zur Abgasnachbehandlung einer Brennkraftmaschine
DE19855089B4 (de) Schwefelfalle für ein Abgasreinigungssystem einer Brennkraftmaschine und Verfahren zum Betreiben der Schwefelfalle
DE10101593B4 (de) Verfahren zum Betreiben eines mit direkter Kraftstoffeinspritzung in den Brennraum versehenen Verbrennungsmotors
DE10003903B4 (de) Vorrichtung und Verfahren zur Steuerung eines Betriebes eines Mehrzylindermotors für Kraftfahrzeuge mit einer mehrflutigen Abgasreinigungsanlage
DE102015219113A1 (de) Verfahren und Vorrichtung zur Abgasnachbehandlung eines Verbrennungsmotors
DE102008034992A1 (de) Verfahren zum Entschwefeln eines NOX-Speicherkatalysators
DE102019200367B4 (de) Verfahren zum Bestimmen von Regenerationsparameterwerten eines Mehrfach-LNT-Katalysatorsystems und Vorrichtung zur Datenverarbeitung
DE10038458B4 (de) Vorrichtung und Verfahren zur Abgasreinigung
EP1544430A1 (fr) Procédé d'exploitation d'un catalyseur de stockage de NOx
DE10307338A1 (de) Verfahren zum Betrieb einer Brennkraftmaschine und Abgasanlage für den Betrieb der Brennkraftmaschine
EP1235977A1 (fr) Procede et dispositif pour commander une phase de chauffage d'au moins un catalyseur place dans le canal d'echappement des gaz d'un moteur a combustion interne
DE10347446B4 (de) Verfahren zur Aufheizung und zur Desulfatisierung eines Hauptkatalysators einer mehrflutigen Abgaslage einer mehrzylindrigen Brennkraftmaschine eines Fahrzeugs, insbesondere eines Kraftfahrzeugs
DE102018203300A1 (de) Steuern einer Abgasnachbehandlung

Legal Events

Date Code Title Description
AK Designated states

Kind code of ref document: A1

Designated state(s): CN IN JP KR US

AL Designated countries for regional patents

Kind code of ref document: A1

Designated state(s): AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE

DFPE Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101)
121 Ep: the epo has been informed by wipo that ep was designated in this application
122 Ep: pct application non-entry in european phase