WO2004044395A1 - Dispositif pour purifier des gaz d'echappement d'un vehicule automobile - Google Patents

Dispositif pour purifier des gaz d'echappement d'un vehicule automobile Download PDF

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Publication number
WO2004044395A1
WO2004044395A1 PCT/DE2003/002338 DE0302338W WO2004044395A1 WO 2004044395 A1 WO2004044395 A1 WO 2004044395A1 DE 0302338 W DE0302338 W DE 0302338W WO 2004044395 A1 WO2004044395 A1 WO 2004044395A1
Authority
WO
WIPO (PCT)
Prior art keywords
storage
region
exhaust gas
motor vehicle
filter
Prior art date
Application number
PCT/DE2003/002338
Other languages
German (de)
English (en)
Inventor
Markus Widenmeyer
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2004044395A1 publication Critical patent/WO2004044395A1/fr

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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
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/022—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
    • F01N3/0222—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous the structure being monolithic, e.g. honeycombs
    • 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
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/0231—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using special exhaust apparatus upstream of the filter for producing nitrogen dioxide, e.g. for continuous filter regeneration systems [CRT]
    • 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
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
    • F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
    • 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
    • F01N3/0814—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with catalytic converters, e.g. NOx absorption/storage reduction catalysts
    • 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
    • F01N2250/00—Combinations of different methods of purification
    • F01N2250/02—Combinations of different methods of purification filtering and catalytic conversion
    • 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
    • F01N2250/00—Combinations of different methods of purification
    • F01N2250/14—Combinations of different methods of purification absorption or adsorption, and filtering
    • 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
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/06—Ceramic, e.g. monoliths
    • 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
    • F01N2510/00—Surface coverings
    • F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
    • F01N2510/065—Surface coverings for exhaust purification, e.g. catalytic reaction for reducing soot ignition temperature

Definitions

  • the invention relates to a device for cleaning exhaust gases from a motor vehicle.
  • the reduction of NO x and particle emissions is a problem when the exhaust gas limit values are reached.
  • a denitrification process based on the effect of a NO x storage catalytic converter is being tested.
  • the nitrogen oxides are generally adsorbed and the adsorbed
  • Nitrogen oxides are periodically reductively desorbed from the storage within short fat phases and implemented on the catalyst.
  • the prior art therefore tries to protect the catalyst from sulfur.
  • One possibility is to eliminate sulfur components in the fuel.
  • residual amounts of more than 5 ppm of sulfur remain in the fuel.
  • a known measure provides for so-called SO x traps to be provided in the exhaust tract in order to protect the NO x storage catalytic converter from sulfur. It has been found expedient to provide a spatial separation between the S0 X - to realize trap and the NO x storage, so that the SO x - containing exhaust gas first comes with the SO x trap in contact. It is also known to use a NO x
  • each line contains a NO x store and an upstream SO x store. It is arranged upstream of the NO x storage catalyst during the SO x -Ein Grandeung the SO x storage.
  • Regeneration is achieved in a reverse order using a flap system.
  • N0 X reduction methods may no longer suffice for future exhaust gas regulations.
  • the installation of post-engine NO x and particle reduction devices may be necessary for these vehicles.
  • Several models, for example catalysts or filters, have to be connected in series in the exhaust line, which is costly and space-intensive and can furthermore lead to high pressure losses in the exhaust line.
  • Catalyst device a particle filter and a heat transfer device.
  • a particle filter body which has or carries an area which is designed for SO x storage.
  • SO x traps or SO x stores preferably contain moderately to strongly basic element oxides, for example their hydroxides, carbonates, such as SrO, CaO, Li 2 O, MgO, Ag 2 O or compounds of the later rare earths as well as Sc and Y.
  • moderately to strongly basic element oxides for example their hydroxides, carbonates, such as SrO, CaO, Li 2 O, MgO, Ag 2 O or compounds of the later rare earths as well as Sc and Y.
  • a second region is optionally additionally provided, which serves as a NO x storage catalytic converter.
  • Embodiments are thus SO x traps integrated in a particle filter provided with a NO x storage catalyst function, the NO x and SO x storage being spatially separated from one another.
  • a NO x storage function and an SO x storage function are combined on a particle filter and the NO x storage catalytic converter is protected against sulfur.
  • the first area which is designed for SO x storage, is expediently arranged upstream of the second area, which serves as a NO x storage catalytic converter.
  • the first region preferably also performs a soot oxidation function.
  • the use of silver and other components that are mobile or fluid at temperatures between 200 ° C and 600 ° C is recommended.
  • Precious metals intended for oxidation This causes an effective oxidation of S0 2 and S0 3 and furthermore an oxidation of NO to N0 2 .
  • Precious metals in particular platinum and other redox-active compounds, such as, for example, vanadium oxides, are advantageously provided for this.
  • the downstream SO x storage function can be additionally modified so that it lowers the burn-off temperature of the soot accumulated on the filter or with a lower the burn-off temperature of the soot accumulated on the filter
  • Catalyst formulation is combined.
  • the combination of soot oxidation and SO x storage function can be achieved by successively coating the catalyst components, by mechanical mixing and subsequent coating, by combining the active components on a washcoat, by generating mixed phases, for example by means of the sol-gel process. or by supporting one component on the other so that one component serves as a washcoat.
  • the device according to the invention can be designed, for example, as a wall flow particle filter or as a foam or depth filter or as a combination of these particle filter types his.
  • filters By combining filters with SO x storage, regeneration of filter and SQ ⁇ storage can be carried out synchronously.
  • the SO x storage is realized in a space-saving manner and spatially separated from the NO x storage catalytic converter on a filter medium. Catalytic material can be used efficiently by using it for SO x storage and soot oxidation.
  • regeneration of the SO x storage and regeneration of the NO x storage can be carried out synchronously.
  • the device according to the invention enables an effective combination of a NO x storage catalytic converter and a soot filter function, in which one
  • Figure 1 shows a preferred embodiment of the device according to the invention in a sectional view.
  • the device shown is designed as a wall flow particle filter 10. This comprises a gas inlet channel 12 and a gas outlet channel 14.
  • the structure of the particle filter 10 is defined by a porous wall 16 which effects the filter effect.
  • the porous wall 16 is coated with a first area 18, which performs the SO x storage function and possibly a soot oxidation function.
  • the porous wall 16 is provided with a second region 20, namely a NO x
  • Storage catalyst coating provided or coated.
  • the exhaust gas flows from above into the gas inflow channel 12, penetrates the first area 18, the porous wall 16 and the second area 20 and finally flows out of the gas outflow channel 14 below.
  • a plurality of gas inlet channels 12 or a plurality of gas outlet channels 14 can be arranged in parallel and next to one another alternately, the gas inlet channels on the upstream side of the filter being open and the gas outlet channels on the downstream side of the filter being open.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Processes For Solid Components From Exhaust (AREA)

Abstract

La présente invention concerne un dispositif (10) pour purifier des gaz d'échappement d'un véhicule automobile. Le dispositif présente un corps filtrant, une première zone (18) servant à l'accumulation de SOx.
PCT/DE2003/002338 2002-11-13 2003-07-11 Dispositif pour purifier des gaz d'echappement d'un vehicule automobile WO2004044395A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10252733.4 2002-11-13
DE2002152733 DE10252733A1 (de) 2002-11-13 2002-11-13 Vorrichtung zum Reinigen von Abgasen eines Kraftfahrzeugs

Publications (1)

Publication Number Publication Date
WO2004044395A1 true WO2004044395A1 (fr) 2004-05-27

Family

ID=32185578

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE2003/002338 WO2004044395A1 (fr) 2002-11-13 2003-07-11 Dispositif pour purifier des gaz d'echappement d'un vehicule automobile

Country Status (2)

Country Link
DE (1) DE10252733A1 (fr)
WO (1) WO2004044395A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102005029799A1 (de) * 2005-06-27 2007-01-11 Volkswagen Ag Vorrichtung zur Reinigung des Abgases einer Brennkraftmaschine und Verfahren zur Regeneration der Vorrichtung
DE102017103341A1 (de) * 2017-02-17 2018-08-23 Umicore Ag & Co. Kg Russpartikelfilter mit speicherzellen für katalysator

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989003720A1 (fr) * 1987-10-23 1989-05-05 Massachusetts Institute Of Technology Procedes et dispositifs de nettoyage de gaz
FR2819549A1 (fr) * 2001-01-12 2002-07-19 Renault Systeme de traitement des gaz d'echappement d'un moteur a combustion
GB2375058A (en) * 2001-03-29 2002-11-06 Daimler Chrysler Ag Exhaust gas particle filter

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1989003720A1 (fr) * 1987-10-23 1989-05-05 Massachusetts Institute Of Technology Procedes et dispositifs de nettoyage de gaz
FR2819549A1 (fr) * 2001-01-12 2002-07-19 Renault Systeme de traitement des gaz d'echappement d'un moteur a combustion
GB2375058A (en) * 2001-03-29 2002-11-06 Daimler Chrysler Ag Exhaust gas particle filter

Also Published As

Publication number Publication date
DE10252733A1 (de) 2004-05-27

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