EP1225312A3 - Device for treating an exhaust gas from a combustion engine - Google Patents

Device for treating an exhaust gas from a combustion engine Download PDF

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Publication number
EP1225312A3
EP1225312A3 EP01403246A EP01403246A EP1225312A3 EP 1225312 A3 EP1225312 A3 EP 1225312A3 EP 01403246 A EP01403246 A EP 01403246A EP 01403246 A EP01403246 A EP 01403246A EP 1225312 A3 EP1225312 A3 EP 1225312A3
Authority
EP
European Patent Office
Prior art keywords
combustion engine
treating
substance
exhaust gas
exhaust gases
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.)
Granted
Application number
EP01403246A
Other languages
German (de)
French (fr)
Other versions
EP1225312A2 (en
EP1225312B1 (en
Inventor
Shanin Hodjati
Najar Moral
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.)
Renault SAS
Original Assignee
Renault SAS
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 Renault SAS filed Critical Renault SAS
Publication of EP1225312A2 publication Critical patent/EP1225312A2/en
Publication of EP1225312A3 publication Critical patent/EP1225312A3/en
Application granted granted Critical
Publication of EP1225312B1 publication Critical patent/EP1225312B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F01N3/0842—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
    • F01N3/0814—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
    • F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
    • F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support

Abstract

L'invention concerne un dispositif de traitement (10) des gaz d'échappement (G) d'un moteur à combustion du type qui est inséré dans la ligne d'échappement (14) et qui comporte un élément de support (18) qui est traversé d'amont en aval par les gaz d'échappement (G) et qui est revêtu d'un mélange constitué d'au moins une première substance (20) qui permet l'oxydation du monoxyde d'azote en dioxyde d'azote et d'une seconde substance (22) qui permet le stockage du dioxyde d'azote, caractérisé en ce que la concentration de la première substance (20) dans le mélange est décroissante de l'amont vers l'aval de l'élément de structure (18) de façon à améliorer la capacité de stockage du dioxyde d'azote du dispositif de traitement (10), notamment lorsque la température des gaz d'échappement (G) est inférieure à 400°C.

Figure 00000001
The invention relates to a device (10) for treating exhaust gases (G) of a combustion engine of the type which is inserted into the exhaust line (14) and which comprises a support element (18) which is crossed from upstream to downstream by the exhaust gases (G) and which is coated with a mixture consisting of at least one first substance (20) which allows the oxidation of nitrogen monoxide to nitrogen dioxide and a second substance (22) which allows the storage of nitrogen dioxide, characterized in that the concentration of the first substance (20) in the mixture decreases from upstream to downstream of the element structure (18) so as to improve the nitrogen dioxide storage capacity of the treatment device (10), in particular when the temperature of the exhaust gases (G) is less than 400 ° C.
Figure 00000001
EP20010403246 2000-12-22 2001-12-14 Device for treating an exhaust gas from a combustion engine Expired - Lifetime EP1225312B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0016862A FR2818688B1 (en) 2000-12-22 2000-12-22 DEVICE FOR TREATING THE EXHAUST GASES OF A COMBUSTION ENGINE
FR1686200 2000-12-22
FR0016862 2000-12-22

Publications (3)

Publication Number Publication Date
EP1225312A2 EP1225312A2 (en) 2002-07-24
EP1225312A3 true EP1225312A3 (en) 2004-05-19
EP1225312B1 EP1225312B1 (en) 2006-03-01

Family

ID=8858072

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20010403246 Expired - Lifetime EP1225312B1 (en) 2000-12-22 2001-12-14 Device for treating an exhaust gas from a combustion engine

Country Status (3)

Country Link
EP (1) EP1225312B1 (en)
DE (1) DE60117509T2 (en)
FR (1) FR2818688B1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003013732A (en) * 2001-07-02 2003-01-15 Toyota Motor Corp Exhaust emission purifier for internal combustion engine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0716876A1 (en) * 1994-12-16 1996-06-19 Toyota Jidosha Kabushiki Kaisha Catalyst for purifying exhaust gases
JPH08215545A (en) * 1995-02-16 1996-08-27 Kobe Steel Ltd Method for removing nitrogen monoxide
WO1998010177A1 (en) * 1996-09-05 1998-03-12 Volkswagen Aktiengesellschaft Exhaust fume purification process for an internal combustion engine
EP1033161A1 (en) * 1999-02-25 2000-09-06 DORNIER GmbH Process and device for adsorption of nitrogen oxides contained in a gas

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0716876A1 (en) * 1994-12-16 1996-06-19 Toyota Jidosha Kabushiki Kaisha Catalyst for purifying exhaust gases
JPH08215545A (en) * 1995-02-16 1996-08-27 Kobe Steel Ltd Method for removing nitrogen monoxide
WO1998010177A1 (en) * 1996-09-05 1998-03-12 Volkswagen Aktiengesellschaft Exhaust fume purification process for an internal combustion engine
EP1033161A1 (en) * 1999-02-25 2000-09-06 DORNIER GmbH Process and device for adsorption of nitrogen oxides contained in a gas

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 12 26 December 1996 (1996-12-26) *

Also Published As

Publication number Publication date
EP1225312A2 (en) 2002-07-24
DE60117509D1 (en) 2006-04-27
EP1225312B1 (en) 2006-03-01
FR2818688B1 (en) 2003-06-27
FR2818688A1 (en) 2002-06-28
DE60117509T2 (en) 2006-08-31

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