[go: up one dir, main page]

WO2008135354A1 - Tube-enveloppe destiné à un système de gaz d'échappement d'un moteur à combustion interne, et corps en nid d'abeilles et système de gaz d'échappement comprenant au moins un tube-enveloppe, et procédé de production d'un tube-enveloppe - Google Patents

Tube-enveloppe destiné à un système de gaz d'échappement d'un moteur à combustion interne, et corps en nid d'abeilles et système de gaz d'échappement comprenant au moins un tube-enveloppe, et procédé de production d'un tube-enveloppe Download PDF

Info

Publication number
WO2008135354A1
WO2008135354A1 PCT/EP2008/054557 EP2008054557W WO2008135354A1 WO 2008135354 A1 WO2008135354 A1 WO 2008135354A1 EP 2008054557 W EP2008054557 W EP 2008054557W WO 2008135354 A1 WO2008135354 A1 WO 2008135354A1
Authority
WO
WIPO (PCT)
Prior art keywords
jacket tube
tube
casing pipe
steel
exhaust gas
Prior art date
Application number
PCT/EP2008/054557
Other languages
German (de)
English (en)
Inventor
Carsten Kruse
Original Assignee
Emitec Gesellschaft Für Emissionstechnologie Mbh
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 Emitec Gesellschaft Für Emissionstechnologie Mbh filed Critical Emitec Gesellschaft Für Emissionstechnologie Mbh
Publication of WO2008135354A1 publication Critical patent/WO2008135354A1/fr

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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features
    • F01N13/16—Selection of particular materials
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features having two or more separate purifying devices arranged in series
    • 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
    • F01N13/00—Exhaust or silencing apparatus characterised by constructional features
    • F01N13/08—Other arrangements or adaptations of exhaust conduits
    • 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
    • F01N2240/40—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 a hydrolysis catalyst
    • 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
    • F01N2610/00—Adding substances to exhaust gases
    • F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
    • 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
    • F01N3/18—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 methods of operation; Control
    • F01N3/20—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 methods of operation; Control specially adapted for catalytic conversion
    • F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
    • F01N3/2066—Selective catalytic reduction [SCR]

Definitions

  • Jacket tube for use in an exhaust system of an internal combustion engine, and honeycomb body and exhaust system comprising at least one jacket tube and a method for producing a jacket tube
  • the present invention is a jacket tube for use in the exhaust system of an internal combustion engine, and a honeycomb body comprising such a jacket tube and an exhaust system comprising such a jacket tube or such a honeycomb body. Furthermore, a method for producing such a jacket tube is described.
  • the objects according to the invention can be used particularly advantageously in the exhaust system of internal combustion engines of automobiles.
  • the exhaust gas is passed through a flow-through structure, which is catalytically active or is correspondingly catalytically coated.
  • SCR selective catalytic reduction
  • a selectively acting on nitrogen oxides reducing agent is added to the exhaust gas.
  • a reducing agent precursor may also be added.
  • One possible reducing agent is ammonia, a potential reducing agent precursor urea.
  • the inventive jacket tube is used in an exhaust system of an internal combustion engine.
  • the jacket tube comprises an inner and at least one outer jacket tube.
  • the inner jacket tube is made of an austenitic steel and the outer jacket tube is made of a ferritic steel.
  • the ability of the jacket tube for use in an exhaust system of an internal combustion engine in particular means that the jacket pipe temperature-stable at the pressure prevailing in the exhaust system of an internal combustion engine temperatures of 400 0 C and more preferably 800 0 C and more, particularly preferably 1,000 0 C and more is ,
  • the jacket tube according to the invention has the advantage that the inner austenitic jacket tube ensures corrosion resistance, in particular against urea and / or ammonia, while the ferritic outer jacket tube made of less expensive material ensures the mechanical stability.
  • An austenitic material is understood as meaning, in particular, a steel in which a maximum of 2.06% by weight (by weight) of carbon is contained and which has a cubic face-centered crystal structure.
  • a ferritic steel is understood in particular to mean a steel which contains up to 0.1% by weight of carbon and has a cubic body-centered crystal structure.
  • the austeni- zier steel comprises at least one of the following materials: a) a steel with material number 1.4828 and b) a steel with material number 1.4301.
  • a steel with material number 1.4828 is understood to mean a steel which has a max. 0.2% by weight (weight%) of carbon, 1.5 to 2.5% by weight of silicon, maximum of 2% by weight of manganese, maximum of 0.045% by weight of phosphorus, maximum of 0.03% by weight % Sulfur, 19 to 21% by weight chromium and 11 to 13% by weight nickel.
  • a steel with material number 1.4301 is understood as meaning a steel which has a maximum of 0.07% by weight of carbon, a maximum of 1% by weight of silicon, a maximum of 2% by weight of manganese, a maximum of 0.045% by weight of phosphorus, 17 to 19, 5 wt .-% chromium, 8 to 10.5 wt .-% nickel and at most 0.11 wt .-% nitrogen.
  • the material numbers are given in particular according to DIN EN 10027-2. This composition of austenitic steel has proven to be particularly advantageous in ensuring corrosion resistance.
  • the ferritic steel comprises a steel with the material number 1.4509.
  • a steel with the material number 1.4509 is understood in particular to mean a steel which has a maximum of 0.03% by weight of carbon, a maximum of 1% by weight of silicon, a maximum of 1% by weight of manganese, a maximum of 0.04% by weight of phosphorus, not more than 0.015% by weight of sulfur, 17.5 to 18.5% by weight of chromium, 0.1 to 0.6% by weight of titanium and 0.35 to 1% by weight of niobium.
  • This composition of a ferritic steel has proved to be advantageous in the production of a mechanically stable outer jacket tube.
  • the inner jacket tube has a thickness of 0.1 mm to 0.8 mm.
  • a thickness of 0.5 mm has proven to be particularly advantageous.
  • a thus relatively thin inner jacket tube made of an austenitic material is thus sufficient to achieve a sufficient corrosion resistance.
  • the outer jacket tube has a thickness of 1 mm to 3 mm.
  • a thickness of about 1.5 mm has proven to be advantageous.
  • the non-corrosion-resistant ferritic material of the outer jacket tube does not come in contact with corrosive substances in the exhaust gas due to the inner jacket tube, so that the corrosion resistance of the inventive jacket tube is given.
  • a further embodiment of the jacket tube according to the invention has a ratio, at least in some areas
  • the formation of a gap between the inner and outer jacket tube can advantageously allow a thermal insulation, which slows down a cooling of a honeycomb formed inside the jacket tube after reaching the starting temperature.
  • the outer jacket tube and the inner jacket tube are connected directly, at least in some areas, to one another in at least one of the following ways: a) non-positively; b) positive and c) cohesive.
  • Direct in this context means, in particular, that no further component is provided between the inner jacket tube and the outer jacket tube, so that there is at least partial direct contact between inner jacket tube and outer jacket tube so-called “brazing") or by welding.
  • the combination with a frictional connection, in particular a frictional connection, with cohesive connections is advantageous possible.
  • the outer jacket tube has recesses at least in partial areas.
  • such recesses include holes in the outer jacket tube, which do not affect the mechanical stability of the entire jacket tube, however, lead to a reduction in weight and material when creating the jacket tube.
  • the costs can be further reduced when creating the jacket tube, especially in mobile applications such as in the exhaust system of automobiles, the weight reduction is advantageous.
  • a honeycomb body which comprises at least one jacket tube according to the invention and comprises at least one honeycomb structure arranged at least partially within the jacket tube and permeable to an exhaust gas.
  • a honeycomb structure is understood to mean in particular ceramic monolithic honeycomb structures and / or honeycomb structures which are produced by twisting or winding metallic layers.
  • the honeycomb structure may have at least partially porous walls between channels formed in the honeycomb structure.
  • the honeycomb structure comprises, at least in some areas, a catalytically active coating which catalyzes at least one of the following reactions:
  • the coating is a coating that catalyzes the hydrolysis of urea to ammonia.
  • a reducing agent precursor is understood as meaning a substance or mixture of substances which comprises at least one of the following substances:
  • a reducing agent precursor may also be a derivative of at least one of the abovementioned substances a) to j).
  • an exhaust system which comprises at least one honeycomb body according to the invention and / or a jacket tube according to the invention.
  • a method for producing a jacket tube according to the invention in which an austenitic inner jacket tube with at least one ferritic outer
  • Jacket tube at least in some areas by at least one of the following
  • the cohesive connection is understood to be a soldering process (the so-called “brazing”) and / or a welding process.
  • Fig. 1 a first embodiment of a jacket tube according to the invention
  • Fig. 2 an embodiment of a honeycomb body according to the invention
  • Fig. 3 an erf ⁇ ndungsconcees exhaust system.
  • 1 shows an exemplary embodiment of a jacket pipe 1 according to the invention for use in an exhaust system of an internal combustion engine.
  • the jacket tube 1 comprises an inner jacket tube 2 and an outer jacket tube 3.
  • the inner jacket tube 2 is formed of an austenitic steel and the outer jacket tube 3 of a ferritic steel.
  • the outer jacket tube 3 has a thickness 4, while the inner jacket tube 2 has a thickness 5.
  • the thickness 4 of the outer jacket tube is greater than the thickness 5 of the inner jacket tube.
  • the ratio of the thickness 4 to the thickness 5 is in the range of 3 to 10.
  • FIG. 2 shows an exemplary embodiment of a honeycomb body 6 according to the invention.
  • the honeycomb body 6 comprises a honeycomb structure 7, which can be flowed through for an exhaust gas, which is arranged in a jacket tube 1 according to the invention and is connected thereto at least in partial areas.
  • the honeycomb structure 7 protrudes partially beyond the jacket tube 1, but it is also possible to form the honeycomb structure 7 completely in the interior of the jacket tube 1.
  • the honeycomb structure 7 has conventional, not shown here, channels or cavities through which an exhaust gas from a first end face 8 to a second end face 9 of the honeycomb body can flow.
  • the outer jacket tube 3 preferably has recesses 10, which lead to a weight reduction of the jacket tube 1.
  • the jacket tube 1 has a portion 11, in the inner 2 and outer jacket tube 3 do not abut each other. In this portion 11 have inner 2 and outer casing 3 so a radial distance 12.
  • FIG. 3 shows an inventive exhaust system 13.
  • This comprises a honeycomb body 6 according to the invention with a first honeycomb structure 14 and a second honeycomb structure 15.
  • a reducing agent precursor feed 16 is formed via which urea water solution is preferably supplied to the exhaust system 13.
  • the first honeycomb structure 14 has a hydrolysis catalyst coating that catalyzes the hydrolysis of the urea to ammonia.
  • the second honeycomb structure 15 preferably has an SCR coating. In the second honeycomb structure 15 takes place so the conversion of nitrogen oxides present in the exhaust gas with the ammonia produced in the first honeycomb structure 14.
  • the jacket tube 1 is formed to the reducing agent precursor addition 16, the leaking urea water solution 17 in each case, the inner jacket tube 2 made of austenitic steel strikes, so that the corrosion of the jacket tube 1 is effectively avoided.
  • the jacket tube 1 according to the invention advantageously allows the construction of inventive honeycomb bodies 6 and exhaust gas systems 13 according to the invention, in which the corrosion of the jacket tube 1, for example by urea water solution 17, is effectively prevented.

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)
  • Exhaust Silencers (AREA)

Abstract

L'invention concerne un tube-enveloppe (1) destiné à être utilisé dans un système de gaz d'échappement d'un moteur à combustion interne, le tube-enveloppe comprenant un tube-enveloppe intérieur (2) et au moins un tube-enveloppe extérieur (3). L'invention est caractérisée en ce que le tube-enveloppe intérieur (2) est constitué par un acier austénitique, et le tube-enveloppe extérieur (3) est constitué par un acier ferritique. Le tube-enveloppe (1) selon l'invention permet de construire avantageusement des corps en nid d'abeilles (6) selon l'invention, et des systèmes de gaz d'échappement (13) selon l'invention, pour lesquels la corrosion du tube-enveloppe (1) est empêchée efficacement, par exemple, au moyen d'une solution aqueuse d'urée (17).
PCT/EP2008/054557 2007-05-08 2008-04-15 Tube-enveloppe destiné à un système de gaz d'échappement d'un moteur à combustion interne, et corps en nid d'abeilles et système de gaz d'échappement comprenant au moins un tube-enveloppe, et procédé de production d'un tube-enveloppe WO2008135354A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102007022068.7 2007-05-08
DE102007022068A DE102007022068A1 (de) 2007-05-08 2007-05-08 Mantelrohr zum Einsatz in einem Abgassystem einer Verbrennungskraftmaschine, sowie Wabenkörper und Abgassystem umfassend mindestens ein Mantelrohr sowie ein Verfahren zur Herstellung eines Mantelrohres

Publications (1)

Publication Number Publication Date
WO2008135354A1 true WO2008135354A1 (fr) 2008-11-13

Family

ID=39672966

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2008/054557 WO2008135354A1 (fr) 2007-05-08 2008-04-15 Tube-enveloppe destiné à un système de gaz d'échappement d'un moteur à combustion interne, et corps en nid d'abeilles et système de gaz d'échappement comprenant au moins un tube-enveloppe, et procédé de production d'un tube-enveloppe

Country Status (3)

Country Link
DE (1) DE102007022068A1 (fr)
TW (1) TW200912124A (fr)
WO (1) WO2008135354A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010034667A1 (fr) * 2008-09-24 2010-04-01 Emitec Gesellschaft Für Emissionstechnologie Mbh Dispositif d'épuration des gaz d'échappement
US11330676B2 (en) 2016-03-02 2022-05-10 Watlow Electric Manufacturing Company Bare heating elements for heating fluid flows

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5555023B2 (ja) * 2010-03-19 2014-07-23 日野自動車株式会社 排気浄化装置
LT3118429T (lt) * 2015-07-16 2019-01-25 Akrapovic D.D. Automobilio vidaus degimo variklio išmetimo sistema

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3155117A (en) * 1959-11-27 1964-11-03 Escher Wyss Ag Double-walled hollow body for the reception of a hot gaseous medium under pressure
EP0662564A1 (fr) * 1994-01-07 1995-07-12 Firma J. Eberspächer Conduit de gaz d'échappement isolé par une couche d'air et méthode de construction
US6193876B1 (en) * 1996-07-22 2001-02-27 European Atomic Energy Community (Euratom) Hydrogenation method and reactor

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU5093573A (en) * 1972-01-11 1974-07-11 Imperial Chemical Industries Limited Catalyst support
DE3433938A1 (de) * 1984-09-15 1985-10-24 Bayerische Motoren Werke AG, 8000 München Abgaskonverter fuer brennkraftmaschinen
DE8812762U1 (de) * 1988-10-11 1989-06-29 Emitec Gesellschaft für Emissionstechnologie mbH, 5204 Lohmar Katalysator mit Doppelmantelsystem
DE4241469A1 (de) * 1992-12-09 1994-06-16 Emitec Emissionstechnologie Katalytischer Konverter mit zwei oder mehr Wabenkörpern in einem Mantelrohr und Verfahren zu seiner Herstellung

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3155117A (en) * 1959-11-27 1964-11-03 Escher Wyss Ag Double-walled hollow body for the reception of a hot gaseous medium under pressure
EP0662564A1 (fr) * 1994-01-07 1995-07-12 Firma J. Eberspächer Conduit de gaz d'échappement isolé par une couche d'air et méthode de construction
US6193876B1 (en) * 1996-07-22 2001-02-27 European Atomic Energy Community (Euratom) Hydrogenation method and reactor

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2010034667A1 (fr) * 2008-09-24 2010-04-01 Emitec Gesellschaft Für Emissionstechnologie Mbh Dispositif d'épuration des gaz d'échappement
US11330676B2 (en) 2016-03-02 2022-05-10 Watlow Electric Manufacturing Company Bare heating elements for heating fluid flows

Also Published As

Publication number Publication date
TW200912124A (en) 2009-03-16
DE102007022068A1 (de) 2008-11-13

Similar Documents

Publication Publication Date Title
EP2101896B1 (fr) Procede de reduction catalytique selective d'oxydes d'azote dans les gaz d'echappement d'un moteur a combustion interne et systeme d'echappement
EP1890016B1 (fr) Procédé destiné à l'ajout d'au moins un additif à un flux de gaz d'échappement et dispositif destiné à la préparation d'un flux de gaz d'échappement d'un moteur à combustion interne
EP1760284B1 (fr) Procédé et dispositif pour fournir des réactifs à un gaz d'échappement d'un moteur à combustion interne
EP2106285B1 (fr) Procédé de réduction catalytique sélective d'oxydes d'azote dans les gaz d'échappement de véhicules à moteur
DE102008018461B4 (de) Mischvorrichtung für eine Abgasnachbehandlungsanlage
EP2535535B1 (fr) Mélangeur statique
EP1882832A2 (fr) Dispositif destiné à réduire les oxydes d'azote dans des gaz d'échappement
WO2006128710A1 (fr) Procede et dispositif pour fournir de l'ammoniac dans un flux de gaz d'echappement d'un moteur a combustion interne
EP1931864A1 (fr) Procede et dispositif de reduction de la fraction d'oxyde d'azote dans les gaz d'echappement d'un moteur a combustion interne
WO2008135354A1 (fr) Tube-enveloppe destiné à un système de gaz d'échappement d'un moteur à combustion interne, et corps en nid d'abeilles et système de gaz d'échappement comprenant au moins un tube-enveloppe, et procédé de production d'un tube-enveloppe
EP2271417B1 (fr) Filtre à particules à revêtement hydrolysant
DE102009018422A1 (de) Verfahren zur Herstellung eines beschichteten Wabenkörpers
DE102005012066A1 (de) Wabenkörper mit Mitteln zur Reaktandenzufuhr und entsprechendes Verfahren und Abgassystem
WO2008089956A2 (fr) Dispositif de réduction sélective de nox dans des gaz d'échappement
EP2785891B1 (fr) Couche barrière anti-diffusion pour unité de traitement de gaz d'échappement
WO2016037981A1 (fr) Filtre à particules et procédé de production d'un filtre à particules
EP2576129A1 (fr) Composant résistant à haute température en acier inoxydable, doté d'un revêtement contenant du cobalt, unité de traitement de gaz d'échappement et procédé de fabrication d'une unité de traitement de gaz d'échappement de ce type
EP2577011B1 (fr) Ensemble soupape destiné au dosage d'un agent fluide dans une ligne d'échappement d'un moteur à combustion interne
DE102015008718A1 (de) Abgasnachbehandlungseinrichtung zur Nachbehandlung von Abgas einer Brennkraftmaschine
EP1048828A1 (fr) Convertisseur catalytique
EP3461929A1 (fr) Procédé de fabrication d'une installation de gaz d'échappement et installation de gaz d'échappement
DE102008026724A1 (de) Verschluss für ein Rohr oder eine Platine
DE102019200528B4 (de) Verfahren zur Verhinderung einer Bildung von harnstoffbasierten Ablagerungen und Abgasstrang mit einer Beschichtung
WO2003033886A1 (fr) Procede de production d'un module catalyseur, module catalyseur et systeme catalyseur
WO1996016723A1 (fr) Procede et catalyseur de decomposition d'oxydes d'azote

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 08749567

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 08749567

Country of ref document: EP

Kind code of ref document: A1