DE19859003A1 - Exhaust gas purification to reduce nitrogen oxides from oxygen-containing exhaust gases from an internal combustion engine - Google Patents
Exhaust gas purification to reduce nitrogen oxides from oxygen-containing exhaust gases from an internal combustion engineInfo
- Publication number
- DE19859003A1 DE19859003A1 DE1998159003 DE19859003A DE19859003A1 DE 19859003 A1 DE19859003 A1 DE 19859003A1 DE 1998159003 DE1998159003 DE 1998159003 DE 19859003 A DE19859003 A DE 19859003A DE 19859003 A1 DE19859003 A1 DE 19859003A1
- Authority
- DE
- Germany
- Prior art keywords
- catalyst
- reducing agent
- exhaust gas
- nitrogen oxides
- agent supply
- 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.)
- Withdrawn
Links
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 title claims abstract description 39
- 239000007789 gas Substances 0.000 title claims abstract description 30
- 238000002485 combustion reaction Methods 0.000 title claims abstract description 12
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 title claims abstract description 5
- 239000001301 oxygen Substances 0.000 title claims abstract description 5
- 229910052760 oxygen Inorganic materials 0.000 title claims abstract description 5
- 238000000746 purification Methods 0.000 title claims description 7
- 239000003054 catalyst Substances 0.000 claims abstract description 54
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 34
- 230000003197 catalytic effect Effects 0.000 claims abstract description 16
- 238000004140 cleaning Methods 0.000 claims description 9
- 238000011144 upstream manufacturing Methods 0.000 claims description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims 2
- 229910052757 nitrogen Inorganic materials 0.000 claims 1
- 238000006243 chemical reaction Methods 0.000 abstract description 6
- 230000001427 coherent effect Effects 0.000 abstract description 4
- 239000000446 fuel Substances 0.000 description 3
- 238000010276 construction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
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
- F01N3/10—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 ; Methods of operation or control of catalytic converters
- F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
-
- 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
- B01D53/9431—Processes characterised by a specific device
-
- 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 ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 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 ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
- F01N13/0093—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series the purifying devices are of the same type
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Health & Medical Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Analytical Chemistry (AREA)
- Toxicology (AREA)
- Environmental & Geological Engineering (AREA)
- Biomedical Technology (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
Description
Die Erfindung betrifft eine Abgasreinigungsanlage zur Reduktion von Stickoxiden in sauerstoffhaltigen Abgasen einer Brennkraftmaschine mit den Merkmalen des Oberbegriffes des Anspruches 1.The invention relates to an exhaust gas purification system for reduction of nitrogen oxides in oxygen-containing exhaust gases Internal combustion engine with the features of the preamble of Claim 1.
Aus der DE 44 40 833 A1 ist eine derartige Abgasreinigungsanlage bekannt. Dort sind in einem Abgasstrang der Brennkraftmaschine ein erster Katalysator brennraumnah und ein zweiter Katalysator brennraumfern angeordnet. Jedem Katalysator ist eine Dosiereinrichtung für ein dem Abgas zuführbares Reduktionsmittel zugeordnet. Mit Hilfe des Reduktionsmittels werden in den Katalysatoren die Stickoxide (NOx), die bei magerem Motorbetrieb in den sauerstoffhaltigen Abgasen auftreten, umgesetzt bzw. reduziert. Die dabei verwendeten Katalysatoren werden dementsprechend im allgemeinen als "Denox-Katalysator" bezeichnet. Da bei der bekannten Abgasreinigungseinrichtung im brennraumnahen und im brennraumfernen Katalysator unterschiedliche Abgaseintrittstemperaturen herrschen, weisen die beiden Katalysatoren einen unterschiedlichen, jeweils an die unterschiedlichen Abgaseintrittstemperaturen angepaßten Aufbau auf. Darüber hinaus arbeiten die dem jeweiligen Katalysator zugeordneten Dosiereinrichtungen unabhängig voneinander und verbessern dadurch die insgesamt erzielbare Stickoxid = Umsetzung in den Katalysatoren. Bei dieser Abgasreinigungsanlage ist nachteilig, daß für die Anordnung verschiedener Katalysatoren an voneinander entfernten Bereichen des Abgasstranges ein hoher Aufwand betrieben werden muß.Such an exhaust gas cleaning system is known from DE 44 40 833 A1. There, a first catalytic converter is arranged near the combustion chamber and a second catalytic converter away from the combustion chamber in an exhaust line of the internal combustion engine. A metering device for a reducing agent that can be supplied to the exhaust gas is assigned to each catalyst. With the help of the reducing agent, the nitrogen oxides (NO x ) that occur in the oxygen-containing exhaust gases during lean engine operation are converted or reduced in the catalysts. The catalysts used are accordingly generally referred to as "Denox catalysts". Since different exhaust gas inlet temperatures prevail in the known exhaust gas cleaning device in the catalyst near the combustion chamber and in the catalyst away from the combustion chamber, the two catalysts have a different structure, each adapted to the different exhaust gas inlet temperatures. In addition, the metering devices assigned to the respective catalyst work independently of one another and thereby improve the overall achievable nitrogen oxide = conversion in the catalysts. A disadvantage of this exhaust gas purification system is that a great deal of effort has to be expended for the arrangement of different catalytic converters on regions of the exhaust line that are at a distance from one another.
Die erfindungsgemäße Abgasreinigungsanlage mit den Merkmalen des Anspruches 1 hat demgegenüber den Vorteil, daß der aus mehreren Katalysator-Elementen zusammengesetzte Denox-Katalysator und die zugehörigen Reduktionsmittelzuführungen in einem zusammenhängenden Abschnitt des Abgasstranges untergebracht sind, wodurch sich eine vereinfachte Montage ergibt. Darüber hinaus ergibt sich durch die Verwendung der erfindungsgemäßen Abgasreinigungsanlage ein sehr hoher Umsetzungswirkungsgrad für die Reduktion der in den Abgasen enthaltenen Stickoxide. Während bei herkömmlichen einzelnen Denox-Katalysatoren ein NOx- Umsetzungsgrad von weniger als 50% erzielt wird, können mit der erfindungsgemäßen Reinigungsanlage Umsetzungsgrade von mehr als 75% erreicht werden. Die Reinigungswirkung für stickoxidhaltige Abgase wird somit beträchtlich gesteigert.The exhaust gas purification system according to the invention with the features of claim 1 has the advantage that the Denox catalyst composed of several catalyst elements and the associated reducing agent feeds are accommodated in a coherent section of the exhaust line, which results in simplified assembly. In addition, the use of the exhaust gas purification system according to the invention results in a very high conversion efficiency for the reduction of the nitrogen oxides contained in the exhaust gases. While an NO x conversion degree of less than 50% is achieved with conventional individual Denox catalysts, conversion degrees of more than 75% can be achieved with the cleaning system according to the invention. The cleaning effect for exhaust gases containing nitrogen oxide is thus considerably increased.
Entsprechend einer bevorzugten Ausführungsform können die Katalysator-Elemente und die jeweils zugeordneten Reduktionsmittelzuführungen integral in einem gemeinsamen Katalysator-Körper ausgebildet sein. Der erfindungsgemäße Denox- Katalysator kann dadurch wie ein herkömmlicher Katalysator montiert werden. Die Zuführung von Reduktionsmittel erfolgt hierbei vorzugsweise gestuft entlang des Durchströmungsweges des Katalysator-Körpers. Bei einer anderen Ausführungsform kann auch vorgesehen sein, das Reduktionsmittel entlang des Katalysator- Körpers kontinuierlich bzw. stufenlos zuzuführen, so daß sich im Inneren des Katalysator-Körpers sehr viele, in Strömungsrichtung aufeinanderfolgende Katalysator-Abschnitte bzw. Katalysator- Elemente ausbilden.According to a preferred embodiment, the Catalyst elements and the respectively assigned Reductant feeds integral in a common Be catalytic converter body. The denox according to the invention This enables catalyst to function like a conventional catalyst to be assembled. The supply of reducing agent takes place here preferably stepped along the flow path of the Catalyst body. In another embodiment, too be provided, the reducing agent along the catalyst Body continuously or continuously feed so that in Many inside the catalytic converter body, in the direction of flow successive catalyst sections or catalyst Train elements.
Gemäß einer anderen Ausführungsform können die einzelnen Katalysator-Elemente jeweils als separater Katalysator-Körper ausgebildet sein, die im Abgasstrangabschnitt in Reihe angeordnet sind, wobei stromauf jedes Katalysator-Körpers die dem jeweiligen Katalysator-Element zugeordnete Reduktionsmittelzuführung in den Abgasstrang einmündet. Hier wird der Denox-Katalysator aus einer Gruppe einzelner Katalysator-Körper aufgebaut, die einfach zu einer Baugruppe zusammengefaßt sein können, z. B. im Rahmen einer Vormontage. Eine solche Baugruppe ist wiederum einfach handhabbar und montierbar.According to another embodiment, the individual Catalyst elements each as a separate catalyst body be formed in series in the exhaust line section are arranged, the upstream of each catalyst body assigned to the respective catalyst element Reducing agent feed opens into the exhaust system. Here is the Denox catalyst from a group of individual Catalytic converter body built that easily into an assembly can be summarized, for. B. as part of a pre-assembly. Such an assembly is in turn easy to handle and mountable.
Um eine Emission der zugeführten Reduktionsmittel zu vermeiden, wird das stromab letzte Katalysator-Element so dimensioiert, daß die darin eintretenden Reduktionsmittel im wesentlichen vollständig oxidiert werden. Die in das stromab letzte Katalysator-Element eintretenden Reduktionsmittel setzen sich zusammen aus dem für dieses Katalysator-Element von der Reduktionsmittelzuführung zugeführten Reduktionsmittel sowie aus den noch nicht oxidierten Restmengen derjenigen Reduktionsmittel, die den stromauf des letzten Katalysator- Elementes angeordneten Katalysator-Elementen zugeführt worden sind.In order to avoid emission of the supplied reducing agents, the last downstream catalyst element is dimensioned so that the reducing agents entering therein essentially be completely oxidized. The one in the downstream last Reducing agents entering the catalyst element settle together from the for this catalyst element from the Reducing agent supply and reducing agent supplied the not yet oxidized residual amounts of those Reducing agents which are the upstream of the last catalyst Element arranged catalyst elements have been supplied are.
Weitere Vorteile und vorteilhafte Ausgestaltungen des Gegenstandes der Erfindung sind in der Beschreibung, der Zeichnung und den Ansprüchen entnehmbar.Further advantages and advantageous configurations of the The invention relates to the description of the Drawing and the claims can be removed.
Ausführungsbeispiele der erfindungsgemäßen Abgasreinigungsanlage sind in den Zeichnungen dargestellt und werden im folgenden näher erläutert. Embodiments of the exhaust gas purification system according to the invention are shown in the drawings and are described below explained in more detail.
Fig. 1 zeigt eine schematisierte, schaltplanartige Prinzipdarstellung einer erfindungsgemäßen Abgasreinigungsanlage in einer ersten Ausführungsform und Fig. 2 zeigt eine Darstellung wie Fig. 1, jedoch einer anderen Ausführungsform. FIG. 1 shows a schematic, circuit-diagram-like basic illustration of an exhaust gas cleaning system according to the invention in a first embodiment and FIG. 2 shows an illustration like FIG. 1, but with another embodiment.
Entsprechend den Fig. 1 und 2 ist in einem Abgasstrang 1 einer Brennkraftmaschine 2, insbesondere eines Dieselmotors, ein Denox-Katalysator 3 angeordnet. Um den Kraftstoffverbrauch der Brennkraftmaschine 2 möglichst gering zu halten wird die Brennkraftmaschine 2 mager betrieben, wodurch sich in den Abgasen ein hoher Anteil von Stickoxiden NOx ergibt. Zur Reduktion dieser Stickoxide wird den Abgasen von einer Reduktionsmittelzuführungseinrichtung 4 ein Reduktionsmittel, z. B. Kraftstoff, zugegeben. Im Denox-Katalysator 3 erfolgt dann die Reduktion der Stickoxide bzw. die Oxidation des Reduktionsmittels, wobei die Stickoxide in harmlosere Abgase umgesetzt werden.According to FIGS. 1 and 2 is disposed in an exhaust system 1 of an internal combustion engine 2, in particular a diesel engine, a DeNOx catalytic converter 3. In order to keep the fuel consumption of the internal combustion engine 2 as low as possible, the internal combustion engine 2 is operated lean, which results in a high proportion of nitrogen oxides NO x in the exhaust gases. To reduce these nitrogen oxides, the exhaust gases from a reducing agent supply device 4 is a reducing agent, for. B. fuel added. The reduction of the nitrogen oxides or the oxidation of the reducing agent then takes place in the Denox catalytic converter 3 , the nitrogen oxides being converted into more harmless exhaust gases.
Entsprechend Fig. 1 ist der Denox-Katalysator 3 aus mehreren Katalysator-Elementen 5 aufgebaut, die integral in einem gemeinsamen Katalysator-Körper 6 ausgebildet sind. Stromauf jedes einzelnen Katalysator-Elementes 5 wird Reduktionsmittel in den Abgasstrang 1 eingeleitet. Bei der Ausführungsform gemäß Fig. 1 verzweigt sich dabei eine Reduktionsmittelleitung 7 dementsprechend. Der erfindungsgemäße Denox-Katalysator 3 bildet somit ein in herkömmlicher Weise montierbares Bauteil.According to Fig. 1, the DeNOx catalyst 3 from a plurality of catalyst elements 5 constituted, which are integrally formed in a common catalyst body 6. Reductant is introduced into the exhaust line 1 upstream of each individual catalytic converter element 5 . In the embodiment according to FIG. 1, a reducing agent line 7 branches accordingly. The Denox catalytic converter 3 according to the invention thus forms a component which can be assembled in a conventional manner.
Entsprechend Fig. 2 können die einzelnen Katalysator-Elemente 5 jeweils als separate Katalysator-Körper 6 ausgebildet sein, die im Abgasstrang 1 in einem zusammenhängenden Abschnitt des Abgasstranges 1 in Reihe angeordnet sind. Auch hier ist jedem der Katalysator-Körper 6 eine jeweils stromauf angeordnete Reduktionsmittelzuführung zugeordnet. Bei dem in Fig. 2 dargestellten Ausführungsbeispiel ist zu diesem Zweck für jedes Katalysator-Element 5 eine separate Reduktionsmittelleitung 7 ausgebildet. Da die einzelnen Katalysator-Körper 6 in einem zusammenhängenden Abschnitt des Abgasstranges 1 angeordnet sind, können diese auch einfach zu einer Baugruppe zusammengefaßt werden, die als solche komplett vormontierbar ist und im Rahmen der Endmontage in einem Arbeitsgang im Abgasstrang 1 eingebaut werden kann.According to FIG. 2, the individual catalytic converter elements 5 can each be designed as separate catalytic converter bodies 6 , which are arranged in series in the exhaust gas line 1 in a coherent section of the exhaust gas line 1 . Here, too, each of the catalyst bodies 6 is assigned a reducing agent supply arranged upstream. In the exemplary embodiment shown in FIG. 2, a separate reducing agent line 7 is formed for each catalyst element 5 . Since the individual catalytic converter bodies 6 are arranged in a coherent section of the exhaust line 1 , they can also simply be combined to form an assembly which as such can be completely preassembled and can be installed in the exhaust line 1 as part of the final assembly.
Vorzugsweise sind die einzelnen Katalysator-Elemente 5 baugleich ausgeführt, so daß auch hier kein besonderer Herstellungsaufwand erforderlich ist.The individual catalyst elements 5 are preferably of identical construction, so that no special manufacturing outlay is required here either.
Im Vergleich zu einem herkömmlichen Denox-Katalysator, bei dem stromauf an einer Stelle Reduktionsmittel in die Abgase eingeleitet wird, kann beim erfindungsgemäßen Denox-Katalysator 3 die erzielbare NOx-Umsetzungsrate deutlich erhöht werden. Da die einzelnen Reduktionsmittelmengen, die den Abgasen stromauf der jeweiligen Katalysator-Elemente 5 zugeführt werden, auf die jeweiligen Katalysator-Elemente 5 abgestimmt sind, kann die vorgenannte Erhöhung des NOx-Umsetzungsgrades auch ohne eine Erhöhung der benötigten Reduktionsmittelmenge erfolgen, so daß Reduktionsmittel und demnach vorzugsweise Kraftstoff eingespart werden kann.In comparison with a conventional Denox catalyst, in which reducing agent is introduced into the exhaust gases at one point upstream, the achievable NO x conversion rate can be significantly increased in the Denox catalyst 3 according to the invention. Since the individual quantities of reducing agent to be supplied to the exhaust gases upstream of the respective catalyst elements 5 are matched to the respective catalyst elements 5, the aforementioned increase in the NO x -Umsetzungsgrades can also take place without an increase in the required amount of reducing agent, so that the reducing agent and accordingly preferably fuel can be saved.
Claims (5)
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1998159003 DE19859003A1 (en) | 1998-12-21 | 1998-12-21 | Exhaust gas purification to reduce nitrogen oxides from oxygen-containing exhaust gases from an internal combustion engine |
| PCT/DE1999/003529 WO2000037780A1 (en) | 1998-12-21 | 1999-11-05 | Exhaust gas purifier for reducing nitrogen oxides in oxygen-containing exhaust gas of an internal combustion engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE1998159003 DE19859003A1 (en) | 1998-12-21 | 1998-12-21 | Exhaust gas purification to reduce nitrogen oxides from oxygen-containing exhaust gases from an internal combustion engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE19859003A1 true DE19859003A1 (en) | 2000-06-29 |
Family
ID=7891945
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE1998159003 Withdrawn DE19859003A1 (en) | 1998-12-21 | 1998-12-21 | Exhaust gas purification to reduce nitrogen oxides from oxygen-containing exhaust gases from an internal combustion engine |
Country Status (2)
| Country | Link |
|---|---|
| DE (1) | DE19859003A1 (en) |
| WO (1) | WO2000037780A1 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10126456A1 (en) * | 2001-05-31 | 2002-12-19 | Daimler Chrysler Ag | Device and method for removing nitrogen oxides from the exhaust gas of lean-burn internal combustion engines |
| EP1286027A1 (en) * | 2001-08-14 | 2003-02-26 | Siemens Aktiengesellschaft | Catalyst system, its use and method of its operation |
| EP3368194B1 (en) | 2015-10-28 | 2019-08-14 | Casale SA | A method and apparatus for removing nox and n2o from a gas |
| EP3532189B1 (en) | 2016-10-28 | 2024-05-15 | Casale SA | A method for removing nitrogen oxides from a gas using an iron exchanged zeolite catalyst |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009540212A (en) * | 2006-06-13 | 2009-11-19 | ボルボ ラストバグナー アーベー | Diesel catalyst system |
| SE530028C2 (en) | 2006-06-28 | 2008-02-12 | Scania Cv Abp | Method and apparatus for the treatment of exhaust gases and vehicles |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2825137B2 (en) * | 1990-06-25 | 1998-11-18 | トヨタ自動車株式会社 | Exhaust gas purification device for internal combustion engine |
| DE4338883B4 (en) * | 1992-11-24 | 2005-03-03 | Volkswagen Ag | Catalyst arrangement for reducing nitrogen oxides contained in oxygen-containing exhaust gases |
| DE4310961C1 (en) * | 1993-04-03 | 1994-03-10 | Mtu Friedrichshafen Gmbh | Selective catalytic nitrogen oxide(s) redn. in exhaust gas - by stepwise reductant supply to catalyst sections on attaining minimum temp. after engine starting |
-
1998
- 1998-12-21 DE DE1998159003 patent/DE19859003A1/en not_active Withdrawn
-
1999
- 1999-11-05 WO PCT/DE1999/003529 patent/WO2000037780A1/en active Application Filing
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10126456A1 (en) * | 2001-05-31 | 2002-12-19 | Daimler Chrysler Ag | Device and method for removing nitrogen oxides from the exhaust gas of lean-burn internal combustion engines |
| DE10126456B4 (en) * | 2001-05-31 | 2004-05-19 | Daimlerchrysler Ag | Apparatus and method for removing nitrogen oxides from the exhaust lean burned internal combustion engines |
| EP1286027A1 (en) * | 2001-08-14 | 2003-02-26 | Siemens Aktiengesellschaft | Catalyst system, its use and method of its operation |
| WO2003016688A1 (en) * | 2001-08-14 | 2003-02-27 | Siemens Aktiengesellschaft | Catalyst system, use thereof and method for operating the same |
| EP3368194B1 (en) | 2015-10-28 | 2019-08-14 | Casale SA | A method and apparatus for removing nox and n2o from a gas |
| US11325069B2 (en) | 2015-10-28 | 2022-05-10 | Casale Sa | Method and apparatus for removing NOx and N2O from a gas |
| EP3532189B1 (en) | 2016-10-28 | 2024-05-15 | Casale SA | A method for removing nitrogen oxides from a gas using an iron exchanged zeolite catalyst |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2000037780A1 (en) | 2000-06-29 |
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