WO2000066252A1 - Verfahren und vorrichtung zum einbringen eines gasförmigen redukt ionsmittels eines stickoxids in ein gasgemisch - Google Patents
Verfahren und vorrichtung zum einbringen eines gasförmigen redukt ionsmittels eines stickoxids in ein gasgemisch Download PDFInfo
- Publication number
- WO2000066252A1 WO2000066252A1 PCT/DE2000/001018 DE0001018W WO0066252A1 WO 2000066252 A1 WO2000066252 A1 WO 2000066252A1 DE 0001018 W DE0001018 W DE 0001018W WO 0066252 A1 WO0066252 A1 WO 0066252A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- reducing agent
- starting material
- gas mixture
- tempering
- thermal energy
- Prior art date
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
- F01N3/10—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
- F01N3/2066—Selective catalytic reduction [SCR]
-
- 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
-
- 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
-
- 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
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
- B01D53/565—Nitrogen oxides by treating the gases with solids
-
- 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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8621—Removing nitrogen compounds
- B01D53/8625—Nitrogen oxides
- B01D53/8631—Processes characterised by a specific device
-
- 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
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/90—Injecting reactants
-
- 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
-
- 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
- B01D53/9495—Controlling the catalytic process
-
- 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/06—Adding substances to exhaust gases the substance being in the gaseous form
-
- 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
- F01N2610/10—Adding substances to exhaust gases the substance being heated, e.g. by heating tank or supply line of the added substance
-
- 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
- F01N5/00—Exhaust or silencing apparatus combined or associated with devices profiting from exhaust energy
- F01N5/02—Exhaust or silencing apparatus combined or associated with devices profiting from exhaust energy the devices using heat
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Definitions
- the invention relates to a method for introducing at least one gaseous reducing agent of a nitrogen oxide into a gas mixture, thermal energy being supplied to at least one solid starting material of the reducing agent to form the reducing agent and the reducing agent and the gas mixture being brought into contact with one another.
- a method for introducing at least one gaseous reducing agent of a nitrogen oxide into a gas mixture thermal energy being supplied to at least one solid starting material of the reducing agent to form the reducing agent and the reducing agent and the gas mixture being brought into contact with one another.
- a device for carrying out the method is specified.
- nitrogen oxide is an undesirable by-product.
- the nitrogen oxides are subsequently removed, for example, by adding a reducing agent for the nitrogen oxides to the exhaust gas.
- cyanic acid is introduced into the exhaust gas as a reducing agent.
- the cyanic acid reacts with nitrogen oxide to form molecular nitrogen and carbon dioxide.
- the reducing agent cyanic acid
- the cyanuric acid is provided in a heatable container.
- the object of the invention is to provide a method for introducing a gaseous reducing agent of nitrogen oxides into a gas mixture, in which the amount of reducing agent to be introduced into the gas mixture can be set in a simple manner.
- a method for introducing at least one gaseous reducing agent of a nitrogen oxide into a gas mixture is specified, thermal energy being supplied to at least one solid starting material of the reducing agent to form the reducing agent and the reducing agent and the gas mixture being brought into contact with one another, characterized in that that the thermal energy is supplied to at least one body from the starting material.
- the gas mixture is, for example, the exhaust gas from an internal combustion engine, in particular a diesel or gasoline engine.
- the gas mixture can also be the exhaust gas from a fossil-fired power plant.
- the gaseous reducing agent is, for example, ammonia.
- Ammonia has the advantage that (in the presence of a catalyst) it reacts with nitrogen oxides to form molecular nitrogen. Only carbon dioxide is produced as a by-product.
- a starting material for the reducing agent is, for example, urea.
- Urea releases ammonia at a temperature above the melting point of the urea.
- Hydrolysis of the urea (decomposition in the presence of water that is automatically present in the exhaust gas of an internal combustion engine) only releases carbon dioxide as a by-product.
- urea can be regarded as the ideal starting material for ammonia.
- urea is hygroscopic and can therefore only be stored to a limited extent.
- a hygroscopic property of a material can be lowered by lowering a reactive surface of the material for the absorption of water. Therefore, the raw material is provided in the form of a body. In particular, a body with a compressed starting material is used.
- the body consists for example of a pressed powder of the starting material. Remelted starting material is also conceivable.
- the starting material can also be embedded in a solid matrix.
- the material of the matrix is preferably water-repellent.
- the material should be easy to convert into environmentally friendly reaction products.
- the thermal energy is provided by a means for tempering the body.
- the thermal energy is supplied to a surface of the body.
- the thermal energy is supplied to the body by heat conduction with the aid of a temperature-regulating holding device.
- the thermal energy can also be supplied, for example, by convection or thermal radiation.
- the thermal energy is provided by the gas mixture.
- a surface of the body on which the reducing agent is formed and the gas mixture are brought into contact with one another.
- the exhaust gas from the internal combustion engine flows in an exhaust pipe.
- the flowing gas mixture, heated by the combustion, is directed past the body.
- a temperature of the gas mixture is, for example, between 350 ° and 600 ° C. These temperatures are sufficient to release ammonia from urea.
- the thermal energy is provided by convection through the gas mixture.
- the means for tempering acts as a catalyst for the formation of the reducing agent.
- the means for tempering is a holding device for the body with the starting material.
- the mounting device functions, for example, as a hydrolysis catalyst for urea.
- ammonia is formed in the process as a reducing agent.
- Aliphatic ammonia derivatives (amines) are also conceivable.
- Urea is used in particular as the starting material for the reducing agent.
- Other starting materials such as ammonium carbonate, ammonium carbamate, ammonium hydrogen carbonate, ammonium formate, ammonium oxalate, ammonium hydroxide, cyanuric acid, urea formaldehyde, melamine and mixtures of these compounds.
- a body is used in the method, which consists of a compressed starting material.
- a compressed starting material is, for example, a pressed powder of the starting material or the starting material in remelted form, the body being formed by solidification of a melt in a mold or on a device for heat dissipation.
- a body shows a lower hygroscopic property than powdery, loose starting material.
- the body can be stored well.
- a nitrogen oxide content in the gas mixture is measured in the method and a quantity of the thermal energy is added in accordance with the content. This ensures that as much nitrogen oxide as possible is broken down. At the same time, it is ensured that not too much reducing agent is released that could pollute the environment.
- the nitrogen oxide content is determined, for example, with a gas sensor.
- the amount of thermal energy is determined, for example, by a heating power of the tempering agent.
- the body is heated by the exhaust gas of the internal combustion engine in such a way that too much reducing agent is released.
- the cooling is carried out, for example, by a Peltier element connected to the means for tempering or by an increased air supply. It is thus possible to optimally reduce the nitrogen oxide content in every phase of the operation of an internal combustion engine.
- the introduction of gaseous reducing agents into the gas mixture can also be influenced by an additional gas flow, for example by compressed air.
- the described method is carried out in particular for introducing the reducing agent into the exhaust gas of an internal combustion engine.
- an internal combustion engine is in particular a diesel or gasoline engine.
- this process can also be used to reduce nitrogen oxides in the exhaust gas of a power plant.
- the procedure is also not limited to combustion engines that are powered by fossil fuels.
- nitrogen oxide can also be produced. Nitrogen oxides of the corresponding exhaust gas are removed in the manner described.
- a device for carrying out a method for introducing at least one gaseous reducing agent of a nitrogen oxide into a gas mixture is specified, thermal energy being supplied to at least one solid starting material of the reducing agent to form the reducing agent, and the reducing agent and the gas mixture together be brought into contact.
- the device which is particularly suitable for carrying out the method described above, is characterized in that a body made of the starting material and a means for tempering the body are arranged together.
- the means for tempering is, for example, a temperature-controlled holding device for the body.
- the holding device has in particular a resistance heater.
- the means for tempering has at least one opening for the reducing agent.
- the reducing agent enters the gas mixture through this opening.
- the agent is, for example, a metal plate with several holes.
- the means for tempering has at least one spiral.
- the spiral can consist of a metal band or a wire.
- the spiral can also be shaped into a spiral screw.
- the means for tempering has at least one grid or a sieve.
- the grid is, for example, a wire mesh.
- the wire mesh has a metal, for example.
- the means for tempering is inert towards the starting material and / or the reducing agent.
- the body with the starting material is, for example, in a container.
- the container is attached directly or indirectly to a location of the exhaust pipe, one wall of the exhaust pipe having at least one opening at this location.
- the reducing agent enters the exhaust gas through this opening.
- the exhaust pipe can itself be the means for tempering the body.
- the means for tempering can also be arranged in the opening of the wall of the exhaust pipe.
- the container is particularly equipped so that the body with the starting material is shielded from ambient air. Water from the ambient air is not absorbed by any hygroscopic starting material.
- the container can be equipped with a desiccant such as silica gel.
- the body itself can also have a desiccant. It is also conceivable that the body has a water-repellent layer on one surface.
- the device has, for example, a pretensioning device for the body.
- This pretensioning device ensures that a certain arrangement of the body on the means for tempering is guaranteed.
- the biasing device is a spring that presses the body against a heatable holding device for the body.
- the spring is integrated, for example, in a lid of the container that contains the body. In this way, the body and the means for tempering are in constant contact with each other. This is also achieved by using gravity, which presses the body against the tempering agent.
- the device has at least one means for checking an existing amount of the starting material.
- This means is in particular a light barrier.
- the light barrier consists, for example, of a light-emitting photodiode and a photodetector that registers the light.
- a signal is generated which informs an operator, for example, a motorist of the amount of starting material available. Informing can be associated, for example, with a request to “refuel” the starting material. It is also conceivable that an ignition process is interrupted. With the aid of several means for checking an existing amount of starting material, a consumption of starting material can be exactly tracked.
- the device is designed in such a way that mixing of the gaseous reducing agent with the gas mixture is promoted.
- the holding device is placed in a gas stream of the gas mixture. This causes the reducing agent and gas mixture to swirl.
- the reducing agent can also be introduced via a nozzle or a wind scoop.
- the present invention for introducing a reducing agent of nitrogen oxides has the following advantages:
- a solid raw material of the reducing agent is provided. If an aqueous solution of the starting material were introduced, there would be the danger, for example, that a means for metering the starting material, for example a nozzle, would be blocked by crystallized starting material. O 00/66252
- the starting material is used in a less hygroscopic and therefore easy to handle form.
- the reducing agent can be dosed simply and precisely.
- Figure 1 shows a cross section of a device for introducing a gaseous reducing agent of nitrogen oxides into an exhaust gas of an internal combustion engine.
- FIG. 2 shows a method for introducing a gaseous reducing agent of nitrogen oxides into an exhaust gas.
- Figures 3a to 3c show different embodiments of the means for tempering the body.
- nitrogen oxides in the exhaust gas 1 of a diesel engine 19 are reduced.
- the exhaust gas 1 is passed through an exhaust pipe 2 with a flow direction 3 (see FIG. 1).
- the exhaust pipe 2 has an opening 4 in a wall.
- a container 5 is attached to the wall at the location of the exhaust pipe 2 which has the opening 4.
- the container 5 is a tube and has a lid 8 and a desiccant 18 made of silica gel.
- a cylindrical body 6 made of pressed urea is arranged in the container 5. In the opening 4 O 00/66252
- the means 7 for tempering is also a holding device for the body 6.
- the means 7 for tempering has an electrical resistance heater.
- the body 6 is clamped between the means 7 and a cover 8.
- the cover 8 has a spring which presses the body 6 against the means 7.
- the means 7 for tempering heats the body 6.
- the body 6 is heated by the exhaust gas 1 flowing past.
- urea is converted to ammonia, which reaches the exhaust gas 1 through the holes 9 of the agent 7.
- the means 7 for tempering is a disk with holes 9 (FIG. 3a).
- the means 7 is a metal spiral (FIG. 3b) and a grid or sieve (FIG. 3c).
- the holes 9 present in these exemplary embodiments have a diameter of approximately 2 mm.
- the body 6 and the exhaust gas 1 are also in contact through these openings 9.
- the starting point is a start of the diesel engine.
- the means 7 is heated for tempering.
- a measurement 201 of nitrogen oxide in the exhaust gas 1 is started.
- a gas sensor 12 for nitrogen oxides which accelerates the exhaust gas after a catalytic converter 11 for the conversion of ammonia and nitrogen oxides to molecular nitrogen and carbon dioxide, a content of nitrogen oxides in the exhaust gas 1 is examined.
- the thermal energy that is supplied to the body is determined in accordance with the content (step 202). If the nitrogen oxide content is too high, the heating power of the agent 7 is increased. As a result, more thermal energy is supplied to the body with the urea. It will be more O 00/66252
- a further gas sensor 13 is present after the catalytic converter 11, which determines an ammonia content in the exhaust gas 1. If the specific ammonia content in the exhaust gas is too high, the thermal energy that is supplied to the body 6 is reduced.
- the various embodiments of the device 2 also have a means for controlling an amount of the starting material present.
- This means is a light barrier which has a light-emitting photodiode 14 and a photodetector 15 which detects the light.
- the body 6 is arranged between the photodiode 14 and photodetector 15 and is optically accessible for the light barrier. As soon as starting material is converted to the reducing agent, a height 16 of the body 6 decreases. If the height 16 falls below a dimension which is given by the arrangement of the light barrier and the means 7 for tempering, a signal is generated which indicates to the operator that a certain amount of the available starting material has fallen below.
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00931004A EP1194214B1 (de) | 1999-04-30 | 2000-04-03 | Verfahren und vorrichtung zum einbringen eines gasförmigen reduktionsmittels eines stickoxids in ein gasgemisch |
AT00931004T ATE270138T1 (de) | 1999-04-30 | 2000-04-03 | Verfahren und vorrichtung zum einbringen eines gasförmigen reduktionsmittels eines stickoxids in ein gasgemisch |
KR1020017013890A KR20020012190A (ko) | 1999-04-30 | 2000-04-03 | 기체 혼합물내로 산화질소의 기체상 환원제를 도입시키는방법 및 장치 |
DE50006971T DE50006971D1 (de) | 1999-04-30 | 2000-04-03 | Verfahren und vorrichtung zum einbringen eines gasförmigen reduktionsmittels eines stickoxids in ein gasgemisch |
US09/959,587 US6759021B1 (en) | 1999-04-30 | 2000-04-03 | Method and device for introducing a gaseous reducing agent of a nitrogen oxide into a gas mixture |
JP2000615129A JP2002543335A (ja) | 1999-04-30 | 2000-04-03 | 窒素酸化物の気体状還元剤をガス混合物中へ導入する方法および装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19919914 | 1999-04-30 | ||
DE19919914.0 | 1999-04-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000066252A1 true WO2000066252A1 (de) | 2000-11-09 |
Family
ID=7906552
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2000/001018 WO2000066252A1 (de) | 1999-04-30 | 2000-04-03 | Verfahren und vorrichtung zum einbringen eines gasförmigen redukt ionsmittels eines stickoxids in ein gasgemisch |
Country Status (9)
Country | Link |
---|---|
US (1) | US6759021B1 (de) |
EP (1) | EP1194214B1 (de) |
JP (1) | JP2002543335A (de) |
KR (1) | KR20020012190A (de) |
AT (1) | ATE270138T1 (de) |
DE (1) | DE50006971D1 (de) |
DK (1) | DK1194214T3 (de) |
ES (1) | ES2223520T3 (de) |
WO (1) | WO2000066252A1 (de) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002055180A1 (de) * | 2001-01-13 | 2002-07-18 | Fev Motorentechnik Gmbh | Verfahren zur umwandlung eines festen stickstoffhaltigen reduktionsmittels in eine gasphase für die reduktion von stickoxiden in abgasen |
EP1647324A3 (de) * | 2004-10-16 | 2007-04-04 | Robert Bosch Gmbh | Verbesserte Aufbereitung von Hilfsstoffen zur NOx-Minderung |
WO2009033911A1 (de) * | 2007-09-06 | 2009-03-19 | Robert Bosch Gmbh | Abgasnachbehandlungsanordnung mit reduktionsmittelspeicher und verfahren zur nachbehandlung von abgasen |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE10260156A1 (de) * | 2002-12-20 | 2004-07-01 | BSH Bosch und Siemens Hausgeräte GmbH | Wäschetrockner und Verwendung eines Ultraschallzerstäubers |
WO2005033479A1 (ja) * | 2003-09-30 | 2005-04-14 | Nissan Diesel Motor Co., Ltd. | エンジンの排気浄化装置 |
US7644577B2 (en) * | 2004-10-29 | 2010-01-12 | Philip Morris Usa, Inc. | Reducing agent metering system for reducing NOx in lean burn internal combustion engines |
US7581387B2 (en) * | 2005-02-28 | 2009-09-01 | Caterpillar Inc. | Exhaust gas mixing system |
DE102007021669B4 (de) | 2007-05-09 | 2009-11-19 | Audi Ag | Vorrichtung zur Abgasbehandlung von brennkraftmaschinenbetriebenen Fahrzeugen |
US7976712B2 (en) * | 2007-10-01 | 2011-07-12 | Cummins Filtration Ip, Inc. | Apparatus, system, and method for filtration of a dosing fluid in an exhaust aftertreatment system |
WO2014175868A1 (en) | 2013-04-23 | 2014-10-30 | International Engine Intellectual Property Company, Llc | Gaseous fluid metering unit |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4731231A (en) * | 1986-05-05 | 1988-03-15 | Robert A. Perry | NO reduction using sublimation of cyanuric acid |
DE4200514A1 (de) * | 1992-01-11 | 1993-07-15 | Asea Brown Boveri | Verfahren zur katalytischen entstickung von abgasen |
EP0615777A1 (de) * | 1993-03-17 | 1994-09-21 | MAN Nutzfahrzeuge Aktiengesellschaft | Verfahren und Vorrichtung zur selektiven katalytischen Reduktion von NOx in sauerstoffhaltigen Gasen |
EP0848985A1 (de) * | 1996-12-10 | 1998-06-24 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Minderung von Stickoxiden in Gasgemischen |
US5809775A (en) * | 1997-04-02 | 1998-09-22 | Clean Diesel Technologies, Inc. | Reducing NOx emissions from an engine by selective catalytic reduction utilizing solid reagents |
EP0878608A2 (de) * | 1997-05-13 | 1998-11-18 | Daimler-Benz Aktiengesellschaft | Verfahren und Vorrichtung zur Stickoxidreduktion im Abgas einer Verbrennungseinrichtung |
WO1999029432A1 (de) * | 1997-12-05 | 1999-06-17 | Palas Gmbh | Verfahren und vorrichtung zur erzeugung eines feststoffaerosols |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH02258017A (ja) * | 1989-03-31 | 1990-10-18 | Babcock Hitachi Kk | 固体還元剤を用いた排ガス脱硝装置 |
US6266955B1 (en) * | 1999-08-20 | 2001-07-31 | Caterpillar Inc. | Diagnostic system for an emissions control on an engine |
-
2000
- 2000-04-03 JP JP2000615129A patent/JP2002543335A/ja not_active Withdrawn
- 2000-04-03 KR KR1020017013890A patent/KR20020012190A/ko not_active Application Discontinuation
- 2000-04-03 ES ES00931004T patent/ES2223520T3/es not_active Expired - Lifetime
- 2000-04-03 EP EP00931004A patent/EP1194214B1/de not_active Expired - Lifetime
- 2000-04-03 AT AT00931004T patent/ATE270138T1/de not_active IP Right Cessation
- 2000-04-03 US US09/959,587 patent/US6759021B1/en not_active Expired - Fee Related
- 2000-04-03 DE DE50006971T patent/DE50006971D1/de not_active Expired - Fee Related
- 2000-04-03 WO PCT/DE2000/001018 patent/WO2000066252A1/de not_active Application Discontinuation
- 2000-04-03 DK DK00931004T patent/DK1194214T3/da active
Patent Citations (7)
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US4731231A (en) * | 1986-05-05 | 1988-03-15 | Robert A. Perry | NO reduction using sublimation of cyanuric acid |
DE4200514A1 (de) * | 1992-01-11 | 1993-07-15 | Asea Brown Boveri | Verfahren zur katalytischen entstickung von abgasen |
EP0615777A1 (de) * | 1993-03-17 | 1994-09-21 | MAN Nutzfahrzeuge Aktiengesellschaft | Verfahren und Vorrichtung zur selektiven katalytischen Reduktion von NOx in sauerstoffhaltigen Gasen |
EP0848985A1 (de) * | 1996-12-10 | 1998-06-24 | Robert Bosch Gmbh | Verfahren und Vorrichtung zur Minderung von Stickoxiden in Gasgemischen |
US5809775A (en) * | 1997-04-02 | 1998-09-22 | Clean Diesel Technologies, Inc. | Reducing NOx emissions from an engine by selective catalytic reduction utilizing solid reagents |
EP0878608A2 (de) * | 1997-05-13 | 1998-11-18 | Daimler-Benz Aktiengesellschaft | Verfahren und Vorrichtung zur Stickoxidreduktion im Abgas einer Verbrennungseinrichtung |
WO1999029432A1 (de) * | 1997-12-05 | 1999-06-17 | Palas Gmbh | Verfahren und vorrichtung zur erzeugung eines feststoffaerosols |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2002055180A1 (de) * | 2001-01-13 | 2002-07-18 | Fev Motorentechnik Gmbh | Verfahren zur umwandlung eines festen stickstoffhaltigen reduktionsmittels in eine gasphase für die reduktion von stickoxiden in abgasen |
US6837041B2 (en) | 2001-01-13 | 2005-01-04 | Fev Motorentechnik Gmbh | Method of converting a solid nitrogen-containing reducing agent to the gas phase for use in the reduction of nitrogen oxides in exhaust gases |
EP1647324A3 (de) * | 2004-10-16 | 2007-04-04 | Robert Bosch Gmbh | Verbesserte Aufbereitung von Hilfsstoffen zur NOx-Minderung |
WO2009033911A1 (de) * | 2007-09-06 | 2009-03-19 | Robert Bosch Gmbh | Abgasnachbehandlungsanordnung mit reduktionsmittelspeicher und verfahren zur nachbehandlung von abgasen |
Also Published As
Publication number | Publication date |
---|---|
DK1194214T3 (da) | 2004-09-20 |
JP2002543335A (ja) | 2002-12-17 |
ATE270138T1 (de) | 2004-07-15 |
US6759021B1 (en) | 2004-07-06 |
ES2223520T3 (es) | 2005-03-01 |
KR20020012190A (ko) | 2002-02-15 |
EP1194214A1 (de) | 2002-04-10 |
DE50006971D1 (de) | 2004-08-05 |
EP1194214B1 (de) | 2004-06-30 |
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