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
• • C—CHEMISTRY; METALLURGY
  • C01—INORGANIC CHEMISTRY
  • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
  • C01B3/00—Hydrogen; Gaseous mixtures containing hydrogen; Separation of hydrogen from mixtures containing it; Purification of hydrogen
  • C01B3/02—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen
  • C01B3/32—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air
  • C01B3/34—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents
  • C01B3/38—Production of hydrogen or of gaseous mixtures containing a substantial proportion of hydrogen by reaction of gaseous or liquid organic compounds with gasifying agents, e.g. water, carbon dioxide, air by reaction of hydrocarbons with gasifying agents using catalysts
  • C01B3/386—Catalytic partial combustion
• • 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
  • 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
  • F01N3/0871—Regulation of absorbents or adsorbents, e.g. purging
• • 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]
• • 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
  • F01N9/00—Electrical control of exhaust gas treating apparatus
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
  • F02D—CONTROLLING COMBUSTION ENGINES
  • F02D43/00—Conjoint electrical control of two or more functions, e.g. ignition, fuel-air mixture, recirculation, supercharging or exhaust-gas treatment
• • C—CHEMISTRY; METALLURGY
  • C01—INORGANIC CHEMISTRY
  • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
  • C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
  • C01B2203/02—Processes for making hydrogen or synthesis gas
  • C01B2203/025—Processes for making hydrogen or synthesis gas containing a partial oxidation step
  • C01B2203/0261—Processes for making hydrogen or synthesis gas containing a partial oxidation step containing a catalytic partial oxidation step [CPO]
• • C—CHEMISTRY; METALLURGY
  • C01—INORGANIC CHEMISTRY
  • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
  • C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
  • C01B2203/16—Controlling the process
  • C01B2203/1685—Control based on demand of downstream process
• • C—CHEMISTRY; METALLURGY
  • C01—INORGANIC CHEMISTRY
  • C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
  • C01B2203/00—Integrated processes for the production of hydrogen or synthesis gas
  • C01B2203/16—Controlling the process
  • C01B2203/169—Controlling the feed
• • 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
  • F01N2240/30—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 fuel reformer
• • 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
  • F01N2610/03—Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel
• • 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
  • F01N2610/04—Adding substances to exhaust gases the substance being hydrogen
• • 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
• • 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 device for purifying exhaust gases of an internal combustion engine, with an exhaust line, which has a NO x catalyst, and with a Reduktionsffenzu slaughterhouse landmark which is designed to suzuate- the exhaust line in front of the NO x catalyst reducing agent
• Invention a method for
• a problem of modern motor vehicles is the emission of nitrogen oxides (NO x ) which are produced during the combustion of gasoline or diesel in the internal combustion engine, in particular at high combustion chamber temperatures.
• NO x nitrogen oxides
• storage catalysts are known in which the NO x is collected and reduced to harmless nitrogen.
• reducing agent in the form of fuel before the NO x catalyst in the exhaust system.
• a reformate may optionally be used as a reducing agent.
• powerful blowers, air compressors or injectors are used in the prior art, but they are expensive and maintenance-prone.
• the object of the present invention is to further develop the generic devices and methods of this kind. _
• the device according to the invention is based on the generic state of the art in that the reducing agent supply device comprises a reformer which is designed to convert exhaust gas and fuel leaving the internal combustion engine into a reformate serving as a reducing agent.
• the exhaust gas of the internal combustion engine contains a significant proportion of oxygen, which in addition to the fuel is a starting material for generating a reformate. Taking out this exhaust gas shortly after the 'engine, it has a ⁇ correspondingly high pressure level. Due to the high pressure level of the exhaust gas removed, it is possible without additional measures to introduce the reformate before the NO x catalyst in the exhaust gas strands. The expensive and maintenance-prone devices required to produce the pressure required to introduce the reformate can therefore be dispensed with according to the invention.
• the extracted exhaust gas and the fuel are mixed in the reformer and fed to a reforming catalyst.
• a reformate gas with a proportion of the reducing gases hydrogen and carbon monoxide is produced. testifies. These gases are suitable for reducing the nitrogen oxides in the NO x catalyst to harmless nitrogen.
• the exhaust gas supplied to the reformer is obtained via an exhaust-gas branch branch, which is arranged directly downstream of the internal combustion engine.
• the exhaust pressure is high and therefore particularly well suited to introduce the reformate against the exhaust back pressure in the exhaust system.
• the exhaust gas supplied to the reformer is obtained via an exhaust gas branch branch which has an exhaust gas metering device.
• the exhaust gas metering device makes it possible for the reformer to each be supplied with the amount of exhaust gas required to produce the reformate.
• the Abgasdosier beautiful can operate controlled or regulated.
• the exhaust gas metering device comprises a valve device.
• the valve device may, for example, be a metering valve similar to a valve for exhaust gas recirculation.
• the Abgasdosiereinrich- device comprises a blower. Due to the high pressure level of the exhaust gas supplied to the blower, however, the blower can be designed with a significantly lower power than is required in the prior art. _ _
• the erfindungsgeraäße device can be further developed in an advantageous manner that the exhaust gas supplied to the reformer is obtained via a Abgasstranga Listeeist, which is arranged in front of another catalyst which is upstream of the NO x catalyst.
• the further catalyst may be, for example, the main catalyst of the exhaust gas purification system, wherein the exhaust gas is removed before the further catalyst and the reformate is introduced into the exhaust gas line between the further catalyst and the NO x catalyst.
• the device comprises a fuel pump designed to deliver fuel from a fuel tank.
• the fuel pump may in particular be a fuel metering pump with which the fuel quantity required for generating the reformate can be conveyed out of the fuel tank.
• the fuel pump can also be operated in a controlled or regulated manner.
• the fuel is taken from a fuel line of the fuel system of the internal combustion engine and that the fuel is supplied to the reformer via a fuel valve device.
• the fuel line may in particular be a fuel pressure line, for example a common rail return.
• the fuel valve device may in particular be a fuel metering valve with which the fuel quantity required to produce the reformate is transmitted.
• the fuel valve device can also be controlled or regulated.
• the inventive method is based on the generic state of the art in that reformer produced by a reformer is used as a reducing agent, wherein the reformer generates the reformate from exhaust gas, which exits the internal combustion engine, and fuel.
• the exhaust gas supplied to the reformer is obtained via an exhaust gas branch branch, which is arranged directly downstream of the internal combustion engine.
• the exhaust gas supplied to the reformer is obtained via an exhaust gas branch branch which has an exhaust gas metering device.
• the exhaust gas metering device comprises a valve device.
• the exhaust gas metering device comprises a fan.
• the exhaust gas supplied to the reformer is obtained via an exhaust gas branch branch, which is arranged in front of a further catalyst, which is connected upstream of the NO x catalyst.
• the fuel supplied to the reformer is pumped by a fuel pump.
• the fuel is taken from a fuel line of the fuel system of the internal combustion engine and that the fuel is supplied to the reformer via a fuel valve device.
• a particular advantage of the solution according to the invention is the independence of the exhaust gas back pressure of the exhaust system and thus of the load state of the internal combustion engine, since the reformer pressure always adapts to the level of the exhaust gas pressure.
• the system pressure across the reformer system is thus always approximately constant and independent of the load of the engine and the exhaust back pressure.
• Figure 1 is a schematic block diagram showing a first embodiment of the device according to the invention which is suitable for carrying out the method according to the invention.
• FIG. 2 shows a schematic block diagram which illustrates a second embodiment of the device according to the invention, which is likewise suitable for carrying out the method according to the invention.
• an internal combustion engine IO is assigned an exhaust gas line 12 which comprises a NO x catalytic converter 14 and a further catalytic converter 24, the further catalytic converter 24 being the main catalytic converter.
• an exhaust branch branch 20 is provided which communicates with a reformer 18 via an exhaust gas metering device 22.
• the exhaust gas metering device 22 is formed by an exhaust gas metering valve.
• a fuel pump 26 is provided to supply fuel from a fuel tank 28 to the reformer 18 in metered form.
• the exhaust branch 20, the Abgasdosier recruited 22, the fuel pump 26 and the reformer 18 together form a Reduktionsffenzu slaughter.
• the extracted exhaust gas and the supplied fuel are mixed and fed to a (not shown) reforming catalyst, which is part of the reformer 18.
• a gaseous reformate is generated which contains a proportion of the reducing gases hydrogen and carbon monoxide. The generated _
• FIG. 2 shows a schematic block diagram illustrating a second embodiment of the device according to the invention, which is also suitable for carrying out the method according to the invention.
• the embodiment illustrated in FIG. 2 differs from the embodiment according to FIG. 1 in that the exhaust gas metering device 22 is formed by a fan and that no fuel pump but a fuel valve device 32 is provided.
• the fan forming the exhaust-gas metering device 22 may be a comparatively low-performance fan, since there is a high exhaust gas pressure at the exhaust-gas branch branch 20.
• the fuel valve device 32 is realized by a fuel metering valve, which is connected between a fuel line 30 of the fuel system of the internal combustion engine 10 and the reformer 18.
• the fuel line 30 of the fuel system of the internal combustion engine 10 may in particular be a fuel pressure line, for example a common Rai1 return line. This solution lies _ ___
• a controller (not shown) may be provided for controlling the respective components, as has been explained in connection with the embodiment according to FIG.
• the advantage of the independence from the exhaust backpressure and the engine load remains even in the embodiment according to FIG.
• the Abgasdosier Ranéет can also be formed in the embodiment of Figure 2 by a valve device; In the embodiment according to FIG. 1, alternatively, a blower can be used.

Landscapes

• Engineering & Computer Science (AREA)
• Chemical & Material Sciences (AREA)
• Combustion & Propulsion (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Health & Medical Sciences (AREA)
• Organic Chemistry (AREA)
• Toxicology (AREA)
• General Health & Medical Sciences (AREA)
• Inorganic Chemistry (AREA)
• Exhaust Gas After Treatment (AREA)

Priority Applications (5)

Applications Claiming Priority (2)

Publications (1)

Family

ID=36926325

Family Applications (1)

Country Status (9)

Cited By (1)

Families Citing this family (3)

Citations (8)

Family Cites Families (9)

• 2005
  • 2005-06-02 DE DE102005025455A patent/DE102005025455B4/de not_active Expired - Fee Related
  • 2005-06-02 DE DE102005063323A patent/DE102005063323A1/de not_active Withdrawn
• 2006
  • 2006-06-01 AU AU2006254533A patent/AU2006254533B2/en not_active Ceased
  • 2006-06-01 US US11/921,413 patent/US20090044519A1/en not_active Abandoned
  • 2006-06-01 CN CNA2006800191055A patent/CN101273189A/zh active Pending
  • 2006-06-01 WO PCT/DE2006/000957 patent/WO2006128449A1/de active Application Filing
  • 2006-06-01 EP EP06742398A patent/EP1888889A1/de not_active Withdrawn
  • 2006-06-01 KR KR1020077029708A patent/KR100923521B1/ko not_active IP Right Cessation
  • 2006-06-01 JP JP2008513925A patent/JP2008542606A/ja not_active Withdrawn
  • 2006-06-01 CA CA002611027A patent/CA2611027A1/en not_active Abandoned

Patent Citations (8)

Non-Patent Citations (1)

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