CN101666255A - Exhaust aftertreatment system - Google Patents

Exhaust aftertreatment system Download PDF

Info

Publication number
CN101666255A
CN101666255A CN200910172810A CN200910172810A CN101666255A CN 101666255 A CN101666255 A CN 101666255A CN 200910172810 A CN200910172810 A CN 200910172810A CN 200910172810 A CN200910172810 A CN 200910172810A CN 101666255 A CN101666255 A CN 101666255A
Authority
CN
China
Prior art keywords
equipment
particulate filter
filter arrangement
selective catalytic
coating
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.)
Pending
Application number
CN200910172810A
Other languages
Chinese (zh)
Inventor
J·H·李
D·B·布朗
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
GM Global Technology Operations LLC
Original Assignee
GM Global Technology Operations LLC
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 GM Global Technology Operations LLC filed Critical GM Global Technology Operations LLC
Publication of CN101666255A publication Critical patent/CN101666255A/en
Pending legal-status Critical Current

Links

Images

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
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/033—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices
    • F01N3/035—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters in combination with other devices with catalytic reactors, e.g. catalysed diesel particulate filters
    • 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
    • B01D53/944—Simultaneously removing carbon monoxide, hydrocarbons or carbon making use of oxidation catalysts
    • 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
    • B01D53/9445—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC]
    • B01D53/945—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC] characterised by a specific 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
    • 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
    • F01N3/10—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
    • F01N3/103—Oxidation catalysts for HC and CO only
    • 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
    • B01D2251/00—Reactants
    • B01D2251/20—Reductants
    • B01D2251/208—Hydrocarbons
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/10—Noble metals or compounds thereof
    • B01D2255/102—Platinum group metals
    • B01D2255/1021—Platinum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/10—Noble metals or compounds thereof
    • B01D2255/102—Platinum group metals
    • B01D2255/1023—Palladium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/10—Noble metals or compounds thereof
    • B01D2255/104—Silver
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/207—Transition metals
    • B01D2255/20761—Copper
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/209—Other metals
    • B01D2255/2092—Aluminium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/50—Zeolites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
    • B01J23/42—Platinum
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
    • B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
    • B01J23/48—Silver or gold
    • B01J23/50—Silver
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J29/00—Catalysts comprising molecular sieves
    • B01J29/04—Catalysts comprising molecular sieves having base-exchange properties, e.g. crystalline zeolites
    • B01J29/06—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof
    • B01J29/064—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof containing iron group metals, noble metals or copper
    • B01J29/072—Iron group metals or copper
    • 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
    • F01N2510/00—Surface coverings
    • F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
    • 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
    • F01N2510/00—Surface coverings
    • F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
    • F01N2510/065—Surface coverings for exhaust purification, e.g. catalytic reaction for reducing soot ignition temperature
    • 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
    • F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
    • F01N2570/12—Hydrocarbons
    • 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
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/023—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles
    • F01N3/025—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
    • F01N3/0253—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust adding fuel to exhaust gases
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Combustion & Propulsion (AREA)
  • Health & Medical Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Biomedical Technology (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • General Chemical & Material Sciences (AREA)
  • Toxicology (AREA)
  • Analytical Chemistry (AREA)
  • Environmental & Geological Engineering (AREA)
  • Materials Engineering (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Processes For Solid Components From Exhaust (AREA)

Abstract

An apparatus for treating an exhaust gas feedstream from an internal combustion engine operating lean of stoichiometry comprises a particulate filter device comprising a porous substrate element having a hydrocarbon-selective catalytically reactive washcoat. The hydrocarbon-selective catalytically reactive washcoat comprises a silver-oxide catalytic material on an alumina-based washcoat. An injection device is operative to inject a hydrocarbon reductant upstream of the particulate filter device.

Description

Exhaust after treatment system
Technical field
The disclosure relates to the used exhaust after treatment system of internal-combustion engine with the lean of stoichiometric with exhaust operation.
Background technique
The statement of this part only provides the background information relevant with the disclosure, might not constitute prior art.
Internal-combustion engine with the lean of stoichiometric with exhaust operation can produce the exhaust gas feedstream that comprises NOx effulent and particulate matter.Need exhaust after treatment system to manage this exhaust gas feedstream.
Summary of the invention
A kind of being used for from the equipment of handling with the exhaust gas feedstream of the internal-combustion engine of lean of stoichiometric with exhaust operation, this equipment comprises particulate filter arrangement, and this particulate filter arrangement comprises the porous substrate element with hydrocarbon selective catalytic reaction coating.Described hydrocarbon selective catalytic reaction coating comprises the silver oxide catalysis material that is positioned on the alumina base coating.Injection apparatus is operable to the injected upstream hydro carbons reducing agent at described particulate filter arrangement.
Description of drawings
With by way of example one or more mode of executions are described hereinafter with reference to accompanying drawing, in the accompanying drawings:
Fig. 1, Fig. 2 and Fig. 3 are the schematic representation according to motor of the present disclosure and exhaust after treatment system.
Embodiment
Referring now to accompanying drawing, wherein shown content only is used to illustrate some illustrative embodiments, limit it and be not used in, Fig. 1, Fig. 2 and Fig. 3 schematically show internal-combustion engine 10, control module (ECM) 5 and according to the mode of execution of exhaust after treatment system of the present disclosure.In Fig. 1, Fig. 2 and Fig. 3 and mode of execution described here, the identical reference numbers designate similar elements.
Exemplary engine 10 comprises that this burn cycle can comprise air inlet, compression, acting and exhaust stroke to repeat the multi-cylinder engine of burn cycle operation.Motor 10 is operated with sky-combustion ratio of lean of stoichiometric with exhaust selectively.Motor 10 can be with one of the compression ignition engine of lean of stoichiometric with exhaust operation and spark ignition engines.Motor 10 can be to comprise one or more combustion mode operations of compression ignite, spark ignition and controlled auto-ignition combustion pattern.Motor 10 comprises a plurality of reciprocating pistons that are attached to bent axle, and this bent axle operationally is attached to speed changer and vehicle drive system to carry tractive torque to it, and these are all not shown.Motor 10 produces that comprise can be by the exhaust gas feedstream of the component of after-treatment system conversion, and these components comprise for example hydrocarbon (hereinafter referred to as " HC "), carbon monoxide (hereinafter referred to as " CO "), nitrogen oxide (hereinafter referred to as " NOx ") and particulate matter (hereinafter referred to as " PM ").
Exhaust after treatment system comprises integrated system, and it is used under the situation that has the catalytic reaction material converting the component of exhaust gas feedstream to other form by redox process.Gas exhaust manifold (specifically not marking) is carried blast air, and it is guided to exhaust after treatment system.The exhaust after treatment system of Fig. 1 comprises catalysis device 14, injection apparatus 16 and particulate filter arrangement 20.The exhaust after treatment system of Fig. 2 comprises second catalysis device 24 in catalysis device 14, injection apparatus 16, particulate filter arrangement 20 and this particulate filter arrangement 20 downstreams.The exhaust after treatment system of Fig. 3 comprises second catalysis device 24 in particulate filter arrangement 20 and this particulate filter arrangement 20 downstreams.Aforementioned means preferably utilizes pipe to be connected with the serial fashion fluid with connector.
One or more detective device can be suitable for monitoring exhaust gas feedstream.Can each position in exhaust after treatment system be monitored by exhaust gas feedstream, wherein show position by some sensors 12,18,22,26 in the various sensors and 28 monitorings.The application of exhaust after treatment system can comprise one or more in sensor 12,18,22,26 and 28. Sensor 12,18,22,26 and 28 monitorings can with the component of exhaust gas feedstream and/or the exhaust gas feedstream parameter of temperature correlation, and produce the signal transfer to control module 5.This can comprise the sensor 12 of monitoring from the exhaust gas feedstream of motor 10 outputs, preferably includes NOx concentration and sky-combustion and one of compares.Sensor 26 can be monitored the exhaust gas feedstream in catalysis device 14 downstreams, preferably includes and NOx concentration, sky-fire one of temperature corresponding parameters when.The embodiment that comprises the system of sensor 12 can not comprise sensor 26.Sensor 18 can be monitored the exhaust gas feedstream of exporting and be positioned at injection apparatus 16 downstreams from catalysis device 14, preferably includes and one of NOx concentration and temperature corresponding parameters.Sensor 22 can be monitored the exhaust gas feedstream in particulate filter arrangement 20 downstreams, preferably includes and NOx concentration, temperature and ammonia (NH 3) one of corresponding parameters.As shown in Fig. 2 and Fig. 3, sensor 28 can be monitored the exhaust gas feedstream in second catalysis device, 24 downstreams in second mode of execution, preferred monitoring and one of NOx concentration, temperature and ammonia corresponding parameters.Control module 5 monitorings are from the signal of concrete sensor 12,18,22,26 and 28, and these signals are used for the control of motor 10 and injection apparatus 16, and be used to monitor the operation of motor 10, injection apparatus 16, catalysis device 14, particulate filter arrangement 20 and second catalysis device 24 with diagnosis fault wherein.Alternatively, can utilize virtual NOx sensing system to determine NOx concentration in the exhaust gas feedstream, but this virtual sensing system comprise the execution algorithm in the resident control module 5 based on engine speed/load operation characteristic.
The catalysis device of drawing in the mode of execution shown in Fig. 1 and Fig. 2 14 preferably includes oxidation catalyzer.Catalysis device 14 preferably is made of the substrate (not shown), is applied with coating and catalytic reaction material on substrate, for example platinum or palladium.This substrate can be metal foil device or the sintered ceramic device with a plurality of flow channels, can pass through for exhaust gas feedstream at motor these flow channels of 10 operation periods.This coating base plate is assembled in the hardware as the element of exhaust after treatment system.
The injection apparatus of drawing in the mode of execution shown in Fig. 1 and Fig. 2 16 preferably includes solenoid operated fluid flow control valve, this valve has fluid output, is suitable for the hydro carbons injection of reducing agent is mapped to the exhaust gas feedstream that is arranged in the catalysis device 14 that comprises oxidation catalyzer and sensor 26 downstreams and is positioned at particulate filter arrangement 20 upstreams.Injection apparatus 16 is operatively connected with control module 5, and these control module 5 controls are ejected into timing and the quality or the amount of the hydro carbons reducing agent in the exhaust gas feedstream.Preferably via the fuel tank supply of fluid connection from vehicle, these are all not shown for the hydro carbons reducing agent.
Particulate filter arrangement 20 comprises the filtrating equipment that is coated with the hydrocarbon selective catalytic reaction coating that is used for the reduction of NOx effulent.This filtrating equipment is caught particulate matter contained in the exhaust gas feedstream.Have filter inlet 19 and filter outlet 21.Particulate filter arrangement 20 arrives the mode of filter outlet 21 and constructs to cause the exhaust that enters filter inlet 19 to pass the part of particulate filter arrangement 20.As embodiment, particulate filter arrangement 20 can comprise the monoblock multichannel base component (not shown) that is made of porous material.There is lid each passage or near the end filter inlet 19, and perhaps there is lid near the end filter outlet 21, and wherein adjacency channel is added a cover in alternate ends.As embodiment, the porosity of base component is about 40% to 55%, and 40% to 55% of this expression base component volume comprises hole rather than baseplate material.These holes can have average less than about 3 microns diameter.The porous material of base component can be formed by stupalith, for example the steinheilite of extruding and sintering.
The porous material of multichannel substrate is coated with hydrocarbon selective catalytic reaction coating.Hydrocarbon selective catalytic reaction coating is also referred to as the HC-SCR coating, and it comprises with the hydro carbons reducing agent that sprays and reacting being N with the NOx gas reduction 2The chemical reaction material of O.Hydrocarbon selective catalytic reaction coating can comprise the alumina base cladding material, and chemical reaction material comprises selective catalytic reduction catalysts.Selective catalytic reduction catalysts can comprise silver-aluminium oxide (hereinafter referred to as " AgAl ") catalysis material, carries the Ag of predetermined weight percent on aluminum oxide coating layer 2O.A scope of this selective catalytic reduction catalysts can be applied as that silver is 1 to 4wt.% (weight percentage) among the AgAl, and the coating that is carried on the multichannel substrate loads on 0.5 to 4g/in 3Scope in.Alternatively, selective catalytic reduction catalysts can comprise with the copper mass load and be applied to copper on the coating on the board device.The coating base plate of particulate filter arrangement 20 is assembled in the hardware as the part of exhaust after treatment system.
Second catalysis device of drawing in the mode of execution shown in Fig. 2 and Fig. 3 24 preferably includes selective catalytic reduction device, and it comprises the monoblock multichannel ceramic substrate that is coated with the catalytic reaction coating that reacts with the exhaust gas feedstream of exporting from particulate filter arrangement 20.The ammonia that this catalytic reaction coating can cause with the NOx reduction of generation in the particulate filter arrangement 20 leaks and reacts.This catalytic reaction coating can comprise selective catalytic reduction catalysts, and selective catalytic reduction catalysts comprises the copper-zeolite catalysis material of the predetermined weight percent that is carried on the aluminum oxide coating layer.Second catalysis device 24 provides the reacting environment of the NOx in the ammonia reduction exhaust gas feedstream that utilizes catalysis device 14 outputs.Second catalysis device 24 also can comprise oxidation catalyzer, and this oxidation catalyzer is included in Al 2O 3Be coated with the monoblock multichannel ceramic substrate of the catalytic reaction coating that comprises Pt and/or Pd on the coating.The coating load can be 1-3g/in 3, wherein the Pt load is 3-150g/ft 3
Control module 5 is preferably the element of the distributed system that comprises a plurality of control modules that are suitable for providing motor 10 and other system coordination control when being applied to motor 10 and exhaust after treatment system on the vehicle (not shown).User interface (" UI ") 13 and the multiple arrangement signal communication of vehicle operators so as to the operation of control and guided vehicle (comprising motor 10).Vehicle operators comprises accelerator pedal, brake petal, Transmission gear selector and speed of a motor vehicle cruise control so as to the exemplary means of input is provided to user interface 13, and these are and specifically illustrate.Control module 5 is preferably communicated by letter with user interface 13 via local area network bus 6.Local area network bus 6 allows Control Parameter and the structured communication of order between various processors, control module and device.The concrete communication protocol of being utilized is special-purpose.
Control module 5 comprises general purpose digital computer, and this digital computer comprises: microprocessor or central processing unit; Storage medium, it comprises the nonvolatile memory that comprises ROM (read-only memory) and EPROM; Random access memory; High-frequency clock; Mould/number and digital/analog circuitry; Imput output circuit; And device and proper signal conditioning and buffering circuit.Control module 5 has one group of control algorithm, and this comprises resident program instructions and demarcation, and they are stored in the nonvolatile memory and are performed to provide corresponding function to control motor 10.These optimal algorithm selections are carried out during default cycle period, make each algorithm carry out at least once at each cycle period.By the central processing unit execution algorithm, and these algorithms can operate with monitoring from the input of above-mentioned detective device and carry out control and diagnostic routine to utilize the default operation of controlling actuator of demarcating.Preferably during motor that is moving and vehicle operating, carry out cycle period with rule interval (for example, per 3.125,6.25,12.5,25 and 100 milliseconds).Alternatively, can be in response to the generation execution algorithm of incident.
In the operation period of motor 10; control module 5 monitorings are from the input of detective device; to information carry out comprehensive and execution algorithm so that actuator is controlled, thereby realize control target, described control target comprises fuel economy, effulent, performance, cornering ability and hardware protection.Motor 10 is preferably with the lean of stoichiometric with exhaust operation, thereby generation is through the poor exhaust gas feedstream of exhaust after treatment system.
Control module 5 monitoring engine speeds and load and sky-combustion ratio, thereby determine the mass flow concentration of NOx effulent, and control injection apparatus 16 is to be ejected into timing and the quality or the amount of the hydro carbons reducing agent in the exhaust gas feedstream based on the mass flow concentration control of NOx effulent.The amount of the hydro carbons reducing agent that sprays is controlled to react with the NOx effulent and be reduced to nitrogen existing under the situation of selective catalytic reduction catalysts.
The disclosure has been described some preferred implementation and modification thereof.Those skilled in the art are by reading and understanding specification and can expect other modification and change.Therefore, be not intended the disclosure is confined to the disclosed embodiment of optimal mode conceived as implementing the disclosure, but the disclosure comprises all mode of executions that fall in the claims scope.

Claims (18)

1, a kind of equipment of handling from the exhaust gas feedstream of internal-combustion engine of being used for, this equipment comprises particulate filter arrangement, this particulate filter arrangement comprises the porous substrate element with hydrocarbon selective catalytic reaction coating, and this hydrocarbon selective catalytic reaction coating comprises the silver oxide catalysis material that is positioned on the alumina base coating.
2, equipment as claimed in claim 1 also comprises injection apparatus, and this injection apparatus is operable to and sprays the hydro carbons reducing agent in the exhaust gas feedstream of described particulate filter arrangement upstream.
3, equipment as claimed in claim 2 also comprises second catalysis device, and this second catalysis device fluid is connected the downstream of described particulate filter arrangement, and is included in the substrate that is coated with copper-zeolite catalysis material on the aluminum oxide coating layer.
4, equipment as claimed in claim 3, wherein said second catalysis device also comprises oxidation catalyzer, this oxidation catalyzer comprises the monoblock multichannel ceramic substrate that is coated with the catalytic reaction coating, and described catalytic reaction coating comprises at least a of the platinum that is arranged on the aluminum oxide coating layer and palladium.
5, a kind of equipment, this equipment comprises:
Than stoichiometric operation, and directly fluid is connected to exhaust after treatment system with poor sky-combustion for internal-combustion engine, this internal-combustion engine;
Described exhaust after treatment system comprises the oxidation catalyzer that is positioned at the particulate filter arrangement upstream;
Described particulate filter arrangement comprises hydrocarbon selective catalytic reaction coating; And
Injection apparatus, it is operable at described particulate filter arrangement injected upstream hydro carbons reducing agent.
6, equipment as claimed in claim 5, wherein said hydrocarbon selective catalytic reaction coating comprises the selective catalytic reduction catalysts that is carried on the cladding material.
7, equipment as claimed in claim 6, wherein said selective catalytic reduction catalysts comprises the silver oxide catalysis material.
8, equipment as claimed in claim 7, wherein said cladding material comprises the alumina base coating.
9, equipment as claimed in claim 6, the chemical reaction material of wherein said selective catalytic reduction catalysts comprises copper.
10, equipment as claimed in claim 5 also comprises the injection apparatus that is operable to jet engine fuel.
11, equipment as claimed in claim 5 also comprises second catalysis device that is positioned at described particulate filter arrangement downstream.
12, equipment as claimed in claim 11, wherein said second catalysis device comprises selective catalytic reduction device.
13, equipment as claimed in claim 5, wherein said internal-combustion engine comprises compression ignition engine.
14, equipment as claimed in claim 5, wherein said internal-combustion engine include selectively with the spark ignition engines of poor sky-combustion than operation.
15, equipment as claimed in claim 5 also comprises detective device, and this detective device is operable to the composition of the exhaust gas feedstream in the described exhaust after treatment system of monitoring.
16, a kind of being used for from the equipment of handling with the exhaust gas feedstream of the internal-combustion engine of lean of stoichiometric with exhaust operation, this equipment comprises:
Injection apparatus and the oxidation catalyzer that is positioned at the particulate filter arrangement upstream, described injection apparatus are operable to and spray the hydro carbons reducing agent in the exhaust gas feedstream between described oxidation catalyzer and described particulate filter arrangement; And
Described particulate filter arrangement, this particulate filter arrangement comprise the monoblock base component that is constituted and had hydrocarbon selective catalytic reaction coating by porous material.
17, equipment as claimed in claim 16, wherein said hydrocarbon selective catalytic reaction coating comprises the silver oxide catalysis material in the alumina base coating.
18, equipment as claimed in claim 16, wherein said hydrocarbon selective catalytic reaction coating comprises the copper oxide catalyzation material in the alumina base coating.
CN200910172810A 2008-09-03 2009-09-03 Exhaust aftertreatment system Pending CN101666255A (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/203573 2008-09-03
US12/203,573 US20100050616A1 (en) 2008-09-03 2008-09-03 Exhaust aftertreatment system

Publications (1)

Publication Number Publication Date
CN101666255A true CN101666255A (en) 2010-03-10

Family

ID=41723321

Family Applications (1)

Application Number Title Priority Date Filing Date
CN200910172810A Pending CN101666255A (en) 2008-09-03 2009-09-03 Exhaust aftertreatment system

Country Status (3)

Country Link
US (1) US20100050616A1 (en)
CN (1) CN101666255A (en)
DE (1) DE102009039512A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104903554A (en) * 2012-10-18 2015-09-09 庄信万丰股份有限公司 Close-coupled Selective Catalytic Reduction (SCR) system
CN104937229A (en) * 2013-01-24 2015-09-23 日野自动车株式会社 Exhaust gas purifier

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102010038153B3 (en) * 2010-10-13 2012-03-08 Ford Global Technologies, Llc. Particle sensor for protection of components of exhaust system of turbocharged engine, is arranged at lower pressure side of turbocharger, and outputs signal for switching off exhaust gas recirculation
GB2503243A (en) * 2012-06-18 2013-12-25 Johnson Matthey Plc Combined particulate filter and hydrocarbon trap
US20160084135A1 (en) * 2014-09-22 2016-03-24 Caterpillar Inc. Catalyst Protection Against Hydrocarbon Exposure

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080236145A1 (en) * 2007-04-02 2008-10-02 Geo2 Technologies, Inc. Emission Control System using a Multi-Function Catalyzing Filter
US7225613B2 (en) * 2005-01-26 2007-06-05 Ford Global Technologies, Llc Diesel engine after treatment device for conversion of nitrogen oxide and particulate matter
US8006484B2 (en) * 2005-02-14 2011-08-30 Eaton Corporation Systems and methods for reducing emissions of internal combustion engines using a fuel processor bypass
US20070044456A1 (en) * 2005-09-01 2007-03-01 Devesh Upadhyay Exhaust gas aftertreatment systems
KR100871898B1 (en) * 2005-10-28 2008-12-05 에스케이에너지 주식회사 Exhaust gas purifying device for diesel engine
US7506504B2 (en) * 2005-12-21 2009-03-24 Basf Catalysts Llc DOC and particulate control system for diesel engines
US7469531B2 (en) * 2006-09-20 2008-12-30 Gm Global Technology Operations, Inc. Method and apparatus to control injection of a reductant into an exhaust gas feedstream
US7650747B2 (en) * 2007-03-28 2010-01-26 Gm Global Technology Operations, Inc. Method and apparatus for exhaust gas purifying using hydrocarbon-selective catalytic reduction

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104903554A (en) * 2012-10-18 2015-09-09 庄信万丰股份有限公司 Close-coupled Selective Catalytic Reduction (SCR) system
CN104937229A (en) * 2013-01-24 2015-09-23 日野自动车株式会社 Exhaust gas purifier

Also Published As

Publication number Publication date
DE102009039512A1 (en) 2010-04-08
US20100050616A1 (en) 2010-03-04

Similar Documents

Publication Publication Date Title
CN101845978B (en) Exhaust gas treatment system including four-way catalyst and urea SCR catalyst and method of using the same
KR100957598B1 (en) Method and apparatus to control injection of a reductant into an exhaust gas feedstream
CN101985893B (en) Exhaust gas treatment system
EP1582711B1 (en) System and method for purifying an exhaust gas
CN107060967B (en) The method and apparatus of internal combustion engine for controller control to exhaust after treatment system
EP1451453B1 (en) System and methods for improved emission control of internal combustion engines
CN101617109B (en) Exhaust gas after treatment system (EATS)
CN109281737B (en) Method for controlling and monitoring oxidation catalyst device
CN102032032B (en) Method and apparatus for monitoring a hydrocarbon-selective catalytic reduction device
CN102733911B (en) Exhaust-gas treatment system for internal combustion engine
CN101802357B (en) On board diagnostic system
US20100199643A1 (en) Exhaust gas purification system
CN101949315B (en) Method and apparatus for ammonia formation in a catalytic converter
EP2206553A1 (en) Selective reduction catalyst
US20080066454A1 (en) Apparatus and Method to Inject a Reductant into an Exhaust Gas Feedstream
CN101275480B (en) Method and apparatus for exhaust gas purifying using hydrocarbon-selective catalytic reduction
US8128880B2 (en) NOx reduction catalyst and exhaust system using the same
CN102434258A (en) Exhaust gas treatment system for an internal combustion engine
US8240139B2 (en) Method for purifying nitrogen oxide in exhaust gas and exhaust system operating the same
CN101818678A (en) Exhaust after treatment system
CN103362613A (en) Carbon monoxide-selective oxidation catalysts
CN101666255A (en) Exhaust aftertreatment system
CN102889108A (en) Exhaust aftertreatment system for compression-ignition engines
JP4784761B2 (en) Exhaust purification device
KR101795402B1 (en) Exhaust system

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20100310