WO2010126870A1 - Diesel aftertreatment system - Google Patents

Diesel aftertreatment system Download PDF

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Publication number
WO2010126870A1
WO2010126870A1 PCT/US2010/032522 US2010032522W WO2010126870A1 WO 2010126870 A1 WO2010126870 A1 WO 2010126870A1 US 2010032522 W US2010032522 W US 2010032522W WO 2010126870 A1 WO2010126870 A1 WO 2010126870A1
Authority
WO
WIPO (PCT)
Prior art keywords
exhaust
diesel
burner
fuel
receive
Prior art date
Application number
PCT/US2010/032522
Other languages
English (en)
French (fr)
Inventor
Adam J. Kotrba
Timothy E. Jackson
Dervis A Yetkln
Arda Gundogan
Timothy Gardner
Original Assignee
Tenneco Automotive Operating Company, Inc.
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 Tenneco Automotive Operating Company, Inc. filed Critical Tenneco Automotive Operating Company, Inc.
Priority to JP2012508583A priority Critical patent/JP2012525540A/ja
Priority to CN2010800185883A priority patent/CN102438729A/zh
Priority to EP10770197A priority patent/EP2424646A1/en
Priority to BRPI1015344A priority patent/BRPI1015344A2/pt
Publication of WO2010126870A1 publication Critical patent/WO2010126870A1/en

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
    • F01N3/02—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
    • F01N3/0231—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 special exhaust apparatus upstream of the filter for producing nitrogen dioxide, e.g. for continuous filter regeneration systems [CRT]
    • 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
    • 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
    • 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
    • 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
    • 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
    • F01N3/02—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
    • 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
    • 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
    • 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
    • F01N3/10—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
    • F01N3/105—General auxiliary catalysts, e.g. upstream or downstream of the main catalyst
    • F01N3/106—Auxiliary oxidation catalysts
    • 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
    • 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
    • F01N2240/14—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 burner
    • 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
    • F01N2610/03—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
    • 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

  • This invention relates to systems and methods for treating exhaust gases from a diesel combustion process, such as a diesel compression engine, and more particularly to systems for reducing oxides of nitrogen (NO x ) and particulate matter (PM) emissions from diesel compression engines.
  • a diesel combustion process such as a diesel compression engine
  • PM particulate matter
  • DPF diesel particulate filters
  • a diesei exhaust gas treatment system to treat the exhaust from a diesel combustion process.
  • the system includes a burner to receive the exhaust and selectively heat the exhaust with a flame to supply the exhaust at an elevated temperature to the rest of the system, a diesel particulate filter (DPF) connected downstream from the burner to receive the exhaust therefrom, and at least one of a selective catalytic reduction catalyst (SCR) and a NO x trap connected downstream from the diesel particulate filter to receive the exhaust therefrom.
  • DPF diesel particulate filter
  • SCR selective catalytic reduction catalyst
  • NO x trap connected downstream from the diesel particulate filter to receive the exhaust therefrom.
  • the system further includes a diesel oxidation catalyst connected downstream from the burner to receive the exhaust therefrom and upstream from the DPF to deliver the exhaust thereto.
  • the system further includes a fuel injector located downstream from the burner and upstream of the DOC.
  • the system further includes a diesel oxidation catalyst connected downstream from the DPF to receive the exhaust therefrom and upstream from the SCR to deliver the exhaust thereto.
  • the burner includes at least one fuel injector and at least one igniter.
  • the at least one of a selective catalytic reduction catalyst and a NO x trap is a selective catalytic reduction catalyst and further includes a reductant injector connected upstream from the catalyst.
  • a method for treating a diesel exhaust from a diesel combustion process.
  • the method includes the steps of: [0013] (a) selectively increasing the temperature of the exhaust by burning a fuel in the exhaust flow downstream from the diesel combustion process;
  • step (b) removing soot from a filter by oxidizing carbon into the increased temperature exhaust provided from step (a);
  • the method further includes the step of producing NO 2 by passing the exhaust from step (a) through an oxidation catalyst prior to step (b).
  • the method further includes the step of injecting fuel into the exhaust after step (a) and prior to step (b).
  • the method of further includes the step of producing NO 2 by passing the exhaust from step (b) through an oxidation catalyst prior to step (c).
  • step (a) includes the steps of injecting a fuel into the exhaust and Igniting the fuel.
  • step (c) includes converting NO x to N 2 by passing the exhaust over a selective catalytic reduction catalyst.
  • step (c) includes trapping NO x .
  • Fig. 1 is a diagrammatic representation of a diesei exhaust gas treatment system embodying the invention in connection with a diesei combustion engine
  • Figs. 2-4 are a representations similar to Fig. 1 , but showing alternate embodiments of the diesei exhaust gas treatment system.
  • a diesei exhaust gas aftertreatment system 10 is provided to treat the exhaust 12 from a diesei combustion process 14, such as a diesei compression engine 16.
  • the exhaust 12 will typically contain oxides of nitrogen (NO x ) such as nitric oxide (NO) and nitrogen dioxide (NO 2 ) among others, particular matter (PM), hydrocarbons, carbon monoxide (CO), and other combustion byproducts.
  • NO x oxides of nitrogen
  • PM particular matter
  • CO carbon monoxide
  • the system 10 includes a burner 18 that selectively supplies the exhaust 12 at an elevated temperature to the rest of the system 10, a diesei particulate filter (DPF) 20 connected downstream from the burner 18 to receive the exhaust 12 therefrom, and a NO x reducing device 22, such as a selective catalytic reduction catalyst (SCR) 24, as shown in Fig. 1 , or a lean NO x trap 26, as shown in Fig. 2, connected downstream from the DPF 20 to receive the exhaust 12 therefrom.
  • DPF a selective catalytic reduction catalyst
  • SCR selective catalytic reduction catalyst
  • an active regeneration process for the DPF 20 is employed wherein fuel is ignited in the burner 18 to create a flame 28 that heats the exhaust 12 to an elevated temperature that will ailow for oxidation of the PM in the DPF 20.
  • the burner 18 can be used in a similar manner to heat the exhaust 12 to an elevated temperature that will enhance the conversion efficiency of the SCR 24.
  • the burner 18 can provide such elevated temperatures, either selectively or continuously, independent of any particular engine operating condition, including operating conditions that produce a !ow temperature ( ⁇ 300C) in the exhaust 12 as it exits the engine 16.
  • the system 10 can be operated without requiring adjustments to the engine controls.
  • the burner 18 preferably will include one or more injectors 30 for injecting suitable fuel, a couple examples of which are hydrogen and hydrocarbons, and an oxygenator, such as air, to be ignited together with unbumed fuel already carried in the exhaust by one or more igniters, such as spark plugs 32.
  • each injector 30 can either be a combined injector that injects both the fuel and oxygenator, or a specific injector for one of the fuel or the oxygenator.
  • a control system shown schematically at 34, is provided to monitor and control the flows through the injectors 30 and the ignition by the igniters 32 using any suitable processor(s), sensors, flow control valves, electric coils, etc.
  • the DPF 20 can be of any suitable construction or type, many of which are known.
  • Any suitable catalyst can be utilized for the SCR 24, examples of which include Cu based, Iron based and Vandia based catalysts of any suitable construction or type.
  • the system 10 also includes an reductant injector 36, again of any suitable construction and type, that can introduce a nitrogenous reductant, such as ammonia, urea, hydrocarbons, hydrogen, or syngas into the exhaust 12 to reduce the NO x content in the exhaust 12 by preferably at least 25% and by as much as 99% under the right conditions.
  • the temperature in the SCR will be highly dependent upon the type of reductant used.
  • the injector 36 can be supplied by a pressurized reductant source (not shown) and controlled by the controller 34 or an independent controller (not shown).
  • any suitable construction and type of lean NO x trap 26 can be utilized and preferably will store NO 2 during operating conditions that utilize a lean fuel-air mixture, and reduce the stored NO 2 to N 2 and O 2 under operating conditions that utilize a rich fuel-air mixture.
  • supplemental hydrocarbon fuel can be injected upstream of the trap 26 to produce a rich fuel-air condition in the trap 26 to assist in forming N 2 , H 2 O and CO 2 . from the stored NO 2
  • the need for active regeneration of the DPF 20 by the system 10 can be determined by based on a number of parameters or combination of parameters, such as the DPF pressure drop, DPF soot mass, a predetermined operating time set point, and fuel consumption rate.
  • the active regeneration of the DPF 20 can be terminated based on a number of parameters or combination of parameters, such as the DPF pressure drop, DPF soot mass, and a predetermined regeneration time set point.
  • the injection of fuel and air via the injector(s) 30 can be based on a number of parameters or combination of parameters, including the flow rate of the exhaust 12, the oxygen concentration in the exhaust 12 and, the inlet and outlet temperatures of the exhaust 12 to and from the DPF 20, with flame stability being monitored by igniter ionization detection or by comparing the inlet and outlet temperatures of the exhaust 12 to and from the burner 18.
  • the system 10 can provide enhanced fuel efficiency in comparison to known aftertreatment systems that require excess fuel injection into the engine or system in order to obtain suitable regeneration of a DPF.
  • the burner 18 can be designed for a relatively low pressure drop in the exhaust 12 through the burner 18, particularly in comparison to systems that rely on passive or active regeneration by passing the exhaust through a DOC upstream of a DPF to provide sufficient NO 2 for passive regeneration of the DPF.
  • the passage of the exhaust 12 through the DPF 20 upstream of the SCR 24 tends to dampen the thermal fluctuations in the SCR 24 which can simplify the control of the reductant injection.
  • a DOC 40 is connected between the burner 18 and the DPF 20 to provide NO 2 in the exhaust 12 for passive regeneration of the DPF 20 at some level during operating conditions that are favorable to passive regeneration. This can reduce the demand for active regeneration by the burner 18 and thereby increase the overall fuel efficiency of the system 10.
  • Fig. 4 shows yet another embodiment of the system 10 similar to Fig 3, but having yet another DOC 42 added between DPF 20 and the SCR 24 to provide additional NO 2 to optimize the reactions in the SCR 24.
  • a fuel injector 44 can be added between the burner 18 and the DOC 40 to selectively provide additional fuel, two examples of which are hydrocarbon fuel and hydrogen, to enhance the reactions in the DOC 40 and produce additional quantities of NO 2 in the exhaust under certain operating conditions.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Analytical Chemistry (AREA)
  • Biomedical Technology (AREA)
  • Materials Engineering (AREA)
  • Toxicology (AREA)
  • Exhaust Gas After Treatment (AREA)
PCT/US2010/032522 2009-04-27 2010-04-27 Diesel aftertreatment system WO2010126870A1 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2012508583A JP2012525540A (ja) 2009-04-27 2010-04-27 ディーゼル後処理システム
CN2010800185883A CN102438729A (zh) 2009-04-27 2010-04-27 柴油后处理系统
EP10770197A EP2424646A1 (en) 2009-04-27 2010-04-27 Diesel aftertreatment system
BRPI1015344A BRPI1015344A2 (pt) 2009-04-27 2010-04-27 sistema de tratamento posterior de diesel

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US12/430,194 US20100269492A1 (en) 2009-04-27 2009-04-27 Diesel aftertreatment system
US12/430,194 2009-04-27

Publications (1)

Publication Number Publication Date
WO2010126870A1 true WO2010126870A1 (en) 2010-11-04

Family

ID=42990871

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2010/032522 WO2010126870A1 (en) 2009-04-27 2010-04-27 Diesel aftertreatment system

Country Status (7)

Country Link
US (1) US20100269492A1 (pt)
EP (1) EP2424646A1 (pt)
JP (1) JP2012525540A (pt)
KR (1) KR20120017018A (pt)
CN (1) CN102438729A (pt)
BR (1) BRPI1015344A2 (pt)
WO (1) WO2010126870A1 (pt)

Families Citing this family (28)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110283685A1 (en) * 2009-04-27 2011-11-24 Kotrba Adam J Exhaust Treatment System With Hydrocarbon Lean NOx Catalyst
US8656708B2 (en) 2011-01-31 2014-02-25 Tenneco Automotive Operating Company Inc. Coaxial inlet and outlet exhaust treatment device
JP5641134B2 (ja) * 2011-03-28 2014-12-17 トヨタ自動車株式会社 内燃機関の排気浄化装置
US9421496B2 (en) 2011-04-28 2016-08-23 Toyota Jidosha Kabushiki Kaisha Exhaust gas purification apparatus for internal combustion engine
WO2012147205A1 (ja) * 2011-04-28 2012-11-01 トヨタ自動車株式会社 内燃機関の排気浄化装置
US20130061579A1 (en) * 2011-09-14 2013-03-14 Adam J. Kotrba Exhaust Gas Aftertreatment System For Engines Equipped With Exhaust Gas Recirculation
CN103422946A (zh) * 2012-05-22 2013-12-04 广西玉柴机器股份有限公司 发动机dpf可控再生系统
US20130340717A1 (en) * 2012-06-22 2013-12-26 Michael Avery Methods and systems for conversion of single-fuel engine to multiple-fuel engine with diesel oxidation catalyst
US9103252B2 (en) 2013-03-15 2015-08-11 Tenneco Automotive Operating Company Inc. Modular exhaust treatment system
CN105051342B (zh) * 2013-03-15 2018-03-16 洋马株式会社 发动机装置
JP6437314B2 (ja) * 2015-01-08 2018-12-12 日野自動車株式会社 排気浄化装置
FR3042813B1 (fr) * 2015-10-27 2017-12-08 Peugeot Citroen Automobiles Sa Dispositif de post-traitement des gaz d’echappement d’un moteur a combustion
CN107013375B (zh) * 2016-01-27 2019-07-23 北京汽车股份有限公司 发动机组件及具有该发动机组件的车辆
WO2017145235A1 (ja) 2016-02-22 2017-08-31 日野自動車 株式会社 排気浄化システム
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US20100269492A1 (en) 2010-10-28
CN102438729A (zh) 2012-05-02

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