[go: up one dir, main page]

US20090260346A1 - Method for purification of an exhaust gas from a diesel engine - Google Patents

Method for purification of an exhaust gas from a diesel engine Download PDF

Info

Publication number
US20090260346A1
US20090260346A1 US12/421,947 US42194709A US2009260346A1 US 20090260346 A1 US20090260346 A1 US 20090260346A1 US 42194709 A US42194709 A US 42194709A US 2009260346 A1 US2009260346 A1 US 2009260346A1
Authority
US
United States
Prior art keywords
catalyst
exhaust gas
support
particulate matter
reductant
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.)
Abandoned
Application number
US12/421,947
Other languages
English (en)
Inventor
Ioannis Gekas
Keld Johansen
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.)
Topsoe AS
Original Assignee
Individual
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 Individual filed Critical Individual
Assigned to HALDOR TOPSOE A/S reassignment HALDOR TOPSOE A/S ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: GEKAS, IOANNIS, JOHANSEN, KELD
Publication of US20090260346A1 publication Critical patent/US20090260346A1/en
Abandoned 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
    • F01N3/08—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
    • F01N3/206—Adding periodically or continuously substances to exhaust gases for promoting purification, e.g. catalytic material in liquid form, NOx reducing agents
    • F01N3/2066—Selective catalytic reduction [SCR]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9459—Removing one or more of nitrogen oxides, carbon monoxide, or hydrocarbons by multiple successive catalytic functions; systems with more than one different function, e.g. zone coated catalysts
    • B01D53/9477—Removing one or more of nitrogen oxides, carbon monoxide, or hydrocarbons by multiple successive catalytic functions; systems with more than one different function, e.g. zone coated catalysts with catalysts positioned on separate bricks, e.g. exhaust systems
    • 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
    • F01N13/009—Exhaust or silencing apparatus characterised by constructional features having two or more separate purifying devices arranged in series
    • F01N13/0097—Exhaust or silencing apparatus characterised by constructional features having two or more separate purifying devices arranged in series the purifying devices are arranged in a single housing
    • 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
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2251/00—Reactants
    • B01D2251/20—Reductants
    • B01D2251/206—Ammonium compounds
    • B01D2251/2062—Ammonia
    • 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
    • B01D2255/1023—Palladium
    • 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
    • B01D2255/20707—Titanium
    • 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
    • B01D2255/20723—Vanadium
    • 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
    • B01D2255/20738—Iron
    • 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
    • B01D2255/50—Zeolites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/90—Physical characteristics of catalysts
    • B01D2255/904—Multiple catalysts
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2258/00—Sources of waste gases
    • B01D2258/01—Engine exhaust gases
    • B01D2258/012—Diesel engines and lean burn gasoline engines
    • 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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00—Road transport of goods or passengers
    • Y02T10/10—Internal combustion engine [ICE] based vehicles
    • Y02T10/12—Improving ICE efficiencies

Definitions

  • the invention relates to a method for purification of an exhaust gas from an internal combustion engine.
  • the invention is specifically directed to cleaning of an exhaust gas from a diesel engine, especially engines in vehicles, which often start with cold engine and cold exhaust gas system.
  • Gas is led from a combustion engine to a diesel particulate filter in the process disclosed in US 2007/0089403, where the filter is coated with an oxidation/NO x storage catalyst. After injection of a reductant the gas passes a hydrolysis catalyst before entering a selective reduction catalyst, after which it passes an ammonia guard catalyst and streams to the atmosphere. This process is a little complicated, the gas to the selective reduction is not sufficiently hot and must pass a hydrolysis catalyst before entering the reduction catalyst, after which an ammonia guard catalyst is needed.
  • US 2006/0107649 discloses an exhaust gas cleaning process, where NO x is reduced, particles are caught in a filter and CO, hydrocarbons and NO x are thereafter oxidised. However, no additional heat can be added to the filter to burn off caught soot and particulate matter.
  • Exhaust gas is cleaned in two parallel trains in the process disclosed in U.S. Pat. No. 6,823,660. In each train the gas passes an oxidation catalyst, a diesel particulate filter and a selectively reducing catalyst. This process does not supply sufficient heat for regeneration of the filter and control of NO x reduction.
  • Reduction and subsequent oxidation of impurities in exhaust gas are comprised in the process of U.S. Pat. No. 5,431,893.
  • Reductant is injected to the exhaust gas upstream of a pyrolysation channel, a mixing channel and a reduction catalyst.
  • the temperature of the oxidation catalyst cannot be adjusted, and particles may block the filter or pass through the filter.
  • the invention provides a method for removing impurities in exhaust gas from a diesel engine, where the impurities comprise nitrogen oxides, carbon monoxide, particulate matter and incompletely combusted hydrocarbons.
  • the method comprises the steps of injection in excess compared to stoichiometric ratio of a reductant comprising urea or ammonia into the exhaust gas from the engine, selective catalytic reduction of the nitrogen oxides in the exhaust gas by the reductant in the presence of a catalyst active in selective reduction of nitrogen oxides to nitrogen and intermittent injection of a hydrocarbon into this effluent.
  • the succeeding steps are oxidation of carbon monoxide, particulate matter, incompletely combusted hydrocarbons and injected hydrocarbon in the presence of a catalyst active in oxidising carbon monoxide, particulate matter and hydrocarbons, to carbon dioxide and water, and in selectively oxidising possible excess of reductant to free nitrogen, and filtration of the effluent by passing the gas through a catalysed filter, wherein the remaining particulate matter is retained in the filter, and wherein the catalyst is active in oxidising carbon monoxide, particulate matter and hydrocarbons to carbon dioxide and water, and in selectively oxidising reductant to nitrogen creating a purified exhaust gas.
  • the method further comprises the step of a pre-oxidation of carbon monoxide, particulate matter, nitrogen oxides and incompletely combusted hydrocarbons in the exhaust gas from the engine in the presence of a catalyst active in oxidising the carbon monoxide, nitrogen oxides, hydrocarbons and particulate matter to carbon dioxide, nitrogen dioxide and water prior to the injection of reductant.
  • FIG. 1 is a schematic drawing showing one preferred embodiment of the method of the invention.
  • FIG. 2 is a schematic drawing showing another preferred embodiment of the method of the invention.
  • FIG. 3 is a print-out from measurement of pressure drop across diesel particle filter during test.
  • Diesel engines operate with excess air and their exhaust gasses comprise nitrogen oxides, NO x , carbon monoxide, CO, particulate matter and incompletely combusted hydrocarbons, which all implement health risk.
  • the present invention provides a method, wherein nitrogen oxides are catalytically, selectively reduced to free nitrogen. Subsequently CO and incompletely combusted hydrocarbons are oxidised. Finally, particulate matter is caught and remaining CO and incompletely combusted hydrocarbons are oxidised in a filter. These reactions take place in an optimal way, when the exhaust gas and the system are heated up to 250-500° C.
  • the exhaust gas from the diesel engine is passed to a pre-oxidising catalyst, where a considerable part of carbon monoxide, unburned hydrocarbons, particulate matter, and NO x is oxidised to carbon dioxide, water and NO 2 upstream of the selective, catalytic reduction of NO x .
  • the reduction catalyst can be a zeolites catalyst.
  • FIG. 1 illustrates one preferred embodiment of the invention, where fuel 1 is combusted with air 2 in combustion engine 3 , and the formed exhaust gas 4 is mixed with injected reductant 7 .
  • a preferred reductant is an aqueous solution of urea, which disintegrates to ammonia and carbon dioxide at and above 200° C.
  • This mixed gas flows to a Selective, Catalytic Reduction, SCR, catalyst 8 , which promotes reduction of nitrogen oxides by the reductant, ammonia, resulting in free nitrogen and water.
  • the catalyst for selective reduction can be a mixture of base metal oxides as the active phase supported on a carrier of one or more metal oxides.
  • the base metals are chosen from vanadium, tungsten, cerium and manganese, and the preferred catalysts are vanadium and tungsten oxide supported on titania or alumina or ceria, or cerium oxide/tungsten oxide supported on titania or alumina, or manganese oxide supported on titania or alumina or ceria.
  • the catalyst for selective reduction can be a zeolite, especially an ion exchanged zeolite supported on an inert substrate, preferably cordierite, and the preferred zeolites is copper and/or iron exchanged beta or ZSM-5 zeolite.
  • the catalyst will typically be in the form of a monolithic structure but can also be in the form of foam or metal mesh.
  • the reductant might also be ammonia or an aqueous solution of ammonia.
  • the reductant can be added in a slight excess compared to stoichiometric ratio, which ensures a very high degree of conversion of the poisonous nitrogen oxides to free nitrogen.
  • Hydrocarbon 10 is intermittently injected into SCR effluent 9 , when needed for increasing the temperature.
  • the hydrocarbon can be diesel fuel.
  • This exhaust gas flows to a Diesel Oxidation Catalyst, DOC, 11 where a substantial part of the CO and incompletely combusted hydrocarbons and particulate matter are oxidised to water and carbon dioxide. Excess of ammonia is selectively oxidised to free nitrogen. In this way, the DOC 11 also acts as an ammonia slip guard.
  • the oxidation catalyst is a precious metal(s) catalyst on metal oxide carriers such as aluminium oxide, cerium oxide, zirconium oxide titanium oxide or a zeolite.
  • metal oxide carriers such as aluminium oxide, cerium oxide, zirconium oxide titanium oxide or a zeolite.
  • the requirement to the amount of the noble metal is low.
  • Precious metals are platinum, palladium or rhodium, which are present as mixtures or as single precious elements, where platinum and palladium are the preferred metals, preferably on a titania support.
  • the precious metals can also be substituted by base metals, typically manganese, copper, cobalt and chromium.
  • the DOC catalyst will typically be in the form of a monolithic structure, but can also be in the form of foam or metal mesh.
  • Both the amount of reductant and of hydrocarbon is monitored by the electronic computing unit. This can both be a separate CPU or the CPU of the engine.
  • the nearly purified exhaust gas 12 flows to a catalysed Diesel Particulate Filter, c-DPF, 13 .
  • Particulate matter is caught in the filter and the catalyst on the surface of the filter promotes the oxidation of the particles as well as the selective oxidation of remaining ammonia, carbon monoxide and hydrocarbons.
  • the catalyst is a Pt-free coat on the filter, which can be a cordierite filter.
  • the coat is a metal oxide acting as a carrier for a precious metal different from platinum, where the preferred precious metal is palladium.
  • the carrier coat is an oxide of cerium, zirconium, aluminium or titanium, where the preferred oxide is titania.
  • the amount of hydrocarbons 10 injected up-stream of DOC 11 will influence the temperature not only in the DOC 11 , but also in the c-DPF 13 as well and thereby enhance combustion of collected particles by the increased temperature of c-DPF.
  • the catalyst 8 for SCR is readily heated by warm exhaust gas coming directly from the engine to the temperature, where urea is disintegrated to ammonia and where nitrogen oxides are reduced.
  • FIG. 2 shows another preferred embodiment of the invention.
  • Fuel 1 is combusted by air 2 in diesel engine 3 and the formed exhaust gas 4 flows to a pre-oxidising catalyst 5 , where a substantial part of CO, NO, particulate matter and remaining HC are oxidised, before this pre-oxidised exhaust gas 6 is mixed with reductant 7 and flows to SCR catalyst 8 , where nitrogen oxides are reduced to free nitrogen.
  • the NO x free exhaust gas 9 is further cleaned in the same way as in the process described by FIG. 1 .
  • the formed nitrogen dioxide supports the selective, catalytic reduction of nitrogen oxides to free nitrogen and that a zeolite catalyst can be used for the SCR reaction.
  • the pre-oxidising catalyst 5 consists of precious metals on one or more metal oxide carriers as aluminium oxide, cerium oxide, zirconium oxide titanium oxide or a zeolite where the requirement to the amount of the noble metal is low.
  • This catalyst shall have the ability to oxidise NO to NO 2 besides the ability to oxidise carbon monoxide and hydrocarbons to carbon dioxide and water.
  • a preferred catalyst is a mixture of the precious metals platinum and palladium on aluminium oxide/cerium oxide carrier.
  • the precious metals can be mixtures or single precious elements.
  • the precious metals may be substituted by base metals including manganese, copper, cobalt and chromium.
  • the pre-DOC catalyst will typically be in the form of a monolithic structure but can also be in the form of foam or metal mesh.
  • the method of the invention is useful for systems for purifying exhaust gas from diesel engines, especially engines installed in cars, vans, vehicles, trains, vessels and power plants.
  • the amount of injected urea solution was varied as shown in Table 2, whereas no hydrocarbon was injected upstream of the DOC.
  • the catalysts used for the evaluation were from current Haldor Topsoe A/S development:
  • the efficiency of removal of particulate matter was determined as build-up of pressure drop across the filter and given in FIG. 3 .
  • Euro VI European Transient Cycle
  • test results show clearly that particulate matter is oxidised, as it can be seen in FIG. 3 that the pressure drop across the c-DPF does not increase during operation, as shown.
  • the engine which was used for the tests, was an old engine and the emission of impurities was much higher that the emission from modern engines.
  • the purification system of the invention will easily fulfil future Euro VI requirements for limits of emissions from modern vehicles.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Analytical Chemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Oil, Petroleum & Natural Gas (AREA)
  • Biomedical Technology (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Catalysts (AREA)
  • Exhaust Gas Treatment By Means Of Catalyst (AREA)
  • Processes For Solid Components From Exhaust (AREA)
US12/421,947 2008-04-22 2009-04-10 Method for purification of an exhaust gas from a diesel engine Abandoned US20090260346A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DKPA200800575 2008-04-22
DKPA200800575 2008-04-22

Publications (1)

Publication Number Publication Date
US20090260346A1 true US20090260346A1 (en) 2009-10-22

Family

ID=40863620

Family Applications (1)

Application Number Title Priority Date Filing Date
US12/421,947 Abandoned US20090260346A1 (en) 2008-04-22 2009-04-10 Method for purification of an exhaust gas from a diesel engine

Country Status (4)

Country Link
US (1) US20090260346A1 (ru)
EP (1) EP2112341B1 (ru)
CN (1) CN101564646B (ru)
RU (1) RU2517714C2 (ru)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100300076A1 (en) * 2007-10-23 2010-12-02 Pierre Henri Maesse Process For Controlling The Injection Of Urea In A Selective Catalytic Reduction System
CN102000507A (zh) * 2010-11-05 2011-04-06 中国石油大学(北京) 用于柴油车尾气处理的还原气注入及四效催化净化系统
WO2011100809A1 (en) 2010-02-19 2011-08-25 Vladko Todorov Panayotov Method for removing harmful emission from exhaust gases
US20110239624A1 (en) * 2010-04-06 2011-10-06 Gm Global Technology Operations, Inc. Apparatus and method for regenerating an exhaust filter
US20110283680A1 (en) * 2009-02-20 2011-11-24 Ioannis Gekas Method for purification of exhaust gas from a diesel engine
WO2013104633A1 (en) 2012-01-09 2013-07-18 Eminox Limited Exhaust system and method for reducing particulate and no2 emissions
US8987161B2 (en) 2010-08-13 2015-03-24 Ut-Battelle, Llc Zeolite-based SCR catalysts and their use in diesel engine emission treatment
US9616384B2 (en) 2014-06-11 2017-04-11 Basf Se Base metal catalyst
US9737878B2 (en) 2007-10-15 2017-08-22 SDCmaterials, Inc. Method and system for forming plug and play metal catalysts
GB2552072A (en) * 2016-05-31 2018-01-10 Johnson Matthey Plc Vanadium catalysts for high engine-out NO2 systems
WO2019186485A1 (en) * 2018-03-29 2019-10-03 Johnson Matthey Public Limited Company Exhaust system including scrf catalyst with oxidation zone
WO2020221682A1 (en) * 2019-04-29 2020-11-05 Basf Corporation Exhaust gas treatment system for ultra low nox and cold start
US11149617B2 (en) * 2016-08-19 2021-10-19 Kohler Co. System and method for low CO emission engine
US11338272B2 (en) * 2019-10-18 2022-05-24 Daeyoung C&E Catalyst capable of directly decomposing urea and method for urea decomposition using the same
CN114592958A (zh) * 2021-02-09 2022-06-07 长城汽车股份有限公司 燃油发动机尾气后处理系统及方法
US11541379B2 (en) * 2018-08-31 2023-01-03 Johnson Matthey Public Limited Company Bimetallic Cu/Mn catalysts for selective catalytic reduction

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102125834B (zh) * 2011-01-14 2012-11-28 上海交通大学 钛基纳米复合金属氧化物催化剂及其制备方法
US8491860B2 (en) * 2011-08-17 2013-07-23 Ford Global Technologies, Llc Methods and systems for an engine emission control system
EP2850294B2 (en) * 2012-04-27 2019-09-11 Umicore AG & Co. KG Method and system for the purification of exhaust gas from an internal combustion engine
KR101254068B1 (ko) * 2012-10-17 2013-04-12 대영씨엔이(주) 선택적 촉매환원반응용 촉매 모듈 소자, 상기 촉매 모듈 소자로 제조되는 촉매 모듈 및 이들의 제조방법
US20150375207A1 (en) * 2013-02-14 2015-12-31 Haldor Topsoe A/S Method and catalyst for the simultaneous removal of carbon monoxide and nitrogen oxides from flue or exhaust gas
GB2512648B (en) * 2013-04-05 2018-06-20 Johnson Matthey Plc Filter substrate comprising three-way catalyst
EP2826971A1 (de) * 2013-07-17 2015-01-21 DEUTZ Aktiengesellschaft Verfahren zur Verminderung von Stickoxiden in dieselmotorischen Abgasen und Abgasnachbehandlungssystem zur Durchführung des Verfahrens
BR112016019709B1 (pt) * 2014-02-28 2022-06-28 Umicore Ag & Co. Kg Método para a limpeza dos gases de escape de um motor de ignição de compressão
CN104018918B (zh) * 2014-06-09 2016-08-17 盐城工学院 一种柴油机尾气净化装置及其制备方法
CN105056970B (zh) * 2015-08-17 2018-12-11 中自环保科技股份有限公司 一种柴油车催化剂型颗粒物净化器的制备方法
CN106378179A (zh) * 2016-08-18 2017-02-08 上海歌地催化剂有限公司 宽温度窗口的组合分子筛scr催化剂
TW201838708A (zh) * 2017-03-02 2018-11-01 丹麥商托普索公司 用於移除來自工廠的廢氣所含有的硫氧化物和氮氧化物的方法
EP3707356B1 (en) * 2017-11-10 2025-03-05 BASF Mobile Emissions Catalysts LLC Catalyzed soot filter with reduced ammonia oxidation
DK201700681A1 (en) * 2017-12-01 2019-06-20 HANS JENSEN GREENTECH ApS A Selective Catalytic Reduction System and a Method for NOx Reduction
CN111185167B (zh) * 2020-03-19 2021-06-08 中国科学院过程工程研究所 一种用于CO净化的Pt基催化剂及其制备方法和用途
CN114575978A (zh) * 2021-02-18 2022-06-03 长城汽车股份有限公司 一种处理含氮氧化物气体的系统及方法
CN116870904B (zh) * 2023-07-12 2025-10-31 无锡威孚环保催化剂有限公司 一种促进汽车尾气净化的催化剂

Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3903020A (en) * 1972-07-14 1975-09-02 Grace W R & Co Stabilized automotive exhaust gas catalyst
US5081095A (en) * 1990-09-10 1992-01-14 General Motors Corporation Method of making a support containing an alumina-ceria washcoat for a noble metal catalyst
US5431893A (en) * 1992-02-24 1995-07-11 Hug; Hans T. Cleaning exhaust gases from combustion installations
US6255249B1 (en) * 1991-11-26 2001-07-03 Engelhard Corporation Oxidation catalyst and method of use
US20030167756A1 (en) * 2002-03-07 2003-09-11 Szymkowicz Patrick G. After-treatment system and method for reducing emissions in diesel engine exhaust
US6823660B2 (en) * 2001-12-13 2004-11-30 Isuzu Motors Limited Exhaust emission purification system for diesel engine
US6892529B2 (en) * 2002-02-25 2005-05-17 Daimlerchrysler Ag Exhaust-gas purification system for an internal combustion engine
US20060107649A1 (en) * 2002-08-26 2006-05-25 Masayuki Kamikawa Apparatus and method for clarifying exhaust gas of diesel engine
US20070089403A1 (en) * 2003-02-26 2007-04-26 Umicore Ag & Co. Kg Exhaust-gas purification system for the selective catalytic reduction of nitrogen oxides in the lean exhaust gas of internal combustion engines and method of exhaust-gas purification
US20070160508A1 (en) * 2005-12-09 2007-07-12 Mitsubishi Fuso Truck And Bus Corporation Exhaust gas purification device
US20070277507A1 (en) * 2006-06-06 2007-12-06 Eaton Corporation Enhanced hybrid de-NOx system
US20070289289A1 (en) * 2006-06-16 2007-12-20 Denso Corporation Exhaust emission purifier with additive feeder unit and pressurized air introducer unit
US20080066451A1 (en) * 2006-09-18 2008-03-20 Jay Warner Exhaust treatment packaging apparatus, system, and method
US20080127638A1 (en) * 2006-12-01 2008-06-05 Marius Vaarkamp Emission Treatment Systems and Methods
US20090205322A1 (en) * 2006-03-03 2009-08-20 Daimler Ag Exhaust Gas Aftertreatment System and Exhaust Gas Cleaning Method

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4912077A (en) * 1988-07-15 1990-03-27 Corning Incorporated Catalytically active materials and method for their preparation
RU2108140C1 (ru) * 1996-06-24 1998-04-10 Александр Юрьевич Логинов Способ очистки отработавших газов
DK1129764T3 (da) * 2000-03-01 2006-01-23 Umicore Ag & Co Kg Katalysator til rensning af udstödningsgas fra dieselmotorer og fremgangsmåde til dens fremstilling
DE10020100A1 (de) * 2000-04-22 2001-10-31 Dmc2 Degussa Metals Catalysts Verfahren und Katalysator zur Reduktion von Stickoxiden
US6826906B2 (en) * 2000-08-15 2004-12-07 Engelhard Corporation Exhaust system for enhanced reduction of nitrogen oxides and particulates from diesel engines
EP1270886A1 (en) * 2001-06-26 2003-01-02 N.V. Bekaert S.A. Process and device for decreasing the amount of NOx in a diesel exhaust system
ATE355447T1 (de) * 2002-09-13 2006-03-15 Johnson Matthey Plc Selbstzündende brennkraftmaschine und abgassystem hierzu
RU2286201C2 (ru) * 2004-01-20 2006-10-27 Закрытое акционерное общество "ЭКАТ" Способ очистки газовых выбросов и устройство для его осуществления
CN101091916A (zh) * 2006-06-22 2007-12-26 福特环球技术公司 用于柴油微粒过滤器的催化剂组合物
CN101036884A (zh) * 2007-04-19 2007-09-19 德清县三龙催化剂有限公司 一种用于火电厂烟气scr脱硝中的钛基催化剂及制备方法

Patent Citations (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3903020A (en) * 1972-07-14 1975-09-02 Grace W R & Co Stabilized automotive exhaust gas catalyst
US5081095A (en) * 1990-09-10 1992-01-14 General Motors Corporation Method of making a support containing an alumina-ceria washcoat for a noble metal catalyst
US6255249B1 (en) * 1991-11-26 2001-07-03 Engelhard Corporation Oxidation catalyst and method of use
US5431893A (en) * 1992-02-24 1995-07-11 Hug; Hans T. Cleaning exhaust gases from combustion installations
US6823660B2 (en) * 2001-12-13 2004-11-30 Isuzu Motors Limited Exhaust emission purification system for diesel engine
US6892529B2 (en) * 2002-02-25 2005-05-17 Daimlerchrysler Ag Exhaust-gas purification system for an internal combustion engine
US20030167756A1 (en) * 2002-03-07 2003-09-11 Szymkowicz Patrick G. After-treatment system and method for reducing emissions in diesel engine exhaust
US20060107649A1 (en) * 2002-08-26 2006-05-25 Masayuki Kamikawa Apparatus and method for clarifying exhaust gas of diesel engine
US20070089403A1 (en) * 2003-02-26 2007-04-26 Umicore Ag & Co. Kg Exhaust-gas purification system for the selective catalytic reduction of nitrogen oxides in the lean exhaust gas of internal combustion engines and method of exhaust-gas purification
US20070160508A1 (en) * 2005-12-09 2007-07-12 Mitsubishi Fuso Truck And Bus Corporation Exhaust gas purification device
US20090205322A1 (en) * 2006-03-03 2009-08-20 Daimler Ag Exhaust Gas Aftertreatment System and Exhaust Gas Cleaning Method
US20070277507A1 (en) * 2006-06-06 2007-12-06 Eaton Corporation Enhanced hybrid de-NOx system
US20070289289A1 (en) * 2006-06-16 2007-12-20 Denso Corporation Exhaust emission purifier with additive feeder unit and pressurized air introducer unit
US20080066451A1 (en) * 2006-09-18 2008-03-20 Jay Warner Exhaust treatment packaging apparatus, system, and method
US20080127638A1 (en) * 2006-12-01 2008-06-05 Marius Vaarkamp Emission Treatment Systems and Methods

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9737878B2 (en) 2007-10-15 2017-08-22 SDCmaterials, Inc. Method and system for forming plug and play metal catalysts
US8505280B2 (en) * 2007-10-23 2013-08-13 Peugeot Citroen Automobiles Sa Process for controlling the injection of urea in a selective catalytic reduction system
US20100300076A1 (en) * 2007-10-23 2010-12-02 Pierre Henri Maesse Process For Controlling The Injection Of Urea In A Selective Catalytic Reduction System
US20110283680A1 (en) * 2009-02-20 2011-11-24 Ioannis Gekas Method for purification of exhaust gas from a diesel engine
US8997465B2 (en) * 2009-02-20 2015-04-07 Haldor Topsoe A/S Method for purification of exhaust gas from a diesel engine
WO2011100809A1 (en) 2010-02-19 2011-08-25 Vladko Todorov Panayotov Method for removing harmful emission from exhaust gases
US20110239624A1 (en) * 2010-04-06 2011-10-06 Gm Global Technology Operations, Inc. Apparatus and method for regenerating an exhaust filter
US8763369B2 (en) * 2010-04-06 2014-07-01 GM Global Technology Operations LLC Apparatus and method for regenerating an exhaust filter
US8987161B2 (en) 2010-08-13 2015-03-24 Ut-Battelle, Llc Zeolite-based SCR catalysts and their use in diesel engine emission treatment
US9403156B2 (en) 2010-08-13 2016-08-02 Ut-Battelle, Llc Zeolite-based SCR catalysts and their use in diesel engine emission treatment
CN102000507A (zh) * 2010-11-05 2011-04-06 中国石油大学(北京) 用于柴油车尾气处理的还原气注入及四效催化净化系统
WO2013104633A1 (en) 2012-01-09 2013-07-18 Eminox Limited Exhaust system and method for reducing particulate and no2 emissions
US9616384B2 (en) 2014-06-11 2017-04-11 Basf Se Base metal catalyst
GB2552072A (en) * 2016-05-31 2018-01-10 Johnson Matthey Plc Vanadium catalysts for high engine-out NO2 systems
US11643962B2 (en) 2016-08-19 2023-05-09 Kohler Co. System and method for low CO emission engine
US11149617B2 (en) * 2016-08-19 2021-10-19 Kohler Co. System and method for low CO emission engine
US11280240B2 (en) 2018-03-29 2022-03-22 Johnson Matthey Public Limited Company Exhaust system including SCRF catalyst with oxidation zone
WO2019186485A1 (en) * 2018-03-29 2019-10-03 Johnson Matthey Public Limited Company Exhaust system including scrf catalyst with oxidation zone
US11541379B2 (en) * 2018-08-31 2023-01-03 Johnson Matthey Public Limited Company Bimetallic Cu/Mn catalysts for selective catalytic reduction
WO2020221682A1 (en) * 2019-04-29 2020-11-05 Basf Corporation Exhaust gas treatment system for ultra low nox and cold start
JP2022530639A (ja) * 2019-04-29 2022-06-30 ビーエーエスエフ コーポレーション 超低ＮＯｘとコールドスタートのための排気ガス処理システム
US20220203336A1 (en) * 2019-04-29 2022-06-30 Basf Corporation Exhaust gas treatment system for ultra low nox and cold start
US11779906B2 (en) * 2019-04-29 2023-10-10 Basf Corporation Exhaust gas treatment system for ultra low NOx and cold start
JP2024164024A (ja) * 2019-04-29 2024-11-26 ビーエーエスエフ コーポレーション 超低ＮＯｘとコールドスタートのための排気ガス処理システム
JP7603203B2 (ja) 2019-04-29 2024-12-20 ビーエーエスエフ モバイル エミッションズ カタリスツ エルエルシー 超低ＮＯｘとコールドスタートのための排気ガス処理システム
US11338272B2 (en) * 2019-10-18 2022-05-24 Daeyoung C&E Catalyst capable of directly decomposing urea and method for urea decomposition using the same
CN114592958A (zh) * 2021-02-09 2022-06-07 长城汽车股份有限公司 燃油发动机尾气后处理系统及方法

Also Published As

Publication number Publication date
CN101564646B (zh) 2012-11-14
EP2112341A3 (en) 2010-02-17
RU2009114864A (ru) 2010-10-27
EP2112341B1 (en) 2018-07-11
CN101564646A (zh) 2009-10-28
EP2112341A2 (en) 2009-10-28
RU2517714C2 (ru) 2014-05-27

Similar Documents

Publication Publication Date Title
EP2112341B1 (en) Method for purification of an exhaust gas from a diesel engine
KR101699923B1 (ko) 디젤 엔진으로부터 배기 가스의 정화방법
KR101875228B1 (ko) Ｕｒｅａ-ｓｃｒ 시스템 장치 및 제어방법
US8904760B2 (en) Exhaust gas treatment system including an HC-SCR and two-way catalyst and method of using the same
US20150023853A1 (en) Method for reducing nitrogen oxides in diesel-engine exhaust gases and exhaust gas aftertreatment system for carrying out the method
US20110120093A1 (en) Process and apparatus for purifying exhaust gases from an internal combustion engine
CN102454453B (zh) 具有降低的so3产生和改进的耐久性的排放scr nox后处理系统
US8506892B2 (en) Exhaust gas purifying device for diesel engine
CN207363741U (zh) 用于柴油发动机的排气后处理系统
KR20100106477A (ko) 조건에 따라 이산화질소를 제공하기 위한 온도제어식 프리캐탈리스트를 사용하는 디젤기관 배기가스의 질소 산화물 제거
RU2556480C2 (ru) Улучшенное снижение выбросов
US20100300078A1 (en) Exhaust After Treatment System
JP2011047395A (ja) 排気システム
JP2004138022A (ja) ディーゼル排ガスの処理方法および装置
JP4582806B2 (ja) 排ガス浄化装置
US9708949B2 (en) Exhaust aftertreatment system for a compression-ignition engine
KR101091633B1 (ko) 질소 산화물 저감 촉매 및 이를 이용한 배기 장치
JPH05171921A (ja) 排気ガス浄化装置
WO2008143432A1 (en) Purifying device for exhaust gas of internal combustion engine

Legal Events

Date Code Title Description
AS Assignment

Owner name: HALDOR TOPSOE A/S, DENMARK

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:GEKAS, IOANNIS;JOHANSEN, KELD;REEL/FRAME:022534/0235

Effective date: 20090402

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION