EP2931405A1 - Système catalyseur de traitement des gaz d'échappement diesel contenant du nox et des particules - Google Patents

Système catalyseur de traitement des gaz d'échappement diesel contenant du nox et des particules

Info

Publication number
EP2931405A1
EP2931405A1 EP13789490.3A EP13789490A EP2931405A1 EP 2931405 A1 EP2931405 A1 EP 2931405A1 EP 13789490 A EP13789490 A EP 13789490A EP 2931405 A1 EP2931405 A1 EP 2931405A1
Authority
EP
European Patent Office
Prior art keywords
nitrogen oxide
catalyst system
oxide storage
catalyst
particulate filter
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.)
Withdrawn
Application number
EP13789490.3A
Other languages
German (de)
English (en)
Inventor
Michael Schiffer
Ulrich Goebel
Franz Dornhaus
Anke Schuler
Ruediger Hoyer
Marcus Pfeifer
Gerald Jeske
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.)
Umicore AG and Co KG
Original Assignee
Umicore AG and Co KG
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 Umicore AG and Co KG filed Critical Umicore AG and Co KG
Priority to EP13789490.3A priority Critical patent/EP2931405A1/fr
Publication of EP2931405A1 publication Critical patent/EP2931405A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9404—Removing only nitrogen compounds
    • B01D53/9409—Nitrogen oxides
    • B01D53/9431—Processes characterised by a specific device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
    • B01J21/02—Boron or aluminium; Oxides or hydroxides thereof
    • B01J21/04—Alumina
    • 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
    • B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
    • B01J23/44—Palladium
    • 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
    • B01J23/46—Ruthenium, rhodium, osmium or iridium
    • B01J23/464—Rhodium
    • 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
    • B01J29/08—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y
    • B01J29/10—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the faujasite type, e.g. type X or Y containing iron group metals, noble metals or copper
    • B01J29/12—Noble metals
    • B01J29/126—Y-type faujasite
    • 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
    • B01J29/18—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the mordenite type
    • B01J29/20—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the mordenite type containing iron group metals, noble metals or copper
    • B01J29/22—Noble metals
    • 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
    • B01J29/40—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively
    • B01J29/42—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of the pentasil type, e.g. types ZSM-5, ZSM-8 or ZSM-11, as exemplified by patent documents US3702886, GB1334243 and US3709979, respectively containing iron group metals, noble metals or copper
    • B01J29/44—Noble metals
    • 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
    • B01J29/70—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65
    • B01J29/72—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof of types characterised by their specific structure not provided for in groups B01J29/08 - B01J29/65 containing iron group metals, noble metals or copper
    • B01J29/74—Noble metals
    • B01J29/7415—Zeolite Beta
    • 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
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/19—Catalysts containing parts with different compositions
    • 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
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
    • B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
    • 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
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/02—Impregnation, coating or precipitation
    • B01J37/024—Multiple impregnation or coating
    • B01J37/0246—Coatings comprising a zeolite
    • 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
    • B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
    • B01J37/02—Impregnation, coating or precipitation
    • B01J37/024—Multiple impregnation or coating
    • B01J37/0248—Coatings comprising impregnated particles
    • 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
    • F01N3/0814—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with catalytic converters, e.g. NOx absorption/storage reduction catalysts
    • 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
    • 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
    • B01D2255/102—Platinum group metals
    • B01D2255/1025—Rhodium
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/20—Metals or compounds thereof
    • B01D2255/206—Rare earth metals
    • B01D2255/2063—Lanthanum
    • 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
    • B01D2255/40—Mixed oxides
    • B01D2255/402—Perovskites
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D2255/00—Catalysts
    • B01D2255/50—Zeolites
    • B01D2255/502—Beta 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
    • B01D2255/91—NOx-storage component incorporated in the catalyst
    • 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 present invention relates to a catalyst system for the treatment of diesel exhaust gas, which comprises in the flow direction of the exhaust gas, a nitrogen oxide storage catalyst and a diesel particulate filter, both components having catalytically active noble metals.
  • the exhaust gas of diesel-powered vehicles also contains components resulting from incomplete combustion of the fuel in the combustion chamber of the cylinder.
  • HC residual hydrocarbons
  • these include particulate emissions, also referred to as “diesel soot” or “soot particles”.
  • Diesel soot particulate emissions
  • These are complex agglomerates of predominantly carbon-containing solid particles and an adherent liquid phase, which mostly consists of relatively long-chain hydrocarbon condensates.
  • the liquid phase adhering to the solid components is also referred to as "Soluble Organic Fraction SOP" or "Volatile Organic Fraction VOR”.
  • Particulate filters are used to remove particulate emissions from the exhaust gas of diesel vehicles.
  • Particulate filters are usually wall flow filter substrates, ie honeycomb bodies with mutually gas-tight closed inlet and outlet channels, which are bounded by porous walls and separated from each other.
  • the particle-containing exhaust gas flowing into the inflow channels is forced to pass through the porous wall by a gas-tight sealing plug located on the outlet side and exits from the wall flow filter substrate again from the outflow channels closed on the inflow side. This diesel soot is filtered out of the exhaust.
  • the filter may be coated with a catalyst layer capable of lowering the soot ignition temperature.
  • Particulate filters provided with a catalyst layer are also referred to as cDPF (catalyzed diesel particulate filter) and are described, for example, in SAE publication SAE 2005-01-1756.
  • nitrogen oxide storage catalysts for which the term "lean NOx trap" or LNT has become commonplace In the subsequent rich operating phase of the engine, they are stored in the form of nitrates and the resulting nitrogen oxides are converted with the reducing exhaust gas components on the storage catalytic converter to form nitrogen, carbon dioxide and water This method of operation is described, for example, in SAE Specification SAE 950809.
  • Suitable storage materials are, in particular, oxides, carbonates or hydroxides of magnesium, calcium, strontium, barium, the alkali metals, the rare earth metals or mixtures thereof. These connections Because of their basic properties, they are able to form nitrates with the acid nitrogen oxides of the exhaust gas and store them in this way. They are deposited to produce a large interaction surface with the exhaust gas in the highest possible dispersion on suitable carrier materials.
  • nitrogen oxide storage catalysts generally contain noble metals such as platinum, palladium and / or rhodium as catalytically active components. Their task is on the one hand to oxidize NO to N0 2 under lean conditions, as well as CO and HC to C0 2 and on the other hand during the rich operating phases in which the nitrogen oxide storage catalyst is regenerated to reduce released N0 2 to nitrogen.
  • SCR Selective Catalytic Reduction
  • ammonia used as the reducing agent can be generated as a secondary emission in the exhaust system or it is made available by metering a precursor compound from which ammonia can be formed, such as urea, ammonium carbamate or ammonium formate into the exhaust line and subsequent hydrolysis.
  • a source for providing the reducing agent an injection device for the demand-based metering of the reducing agent into the exhaust gas and an SCR catalytic converter arranged in the flow path of the exhaust gas are necessary.
  • the nitrogen oxide storage catalyst is designed so that it stores nitrogen oxide under lean conditions at temperatures of 300 ° C to 550 ° C.
  • a disadvantage of this system is the space required with the use of two nitrogen oxide storage catalysts, which is not available in many cases. Incidentally, the use of two nitrogen oxide storage catalysts is not optimal for economic reasons.
  • US 2010/236224 describes a system which may comprise a nitrogen oxide storage catalyst and a particle filter in the flow direction of the exhaust gas.
  • the system is characterized in particular in that, downstream of the nitrogen oxide storage catalytic converter, it has a device for metering air into the exhaust gas stream for reducing hydrocarbons.
  • a diesel particulate filter containing noble metal selected from the group consisting of platinum, palladium and platinum and palladium,
  • the noble metal loading of the nitrogen oxide storage catalyst is 100 to 180 g / ft 3 (3.53 to 6.36 g / l) and the noble metal loading of the diesel particulate filter is 5 to 35 g / ft 3 (0.18 to 1, 24 g / l).
  • the noble metal loading of the nitrogen oxide storage catalyst is higher than the noble metal loading of the diesel particulate filter.
  • the data g / ft 3 or g / l respectively denote the amount of the respective component in g per volume of the carrier substrate in ft 3 or I.
  • Nitrogen oxide storage components that can be used in the nitrogen oxide storage catalysts, for example, oxides, hydroxides, oxide hydroxides, carbonates and bicarbonates of the alkali metals, earth ⁇ alkali metals, of lanthanum and the lanthanides (Ce to Lu).
  • oxides, hydroxides, oxide hydroxides, carbonates and bicarbonates of sodium, potassium, strontium, barium and lanthanum Preference is given to oxides, hydroxides, oxide hydroxides, carbonates and bicarbonates of sodium, potassium, strontium, barium and lanthanum.
  • Particularly preferred is the use of oxides, hydroxides, oxide hydroxides and carbonates of strontium and barium, and mixtures thereof.
  • nitrogen oxide storage components oxides, hydroxides, oxide hydroxides, carbonates and / or bicarbonates of the alkali metals or alkaline earth metals in amounts of 15 to 20 g / l, based on the respective oxide.
  • additional components for example cerium oxide.
  • the amount of nitrogen oxide storage components is 150 to 250 g / l, based on the respective oxides.
  • Suitable noble metals for the nitrogen oxide storage catalyst for example, platinum, palladium and / or rhodium into consideration. In particular, it is possible to use platinum or palladium as the sole noble metal or else in a mixture with one another. If platinum and palladium are used, the weight ratio Pt: Pd is in particular 2: 1 to 10: 1.
  • the noble metal loading of the nitrogen oxide storage catalyst is 150 to 180 g / ft 3 (5.30 to 6.36 g / L).
  • Nitrogen oxide storage component and noble metal are usually present on suitable carrier materials.
  • high-surface-area, high-melting oxides are used in particular, for example aluminum oxide, silicon dioxide, titanium dioxide, but also cerium-zirconium mixed oxides and magnesium-aluminum mixed oxides.
  • nitrogen oxide storage component and noble metal can be present together on a carrier material or else on different carrier materials.
  • the nitrogen oxide storage catalyst is present in embodiments of the present invention as a ceramic or metallic flow-through substrate as a supporting body, on which the catalytically active constituents are applied in the form of a coating. Suitable flow substrates are known and available on the market.
  • the total washcoat loading of the nitrogen oxide storage catalyst in embodiments of the present invention is from 250 to 400 g / l.
  • the diesel particulate filter contains as precious metal platinum, palladium or platinum and palladium. In one embodiment of the present invention, it contains only platinum or only palladium.
  • it contains platinum and palladium at a weight ratio Pt: Pd of from 1: 2 to 12: 1, for example 1: 1, 6: 1, 10: 1 and 12: 1.
  • the noble metal loading of the diesel particulate filter is 10 to 25 g / ft 3 (0.35 to 0.88 g / i).
  • the diesel particulate filter contains a zeolite compound, in particular in an amount of 5 to 25 g / l, in particular 10 to 20 g / l come into consideration.
  • Suitable zeolite compounds are thermally stable, large or medium pore zeolite structure types, in particular ⁇ -zeolite, zeolite Y, mordenite and ZSM-5.
  • the diesel particulate filter includes components resulting in an H 2 S barrier function. Suitable components are known to the person skilled in the art and described in the literature.
  • EP 2 275 194 A1 describes an H 2 S barrier function which is achieved by a copper compound, for example copper oxide, and a refractory carrier material, for example a y-aluminum oxide-containing coating.
  • the catalytically active ingredients so in particular precious metal and possibly the zeolite on a carrier material.
  • the materials already mentioned above in connection with the nitrogen oxide storage catalyst come into question.
  • the diesel particulate filter is present in embodiments of the present invention as a ceramic or metallic wall flow filter substrate as a supporting body, on which the catalytically active ingredients are applied in the form of one or more coatings.
  • the catalytically active ingredients are in the porous Walls between the inflow and outflow before. Suitable wall flow filter substrates are known and available on the market.
  • the catalytically active components are in one embodiment of the present invention homogeneously prior to the entire length of the wall flow filter substrate ⁇ distributed.
  • the content of zeolite may be the same or similar in the two zones.
  • the upstream zone has a significantly higher noble metal loading, in particular 60 to 90% of the total noble metal content of the filter coating.
  • the washcoat loading of the diesel particulate filter in embodiments of the present invention is 8 to 40 g / l.
  • the catalyst system according to the invention is outstandingly suitable for the treatment of diesel exhaust gases and can be used with regard to Treatment of NOx, HC, CO and particulate meet the requirements of Euro 6 legislation.
  • the present invention thus also relates to a process for the treatment of diesel exhaust gases, which is characterized in that the diesel exhaust gas is passed through a catalyst system, which in the flow direction of the exhaust gas
  • a diesel particulate filter containing noble metal selected from the group consisting of platinum, palladium and platinum and palladium,
  • the noble metal loading of the nitrogen oxide storage catalyst is 100 to 180 g / ft 3 (3.53 to 6.36 g / l) and the noble metal loading of the diesel particulate filter is 5 to 35 g / ft 3 (0.18 to 1.24 g / l) amounts to.
  • the nitrogen oxide storage catalytic converter assumes the function of NOx and CO conversion in the lean / rich exhaust gas, while the diesel particulate filter is responsible exclusively for the conversion of HC and residual CO traces and for particle filtration and regeneration. This is achieved in particular by the fact that the noble metal contained in the catalyst system is optimally distributed to nitrogen oxide storage catalyst and diesel particulate filter.
  • Embodiments of the method according to the invention correspond to the above-described embodiments of the catalyst system according to the invention.
  • Inlet side zone 100 g / ft 3 of platinum and palladium in a weight ratio of 2: 1 on a lanthanum stabilized alumina and 9 g / l of a commercially available beta zeolite on one third the length of the filter substrate.
  • Downstream zone 10 g / cft of platinum and palladium in a weight ratio of 2: 1 on a lanthanum stabilized alumina and 10 g / l of a commercially available beta zeolite on the remaining two thirds of the length of the filter substrate.
  • Inlet side zone 55 g / ft 3 of platinum and palladium in the weight ratio 1: 1 on a lanthanum stabilized alumina and 9 g / l of a commercially available beta zeolite on one third the length of the filter substrate.
  • Downstream zone 10 g / ft 3 of platinum and palladium in a weight ratio of 1: 1 on a lanthanum stabilized alumina and 10 g / l of a commercially available zeolites beta on the remaining two-thirds of the length of the filter substrate.
  • Inlet side zone 40 g / ft 3 platinum and palladium in a weight ratio of 2: 1 on a lanthanum stabilized alumina and 9 g / l of a commercially available beta zeolite on one third the length of the filter substrate.
  • Downstream zone 10 g / ft 3 of platinum and palladium in weight ratio 2: 1 on a lanthanum stabilized alumina and 10 g / l of a commercially available beta zeolite on the remaining two-thirds of the length of the filter substrate.
  • the catalyst system thus obtained is characterized by properties which are comparable to those of the catalyst system of Example 1.

Landscapes

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

Abstract

La présente invention concerne un système catalyseur pour le traitement des gaz d'échappement diesel, qui comprend, dans la direction d'écoulement des gaz d'échappement, un catalyseur accumulateur de NOx qui contient un composant accumulateur de NOx ainsi qu'un métal noble, et un filtre à particules diesel , qui contient un métal noble choisi dans la série platine, palladium et platine, et palladium, ledit système catalyseur étant caractérisé en ce que la charge de métal noble du catalyseur accumulateur de NOx est de 100 à180 g/ft3 (3,53 bis 6,36 g/l) et la charge de métal noble du filtre à particules diesel est de 5 à 35 g/ft3 (0,18 bis 1,24 g/l).
EP13789490.3A 2012-11-12 2013-11-08 Système catalyseur de traitement des gaz d'échappement diesel contenant du nox et des particules Withdrawn EP2931405A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP13789490.3A EP2931405A1 (fr) 2012-11-12 2013-11-08 Système catalyseur de traitement des gaz d'échappement diesel contenant du nox et des particules

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP12192178 2012-11-12
EP13789490.3A EP2931405A1 (fr) 2012-11-12 2013-11-08 Système catalyseur de traitement des gaz d'échappement diesel contenant du nox et des particules
PCT/EP2013/003374 WO2014072067A1 (fr) 2012-11-12 2013-11-08 Système catalyseur de traitement des gaz d'échappement diesel contenant du nox et des particules

Publications (1)

Publication Number Publication Date
EP2931405A1 true EP2931405A1 (fr) 2015-10-21

Family

ID=47227536

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13789490.3A Withdrawn EP2931405A1 (fr) 2012-11-12 2013-11-08 Système catalyseur de traitement des gaz d'échappement diesel contenant du nox et des particules

Country Status (7)

Country Link
US (1) US9527036B2 (fr)
EP (1) EP2931405A1 (fr)
JP (1) JP6285945B2 (fr)
KR (1) KR102088152B1 (fr)
CN (1) CN104780997A (fr)
DE (1) DE202013011730U1 (fr)
WO (1) WO2014072067A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9333490B2 (en) * 2013-03-14 2016-05-10 Basf Corporation Zoned catalyst for diesel applications
US9981251B2 (en) * 2014-06-16 2018-05-29 Umicore Ag & Co. Kg Exhaust gas treatment system
BR112017002568B1 (pt) * 2014-08-12 2022-02-08 Johnson Matthey Public Limited Company Sistema de escape, e, método para tratar um gás de escape
RU2018101292A (ru) 2015-06-16 2019-07-16 Басф Се Scr-катализированный сажевый фильтр с интегрированным катализатором-ловушкой оксидов азота в условиях обедненной смеси для применения в пассивном селективном каталитическом восстановлении
RU2018141886A (ru) * 2016-04-29 2020-05-29 Джонсон Мэтти Паблик Лимитед Компани Выхлопная система
DE102016207484A1 (de) * 2016-05-02 2017-11-02 Umicore Ag & Co. Kg Dieseloxidationskatalysator
WO2018020049A1 (fr) * 2016-07-29 2018-02-01 Umicore Ag & Co. Kg Catalyseur de réduction des oxydes d'azote
DE102016121509B4 (de) 2016-11-10 2021-09-16 Volkswagen Aktiengesellschaft Vorrichtung und Verfahren zur Abgasnachbehandlung eines Verbrennungsmotors
WO2019134958A1 (fr) * 2018-01-05 2019-07-11 Umicore Ag & Co. Kg Adsorbeur d'oxyde d'azote passif
CN108404975B (zh) * 2018-04-27 2021-03-23 中自环保科技股份有限公司 一种具有良好低温起燃性能的氧化型催化***及其制备工艺
KR20210041551A (ko) 2018-06-12 2021-04-15 바스프 코포레이션 연료 차단 NOx 제어용 TWC 시스템

Family Cites Families (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6471924B1 (en) 1995-07-12 2002-10-29 Engelhard Corporation Method and apparatus for NOx abatement in lean gaseous streams
JP3899534B2 (ja) 1995-08-14 2007-03-28 トヨタ自動車株式会社 ディーゼル機関の排気浄化方法
GB9919013D0 (en) 1999-08-13 1999-10-13 Johnson Matthey Plc Reactor
JP3628277B2 (ja) * 2001-05-25 2005-03-09 日野自動車株式会社 エンジンの排ガス浄化装置
US6971337B2 (en) * 2002-10-16 2005-12-06 Ethyl Corporation Emissions control system for diesel fuel combustion after treatment system
DE10308287B4 (de) * 2003-02-26 2006-11-30 Umicore Ag & Co. Kg Verfahren zur Abgasreinigung
GB0305415D0 (en) 2003-03-08 2003-04-16 Johnson Matthey Plc Exhaust system for lean burn IC engine including particulate filter and NOx absorbent
WO2005090760A1 (fr) * 2004-03-24 2005-09-29 Hitachi, Ltd. Dispositif de clarification de gaz d'echappement derive de moteur a combustion interne, procede de clarification de gaz d'echappement, et agent de capture de constituant de soufre pour moteur a combustion interne
JP2007098274A (ja) 2005-10-04 2007-04-19 Ibiden Co Ltd 多孔質ハニカム構造体及びそれを利用した排ガス浄化装置
US7063642B1 (en) 2005-10-07 2006-06-20 Eaton Corporation Narrow speed range diesel-powered engine system w/ aftertreatment devices
JP2007192055A (ja) * 2006-01-17 2007-08-02 Toyota Motor Corp 排ガス浄化装置と排ガス浄化方法
US7771669B2 (en) 2006-03-20 2010-08-10 Ford Global Technologies, Llc Soot oxidation catalyst and method of making
US20080127638A1 (en) 2006-12-01 2008-06-05 Marius Vaarkamp Emission Treatment Systems and Methods
JP2008151100A (ja) * 2006-12-20 2008-07-03 Toyota Motor Corp 排ガス浄化装置
JP2010513788A (ja) 2006-12-21 2010-04-30 ジョンソン、マッセイ、パブリック、リミテッド、カンパニー リーンバーンｉｃ内燃機関を備えた装置、及びそのための排気システム
EP1961933B1 (fr) * 2007-02-23 2010-04-14 Umicore AG & Co. KG Filtre à particule de diesel activé de manière catalytique et doté d'une action de blocage à l'ammoniac
US20090155525A1 (en) * 2007-12-18 2009-06-18 Yuejin Li Passivation-Free Coating Process For A CSF
US20090173063A1 (en) 2008-01-07 2009-07-09 Boorse R Samuel Mitigation of Particulates and NOx in Engine Exhaust
WO2010108083A1 (fr) * 2009-03-20 2010-09-23 Basf Catalysts Llc Système de traitement d'émissions avec piège de nox pauvre
US8904760B2 (en) * 2009-06-17 2014-12-09 GM Global Technology Operations LLC Exhaust gas treatment system including an HC-SCR and two-way catalyst and method of using the same
DE102009033635B4 (de) * 2009-07-17 2020-11-05 Umicore Ag & Co. Kg Katalytisch aktives Partikelfilter mit Schwefelwasserstoff-Sperrfunktion, seine Verwendung und Verfahren zur Entfernung von Stickoxiden und Partikeln
GB2481057A (en) 2010-06-11 2011-12-14 Johnson Matthey Plc Exhaust system comprising a catalyst with a downstream filter and SCR catalyst
WO2012079598A1 (fr) 2010-12-14 2012-06-21 Umicore Ag & Co. Kg Catalyseur d'oxydation diesel de structure pour générateur de no2 perfectionné
EP2481473A3 (fr) 2011-01-26 2012-08-15 Ford Global Technologies, LLC Catalyseurs LNT et SCR pour applications combinées LNT-SCR

Also Published As

Publication number Publication date
CN104780997A (zh) 2015-07-15
JP2016502460A (ja) 2016-01-28
WO2014072067A1 (fr) 2014-05-15
US9527036B2 (en) 2016-12-27
JP6285945B2 (ja) 2018-02-28
KR102088152B1 (ko) 2020-03-12
KR20150079986A (ko) 2015-07-08
US20150273394A1 (en) 2015-10-01
DE202013011730U1 (de) 2014-04-03

Similar Documents

Publication Publication Date Title
WO2014072067A1 (fr) Système catalyseur de traitement des gaz d'échappement diesel contenant du nox et des particules
EP3576865B1 (fr) Catalyseur pour la purification des effluents gazeux d'un moteur diesel
EP1961933B1 (fr) Filtre à particule de diesel activé de manière catalytique et doté d'une action de blocage à l'ammoniac
EP2123345B1 (fr) Dispositif de nettoyage de gaz d'échappement diesel
EP2349537A1 (fr) Réduction de particules avec un catalyseur combiné scr et contre les dégagements de nh3
EP2674584B1 (fr) Procédé de prévention de la contamination d'un catalyseur SCR avec platine
DE102008009672B4 (de) SCR-Katalysator mit Kohlenwasserstoffspeicherfunktion, dessen Verwendung und Abgasreinigungssystem und dessen Verwendung
DE102012222807A1 (de) Abgassystem für einen mager verbrennenden Verbrennungsmotor, das einen SCR-Katalysator umfasst
EP2653681B2 (fr) Utilisation d' un filtre à particules diésel revêtu pour éviter la contamination d' un catalysateur SCR
EP3442687A1 (fr) Filtre à particules pourvu d'un revêtement à effet scr
DE102010021589A1 (de) Abgasnachbehandlungssystem
EP3623047B1 (fr) Catalyseur de réduction d'oxydes d'azote
WO2020169600A1 (fr) Catalyseur de réduction des oxydes d'azote
EP3490693B1 (fr) Catalyseur pour la réduction d'oxydes d'azote
EP3389860B1 (fr) Procédé de protection d'un catalyseur à réduction catalytique sélective (scr) contre la contamination par palladium
EP3487617A1 (fr) Catalyseur d'oxydation diesel
EP2656904A1 (fr) Catalyseur d'oxydation diesel
EP3843896B1 (fr) Catalyseur de stockage d'oxydes d'azote
EP3449999A1 (fr) Adsorbant passif d'hémioxyde d'azote
EP3459617B1 (fr) Filtre à particules pourvu de fonctions catalytiques intégrées
EP3450016A1 (fr) Adsorbant passif d'oxyde d'azote à base de palladium et zéolithe pour le traitement de gaz d'échappement
DE10115485A1 (de) Partikelfilter

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: REQUEST FOR EXAMINATION WAS MADE

17P Request for examination filed

Effective date: 20150612

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

AX Request for extension of the european patent

Extension state: BA ME

DAX Request for extension of the european patent (deleted)
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

17Q First examination report despatched

Effective date: 20210409

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20210820