EP1251249B2 - Verfahren und Vorrichtung zum Entfernen von Russpartikeln aus dem Abgas eines Dieselmotors - Google Patents

Verfahren und Vorrichtung zum Entfernen von Russpartikeln aus dem Abgas eines Dieselmotors Download PDF

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Publication number
EP1251249B2
EP1251249B2 EP02008253A EP02008253A EP1251249B2 EP 1251249 B2 EP1251249 B2 EP 1251249B2 EP 02008253 A EP02008253 A EP 02008253A EP 02008253 A EP02008253 A EP 02008253A EP 1251249 B2 EP1251249 B2 EP 1251249B2
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EP
European Patent Office
Prior art keywords
filter
exhaust gas
deep
soot
particle filter
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Expired - Lifetime
Application number
EP02008253A
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English (en)
French (fr)
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EP1251249A2 (de
EP1251249A3 (de
EP1251249B1 (de
Inventor
Marcus Dr. Pfeifer
Harald Krieg
Barry Dr. Van Setten
Roger Staab
Jürgen Dr. Gieshoff
Egbert Dr. Lox
Thomas Dr. Kreuzer
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Umicore AG and Co KG
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Umicore AG and Co KG
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Priority claimed from EP01109571A external-priority patent/EP1251248A1/de
Application filed by Umicore AG and Co KG filed Critical Umicore AG and Co KG
Priority to EP02008253A priority Critical patent/EP1251249B2/de
Publication of EP1251249A2 publication Critical patent/EP1251249A2/de
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    • 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
    • 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
    • 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
    • F01N13/0093—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 the purifying devices are of the same type
    • 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]

Definitions

  • the invention provides a process and a device for removing soot particles from the exhaust gas from a diesel engine.
  • diesel engines do not have the capability to reduce both nitrogen oxides and soot emissions simultaneously.
  • design steps are taken to lower the amount of one of the harmful components mentioned in diesel engines, the amount of the other harmful component is simultaneously raised.
  • soot emissions are lowered by increasing the combustion temperatures in a diesel engine, increased production of nitrogen oxides then takes place.
  • nitrogen oxide emissions are reduced, for example by recycling the exhaust gas, soot emissions increase.
  • filters in particular wall-flow filters, are currently used to filter out the soot particles contained in the exhaust gas.
  • degrees of filtering of more than 95 % are obtained, so an efficient reduction in soot emissions in the exhaust gas from diesel engines is ensured.
  • these types of filters become clogged due to the continuous deposition of soot particles. Therefore, the filters have to be regenerated by combustion of the soot particles.
  • regeneration of the filter can be achieved by thermal processes.
  • the soot particles are then burnt with the aid of the oxygen present in the exhaust gas.
  • the disadvantage with this, however, is that temperatures in the range 550 °C to 600 °C are required for these types of combustion processes.
  • catalytic processes for regenerating filters are used instead of thermal processes.
  • the exhaust gas from a diesel engine is passed over a catalyst, in a first process step, without being filtered.
  • the catalyst which preferably comprises a platinum group metal located on a honeycomb monolith
  • the nitrogen monoxide present in the exhaust gas is converted to nitrogen dioxide.
  • a filter for filtering soot particles from the exhaust gas is arranged downstream of the catalyst. Nitrogen dioxide produced in the catalyst is used to regenerate the filter, in order to burn soot particles deposited on the filter at a temperature of less than 400 °C.
  • the problem with this process is that amounts of nitrogen dioxide sufficient for complete regeneration of the filter are required.
  • Some modem diesel engines which have exhaust gas recycling systems, are optimized with regard to the emissions of nitrogen oxides so the amounts of nitrogen dioxide present in the exhaust gas is not sufficient for complete regeneration of the filter. Typically, combustion of only 50 % to 70 % of the soot particles is achieved with these types of diesel engines.
  • an apparatus for eliminating soot particles from the exhaust gas stream of a diesel engine be comprised of a plurality of diesel particle filters arranged in series with each other and a plurality of oxidation catalysts arranged upstream of each particle filter.
  • the multiple arrangement of oxidation catalyst and particle filter allows for the multiple oxidation of nitrogen monoxide to nitrogen dioxide and subsequent reduction to nitrogen monoxide again in the downstream filter while burning the collected soot at the same time.
  • an apparatus comprising four oxidation catalysts and four particle filters whereby the pore diameter of each downstream filter is smaller than that of the neighboured upstream filter.
  • the apparatus is terminated by a wall flow filter with high degree of filtration.
  • the treatment units can be made in such a way that the relevant filter and the associated catalyst form an integral component.
  • This type of component can be formed in particular from a filter, in particular a deep-bed particle filter, which is coated with the relevant catalyst.
  • EP-A-1 055 805 discloses a process for removing soot from the exhaust gas of a diesel engine by oxidizing the nitrogen monoxide present in the exhaust gas to nitrogen dioxide, separating the soot from the exhaust gas stream and oxidizing the soot using the nitrogen dioxide produced.
  • the present invention provides a process as defined in claim 1 and a device as defined in claim 3.
  • the present invention includes a deep-bed particle filter.
  • a deep-bed particle filter is a filtering device which collects the soot particles within the whole volume of the filter. It may include ceramic fibres, ceramic foams, wire meshes or similar structures.
  • a deep-bed particle filter comprises a large pore material which removes the soot particles from the exhaust gas mainly by inertia and/or diffusion effects. Contrary to deep-bed particle filters the so-called wall-flow filters collect the soot particles on the surface of the filter material.
  • nitrogen monoxide is oxidized to nitrogen dioxide.
  • Nitrogen dioxide burns the soot particles deposited on the filter and gets reduced back to nitrogen monoxide which is then again oxidized to nitrogen dioxide and so forth.
  • nitrogen monoxide is continuously recycled while flowing through the deep-bed particle filter.
  • One such cycle will be called catalytic cycle in the following. Due to this recycling of nitrogen monoxide a relatively low concentration of nitrogen monoxide in the exhaust gas is sufficient for continuous combustion of all soot particles collected within the deep-bed particle filter.
  • a second particle filter with a filtration efficiency of more than 95 % is placed behind the deep-bed particle filter and performs the function of a so-called soot barrier.
  • the filtration efficiency of a particle filter is understood to be the ratio of the particle mass collected by the filter with respect to the total particle mass carried into the filter by the exhaust gas. Deep-bed particle filter tend to reentrainement of the collected soot particles into the exhaust gas stream at sudden pressure changes.
  • the soot barrier is intended to prevent sudden soot emissions at the occasion of pressure changes in the exhaust gas.
  • the deep-bed particle filter and the catalyst which is preferably applied to the deep-bed particle filter as a catalytic coating, can be tuned to one another in such a way that the described catalytic cycles prevent the filter from getting blocked by soot.
  • the filtration efficiency of the deep-bed particle filter has a value between 10 and 95 %, preferably between 50 and 80 %.
  • the number of catalytic cycles proceeding depends in particular by the process temperatures.
  • a minimum exhaust gas temperature of 200 °C is necessary.
  • the temperature in the region of the deep-bed particle filter lies between 350 and 450 °C.
  • soot particles present in the exhaust gas Due to the combined filter effect and continuous regeneration process, most of the soot particles present in the exhaust gas are eliminated within the deep-bed particle filter.
  • the residual soot particles present at the exit from the deep-bed particle filter are collected on the soot barrier which is located after the deep-bed particle filter and is formed, for example, by a wall-flow filter or a sintered metal plate.
  • the residual soot particles deposited on the soot barrier are also continuously removed, preferably with the aid of the nitrogen dioxide produced in the deep-bed particle filter.
  • the examples are working example of the device according to the invention for removing soot particles from the exhaust gas from a diesel engine.
  • Figure 1 shows a working example of the device according to the invention for removing soot particles from the exhaust gas from a diesel engine.
  • the device has a deep-bed particle filter 1 with a catalyst, wherein the catalyst is applied to deep-bed particle filter 1 as catalytically active coating 2.
  • the catalyst may also form the filter material in deep-bed particle filter 1 itself.
  • the device also has a soot barrier 3.
  • Soot barrier 3 is located in the exhaust gas stream of the diesel engine, marked with an arrow, downstream of deep-bed particle filter 1.
  • soot barrier 3 consists of a wall-flow filter.
  • Deep-bed particle filter 1 comprises ceramic fibres, expanded ceramic material, wire mesh or the like.
  • deep-bed particle filter 1 comprises a coarse-pored filter material in which soot particles from the exhaust gas stream are deposited, mainly due to inertia effects and/or diffusion effects.
  • Catalytic coating 2 is applied over the entire length of deep-bed particle filter 1.
  • at least localized catalytic coating structures may also be provided at the inlet and outlet faces of deep-bed particle filter 1.
  • the cross-section of deep-bed particle filter 1 is fitted to the cross-section of the downstream wall-flow filter so that the entire exhaust gas stream at the outlet from deep-bed particle filter 1 is supplied to the wall-flow filter.
  • the wall-flow filter may also be mounted on the outlet face of deep-bed particle filter 1.
  • Catalytic coating 2 contains platinum. Furthermore, catalytic coating 2 contains at least one oxidic support material, in the present case aluminium oxide, onto which the noble metal is deposited.
  • the catalyst in catalytic coating 2 can expediently contain an active substance which supports the oxidation of soot particles by decreasing the soot ignition temperature. Cerium oxide and/or zirconium oxide and/or terbium oxide and/or praseodymium oxide in particular can be used as these types of substances. As a result of the catalytic cycle, sufficient nitrogen dioxide is provided to extend to complete oxidation of the deposited soot particles and thus to regeneration of deep-bed particle filter 1.
  • soot barrier 3 Due to the filter effect of deep-bed particle filter 1, it is also ensured that the majority of the soot particles are filtered out of the exhaust gas stream. The remaining residual soot particles are deposited in soot barrier 3. Continuous oxidation of the deposited soot particles also takes place in soot barrier 3, wherein excess nitrogen dioxide generated in deep-bed particle filter 1 is preferably used for this purpose.
  • Figure 2 shows a second working example of the device for removing soot particles from the exhaust gas from a diesel engine.
  • the device, and in particular deep-bed particle filter 1 in this case has substantially the shape of a hollow cylinder.
  • the direction of flow of the exhaust gas stream in figure 2 is again represented by arrows.
  • the external casing surface of the hollow cylinder forms the inflow face of deep-bed particle filter 1, via which the exhaust gas is supplied to deep-bed particle filter 1.
  • the exhaust gas stream is discharged via the central discharge channel running in the longitudinal direction of the hollow cylinder.
  • the filter material in deep-bed particle filter 1 preferably corresponds to the filter material in accordance with the working example shown in figure 1 .
  • the catalyst material in the catalytic coating 2 applied to deep-bed particle filter 1 also corresponds to that in the working example shown in figure 1 .
  • the deep-bed particle filter 1 in accordance with figure 2 consists of an arrangement of several identically designed filter elements 4.
  • Filter elements 4 are designed to be substantially circular in shape and run round in the direction of the periphery of the hollow cylinder. Filter elements 4 follow closely after each other in the longitudinal direction of the hollow cylinder so that the rear faces of filter elements 4 form a closed surface which forms the external surface of the hollow cylinder and thus the inflow face of deep-bed particle filter 1.
  • the individual filter elements 4 contain the catalyst which is distributed over the entire volume of each filter element 4.
  • Each filter element 4 has a triangular cross-section.
  • a sintered metal plate is applied, as soot barrier 3, to the side faces of each filter element 4, thus forming sharp angled elements projecting into the discharge channel.
  • the exhaust gas is supplied via the inflow faces of deep-bed particle filter 1 of the individual filter elements 4.
  • the catalyst in filter element 4 is used, in the same way as in the working example shown in figure 1 , to oxidize the nitrogen monoxide contained in the exhaust gas.
  • a plurality of catalytic cycles for the continuous removal of soot particles from the exhaust gas stream is again established within filter elements 4.
  • soot barrier 3 The deposition of residual soot particles again takes place in soot barrier 3. It is particularly advantageous here that the catalyst in filter element 4 is immediately adjacent to soot barrier 3. A large contact area with the catalyst is produced due to the two-dimensional design of soot barrier 3. This ensures that nitrogen dioxide generated in the catalyst is also available in soot barrier 3 in amounts sufficient to oxidize the soot particles.

Claims (8)

  1. Verfahren zur Herstellung von im wesentlichen rußfreiem Abgas eines Dieselmotors, aufweisend Oxidieren von im Abgas enthaltenem Stickstoffmonoxid zu Stickstoffdioxid, Filtern des Rußes aus dem Abgas mit zwei Partikelfiltern, die unterschiedliche Filterraten haben, und Verbrennen der ausgefilterten Rußpartikel mittels des Stickstoffdioxids,
    dadurch gekennzeichnet, daß
    a) das Rußpartikel enthaltende Abgas gefiltert wird, wobei ein Tiefenfilter (1) genutzt wird, um ein anfänglich gefiltertes Abgas zur Verfügung zu stellen, wobei der Tiefenfilter (1) eine Filtervorrichtung ist, die über das gesamte Volumen des Filters Rußpartikel aufnimmt und eine Filterrate zwischen etwa 50% und 80% für Rußpartikel hat und mit einer katalytischen Beschichtung (2) für die Oxidation von Stickstoffmonoxid zu Stickstoffdioxid beschichtet ist, wobei die Beschichtung über seine gesamte Länge aufgebracht ist und Platin enthält;
    b) die Rußpartikel, die der Tiefenfilter (1) aufgenommen hat, kontinuierlich verbrannt werden, wobei Stickstoffdioxid, das durch die katalytische Oxidation von im Abgas enthaltenem Stickstoffmonoxid generiert wird und durch die Verbrennung der Rußpartikel zurück zu Stickstoffmonoxid reduziert wird, verwendet wird, wobei der Prozeß der Oxidation und Reduktion von Stickstoffmonoxid fortlaufend wiederholt wird, während das Abgas den Filter passiert; und
    c) das vom Tiefenfilter (1) kommende, anfänglich gefilterte Abgas von einem zweiten Filter weiter gefiltert wird, wobei der zweite Partikelfilter als Rußsperre (3) dient und aus einem Wandflußfilter oder Metallsinterfilter mit einer Filterrate von mindestens 95% ausgewählt ist, um ein im Wesentlichen rußfreies Abgas herzustellen.
  2. Verfahren nach Anspruch 1,
    dadurch gekennzeichnet, daß
    der Wandflußfilter eine Filterrate von mehr als etwa 98% hat.
  3. Vorrichtung zum Entfernen von Rußpartikeln aus dem Abgas von Dieselmotoren,
    dadurch gekennzeichnet, daß
    sie einen Tiefenfilter (1) mit einer Filterrate zwischen etwa 50% und 80%, wobei der Filter mit einer katalytischen Beschichtung (2) zur Oxidation von Stickstoffmonoxid zu Stickstoffdioxid beschichtet ist, wobei die Beschichtung über seine gesamte Länge aufgebracht ist und Platin enthält, und einen zweiten Partikelfilter ausgewählt aus einem Wandflußfilter oder einem Metallsinterfilter aufweist, der eine Filterrate von mehr als 95% hat, wobei der zweite Partikelfilter stromabwärts vom Tiefenfilter (1) angeordnet ist und eine Rußsperre (3) bildet, und wobei der Tiefenfilter eine Filtervorrichtung ist, die über das gesamte Volumen des Filters Rußpartikel aufnimmt.
  4. Vorrichtung nach Anspruch 3, wobei der Tiefenfilter (1) aus einem Material ausgewählt aus der Gruppe bestehend aus keramischen Fasern, keramischen Schäumen oder Drahtgeflecht gebildet ist.
  5. Vorrichtung nach Anspruch 3, wobei die katalytische Beschichtung (2) mindestens ein oxidisches Trägermaterial für jedes Edelmetall enthält.
  6. Vorrichtung nach Anspruch 5, wobei jedes oxidische Trägermaterial aus Aluminiumoxid gebildet ist.
  7. Vorrichtung nach Anspruch 3, wobei die katalytische Beschichtung (2) weiterhin ein Material enthält, ausgewählt aus der Gruppe bestehend aus Ceroxid, Zirkonoxid, Terbiumoxid, Präseodymoxid und Mischungen davon.
  8. Vorrichtung nach Anspruch 3, wobei der Tiefenfilter (1) ferner mehrere parallel angeordnete Filterelemente (4), die den Katalysator enthalten und durch die das Abgas strömt, aufweist, wobei auf einer Abströmseite der Filterelemente Metallsinterplatten angeordnet sind.
EP02008253A 2001-04-18 2002-04-18 Verfahren und Vorrichtung zum Entfernen von Russpartikeln aus dem Abgas eines Dieselmotors Expired - Lifetime EP1251249B2 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP02008253A EP1251249B2 (de) 2001-04-18 2002-04-18 Verfahren und Vorrichtung zum Entfernen von Russpartikeln aus dem Abgas eines Dieselmotors

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
EP01109571A EP1251248A1 (de) 2001-04-18 2001-04-18 Verfahren und Vorrichtung zur Entfernung von Russpartikeln aus dem Abgas eines Dieselmotors
EP01109571 2001-04-18
EP02008253A EP1251249B2 (de) 2001-04-18 2002-04-18 Verfahren und Vorrichtung zum Entfernen von Russpartikeln aus dem Abgas eines Dieselmotors

Publications (4)

Publication Number Publication Date
EP1251249A2 EP1251249A2 (de) 2002-10-23
EP1251249A3 EP1251249A3 (de) 2003-11-19
EP1251249B1 EP1251249B1 (de) 2006-06-14
EP1251249B2 true EP1251249B2 (de) 2010-06-30

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Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB9802504D0 (en) 1998-02-06 1998-04-01 Johnson Matthey Plc Improvements in emission control
US8833062B1 (en) 2013-03-15 2014-09-16 Daimier Ag Catalytic reduction of NOx
DE10235766A1 (de) * 2002-08-02 2004-02-19 Emitec Gesellschaft Für Emissionstechnologie Mbh Abgasfilter und Verfahren zum Reinigen eines Abgases
DE10353426A1 (de) * 2003-11-15 2005-06-23 Robert Bosch Gmbh Abgassystem für eine Brennkraftmaschine
US7862640B2 (en) 2006-03-21 2011-01-04 Donaldson Company, Inc. Low temperature diesel particulate matter reduction system
US8850802B1 (en) 2013-03-15 2014-10-07 Daimler Ag Catalytic reduction of NOx
CN108554406B (zh) * 2018-01-04 2020-04-24 厦门大学 一种负载合金型碳烟氧化催化剂及其制备方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0979024A (ja) † 1995-09-12 1997-03-25 Toyota Motor Corp ディーゼル機関の排気浄化装置
EP1055805A1 (de) † 1999-05-22 2000-11-29 Degussa-Hüls Aktiengesellschaft Verfahren und Vorrichtung zur Entfernung von Russ aus dem Abgas eines Dieselmotors

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5426936A (en) * 1992-02-21 1995-06-27 Northeastern University Diesel engine exhaust gas recirculation system for NOx control incorporating a compressed air regenerative particulate control system
JP3633396B2 (ja) * 1999-09-16 2005-03-30 日産自動車株式会社 ディーゼル機関の排気浄化装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0979024A (ja) † 1995-09-12 1997-03-25 Toyota Motor Corp ディーゼル機関の排気浄化装置
EP1055805A1 (de) † 1999-05-22 2000-11-29 Degussa-Hüls Aktiengesellschaft Verfahren und Vorrichtung zur Entfernung von Russ aus dem Abgas eines Dieselmotors

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EP1251249A3 (de) 2003-11-19
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