DE3347919C1 - Soot afterburner for diesel engines - Google Patents
Soot afterburner for diesel enginesInfo
- Publication number
- DE3347919C1 DE3347919C1 DE3347919A DE3347919A DE3347919C1 DE 3347919 C1 DE3347919 C1 DE 3347919C1 DE 3347919 A DE3347919 A DE 3347919A DE 3347919 A DE3347919 A DE 3347919A DE 3347919 C1 DE3347919 C1 DE 3347919C1
- Authority
- DE
- Germany
- Prior art keywords
- soot
- metal oxide
- oxide coating
- catalyst
- afterburner
- 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.)
- Expired
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
- B01D53/9445—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC]
- B01D53/9454—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC] characterised by a specific device
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/944—Simultaneously removing carbon monoxide, hydrocarbons or carbon making use of oxidation catalysts
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- 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
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/76—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/83—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with rare earths or actinides
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B3/00—Engines characterised by air compression and subsequent fuel addition
- F02B3/06—Engines characterised by air compression and subsequent fuel addition with compression ignition
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
Während in den bislang bekanntgewordenen Katalysatoren der gesamte Trägerkörper aus dem jeweiligen porösen oxidischen Material bestand, soll erfindungsgemäß ein Zweikomponententräger verwendet werden, der aus einem temperaturwechselbeständigen Grundkörper, vorzugsweise Cordierit, besteht, der mit einer porösen Beschichtung aus einem Gemisch von Aluminiumoxid und Magnesiumoxid versehen ist. Durch diesen Zweikomponententräger, wobei der Grundkörper nicht porös ist, wird vermieden, daß ein Großteil der Katalysatorsubstanz in das Innere der porösen Trägerkeramik gelangt, in der eine nennenswerte Umsetzung über haupt nicht mehr erfolgt. Man hat also die poröse Keramik mit ihrer katalytischen Oberflächenbeschichtung nur in Form einer dünnen Schicht auf dem Grundkörper, so daß tatsächlich eine sehr hohe Umsetzung der zu verbrennenden Bestandteile stattfinden kann, ohne den Anteil an Katalysatorsubstanz allzu hoch zu gestalten. While in the previously known catalysts the entire The carrier body consisted of the respective porous oxidic material, according to the invention a two-component carrier made of a temperature change resistant Base body, preferably cordierite, is made with a porous coating is provided from a mixture of aluminum oxide and magnesium oxide. Through this Two-component carrier, the base body not being porous, avoids that a large part of the catalyst substance gets into the interior of the porous carrier ceramic, in which a significant implementation no longer takes place at all. So you have that porous ceramic with its catalytic surface coating only in the form of a thin layer on the base body, so that actually a very high conversion of the components to be burned can take place without the proportion of to make too high of catalyst substance.
Darüber hinaus hat der Zweikomponententräger den Vorteil, daß die Bildung von Ruß tief im Inneren eines porösen Körpers vermieden wird, die zu einer Sprengung des Trägers führen könnte.In addition, the two-component carrier has the advantage that the Formation of soot deep inside a porous body is avoided leading to a Explosion of the carrier could result.
Weitere Vorteile, Merkmale und Einzelheiten der Erfindung ergeben sich aus der nachfolgenden Beschreibung eines Ausführungsbeispiels, sowie anhand der schematischen Zeichnung. Dabei zeigt F i g. 1 einen Längsschnitt durch einen erfindungsgemäßen Rußnachverbrenner für Dieselmotoren und F i g. 2 einen Querschnitt durch den Rußnachverbrenner nach F i g. 1. Further advantages, features and details of the invention result from the following description of an exemplary embodiment, as well as based on the schematic drawing. F i g. 1 shows a longitudinal section through a Soot afterburners according to the invention for diesel engines and FIG. 2 a cross section through the soot afterburner according to FIG. 1.
In dem im wesentlichen zylindrischen Gehäuse 1 ist der eigentliche, eine Trennwand 2 durchsetzende Trägerkörper 3 angeordnet, der aus hintereinandergeschalteten Platten oder in Form eines stranggepreßten Wabenkörpers (Monolith) ausgebildet ist, wobei die Oberflächen der durchgehenden Kanäle mit der weiter oben beschriebenen Katalysatorsubstanz beschichtet ist. Der obere seitliche Einlaß 4, der an die Auspuffleitung vom Motor angeschlossen ist, mündet tangential in die obere Ringkammer 5 ein, während in gleicher Weise die Auslaßleitung 6 tangential aus der unteren Ringkammer 7 herausgeführt ist. Es hat sich tatsächlich gezeigt, daß durch die zyklonartige Abgasführung eine bessere Absetzung und Verbrennung der Rußbestandteile stattfindet. Die Anordnung der Ein- und Auslaßleitungen 4 und 6 könnte dabei auch vertauscht sein, so daß beispielsweise die Einlaßleitung unten ist. In the essentially cylindrical housing 1 is the actual, a partition 2 penetrating carrier body 3 is arranged, the series-connected from Plates or in the form of an extruded honeycomb body (monolith), the surfaces of the through channels being the same as that described above Catalyst substance is coated. The upper side inlet 4 that connects to the exhaust pipe is connected to the engine, opens tangentially into the upper annular chamber 5, while in the same way the outlet line 6 is led out tangentially from the lower annular chamber 7 is. It has actually been shown that the cyclone-like exhaust system a Better deposition and combustion of the soot components takes place. The order the inlet and outlet lines 4 and 6 could also be interchanged, so that, for example the inlet pipe is down.
Bei 8 und 9 sind schematisch Thermoelemente angedeutet, die zur Überwachung der Einlaß- und Auslaßtemperatur dienen. Am Armaturenbrett des Kraftfahrzeuges ist dabei zweckmäßigerweise ein drei Anzeigenfelder umfassendes Temperaturanzeigeinstrument vorgesehen, wobei die Lage des Zeigers oder des sonstigen Anzeigeorgans im ersten Feld angibt, daß die Auslaßtemperatur kleiner als die Einlaßtemperatur ist. Dies bedeutet den Anfahrfall, in welchem der Katalysator noch nicht warm genug ist, um die Umsetzung und Nachverbrennung insbesondere der Rußbestandteile zu bewirken, die zu einer Erhöhung der Temperatur in der Auslaßkammer 7 gegenüber der Abgastemperatur in der Einlaßkammer 5 führen. Bei ordnungsgemäßer Funktion des Abgasnachverbrenners muß die Auslaßtemperatur in der Kammer 7 größer sein als die Einlaßtemperatur, was einer Zeigerstellung im zweiten (mittleren) Anzeigefeld entspricht. Das dritte Feld wiederum signalisiert den Fall, daß die Auslaßtemperatur sehr viel größer als die Einlaßtemperatur ist. Dies wiederum signalisiert, daß am Motor irgendetwas kaputt ist, daß beispielsweise ein Zylinder ausgefallen ist, so daß nicht nur geringe nachzuverbrennende Bestandteile im Abgas vorhanden sind, sondern ein Teil des Treibstoffes selbst, so daß eine übermäßige Erhitzung im Abgasnachverbrenner stattfindet. Die Stellung des Zeigers in diesem dritten Feld signalisiert also einen Motorschaden, der nicht nur im Interesse des Motors selbst, sondern auch zum Schutz des Nachverbrenners behoben werden muß. At 8 and 9 thermocouples are indicated schematically for monitoring serve for inlet and outlet temperatures. On the dashboard of the vehicle is here it is expedient to have a temperature display instrument comprising three display fields provided, with the position of the pointer or other display element in the first Field indicates that the outlet temperature is less than the inlet temperature. this means the start-up in which the catalytic converter is not yet warm enough to to effect the conversion and afterburning, in particular of the soot components, which leads to an increase in the temperature in the outlet chamber 7 compared to the exhaust gas temperature lead in the inlet chamber 5. If the exhaust gas afterburner is functioning properly the outlet temperature in the chamber 7 must be greater than the inlet temperature, what corresponds to a pointer position in the second (middle) display field. The third field again signals the case that the outlet temperature is much greater than that Inlet temperature is. This in turn signals that something is broken in the engine is that, for example, a cylinder has failed, so that not only minor afterburning Components are present in the exhaust gas, but part of the fuel itself, so that excessive heating takes place in the exhaust gas afterburner. The position of the pointer in this third field signals engine damage that is not only in the interest of the engine itself, but also to protect the afterburner needs to be fixed.
- Leerseite -- blank page -
Claims (6)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3347919A DE3347919C1 (en) | 1983-11-10 | 1983-11-10 | Soot afterburner for diesel engines |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE3340682A DE3340682C2 (en) | 1983-11-10 | 1983-11-10 | Catalyst for the conversion of gases and higher hydrocarbons |
DE3347919A DE3347919C1 (en) | 1983-11-10 | 1983-11-10 | Soot afterburner for diesel engines |
Publications (1)
Publication Number | Publication Date |
---|---|
DE3347919C1 true DE3347919C1 (en) | 1986-12-11 |
Family
ID=25815518
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE3347919A Expired DE3347919C1 (en) | 1983-11-10 | 1983-11-10 | Soot afterburner for diesel engines |
Country Status (1)
Country | Link |
---|---|
DE (1) | DE3347919C1 (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3412289A1 (en) * | 1984-04-03 | 1985-10-10 | Insumma GmbH, 8500 Nürnberg | Apparatus for the catalytic reduction of nitrogen oxides |
EP2335808A1 (en) * | 2009-12-21 | 2011-06-22 | Bernhard Kahlert | NO2 Slip catalyst |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3024491A1 (en) * | 1979-06-29 | 1981-01-29 | Johnson Matthey Co Ltd | COMBUSTION ENGINE |
-
1983
- 1983-11-10 DE DE3347919A patent/DE3347919C1/en not_active Expired
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3024491A1 (en) * | 1979-06-29 | 1981-01-29 | Johnson Matthey Co Ltd | COMBUSTION ENGINE |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3412289A1 (en) * | 1984-04-03 | 1985-10-10 | Insumma GmbH, 8500 Nürnberg | Apparatus for the catalytic reduction of nitrogen oxides |
EP2335808A1 (en) * | 2009-12-21 | 2011-06-22 | Bernhard Kahlert | NO2 Slip catalyst |
WO2011085923A1 (en) * | 2009-12-21 | 2011-07-21 | Bernhard Kahlert | No 2 slip catalyst |
US9205378B2 (en) | 2009-12-21 | 2015-12-08 | Bernhard Kahlert | NO2 slip catalyst |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
8100 | Publication of the examined application without publication of unexamined application | ||
AC | Divided out of |
Ref country code: DE Ref document number: 3340682 Format of ref document f/p: P |
|
D1 | Grant (no unexamined application published) patent law 81 | ||
8364 | No opposition during term of opposition | ||
8327 | Change in the person/name/address of the patent owner |
Owner name: KOCH, CHRISTIAN, DR.-ING., 8570 PEGNITZ, DE |
|
8327 | Change in the person/name/address of the patent owner |
Owner name: KAT-TEC GESELLSCHAFT FUER KATALYSATORTECHNIK MBH, |
|
8330 | Complete disclaimer |