EP2300392A1 - Filter device for removing particles from a gas stream - Google Patents

Filter device for removing particles from a gas stream

Info

Publication number
EP2300392A1
EP2300392A1 EP09753917A EP09753917A EP2300392A1 EP 2300392 A1 EP2300392 A1 EP 2300392A1 EP 09753917 A EP09753917 A EP 09753917A EP 09753917 A EP09753917 A EP 09753917A EP 2300392 A1 EP2300392 A1 EP 2300392A1
Authority
EP
European Patent Office
Prior art keywords
weight
glass phase
group
following composition
filter element
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Withdrawn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
EP09753917A
Other languages
German (de)
French (fr)
Inventor
Johannes Galle
Jochen Linhart
Kathrin Lichtenwalter
Sabine Otterbach
Michael Micke
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.)
Mann and Hummel GmbH
Original Assignee
Mann and Hummel GmbH
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
Priority claimed from DE202008007224U external-priority patent/DE202008007224U1/en
Priority claimed from DE202008007223U external-priority patent/DE202008007223U1/en
Application filed by Mann and Hummel GmbH filed Critical Mann and Hummel GmbH
Publication of EP2300392A1 publication Critical patent/EP2300392A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
    • F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
    • F01N3/022—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 characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
    • F01N3/0222—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 characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous the structure being monolithic, e.g. honeycombs
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C10/00—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
    • C03C10/0009—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition containing silica as main constituent
    • C—CHEMISTRY; METALLURGY
    • C03—GLASS; MINERAL OR SLAG WOOL
    • C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
    • C03C14/00—Glass compositions containing a non-glass component, e.g. compositions containing fibres, filaments, whiskers, platelets, or the like, dispersed in a glass matrix
    • C03C14/004—Glass compositions containing a non-glass component, e.g. compositions containing fibres, filaments, whiskers, platelets, or the like, dispersed in a glass matrix the non-glass component being in the form of particles or flakes
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/46—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates
    • C04B35/462—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates
    • C04B35/478—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on titanium oxides or titanates based on titanates based on aluminium titanates
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
    • C04B38/0006—Honeycomb structures
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2111/00—Mortars, concrete or artificial stone or mixtures to prepare them, characterised by specific function, property or use
    • C04B2111/00474—Uses not provided for elsewhere in C04B2111/00
    • C04B2111/00793—Uses not provided for elsewhere in C04B2111/00 as filters or diaphragms
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3427—Silicates other than clay, e.g. water glass
    • C04B2235/3463—Alumino-silicates other than clay, e.g. mullite
    • C04B2235/3472—Alkali metal alumino-silicates other than clay, e.g. spodumene, alkali feldspars such as albite or orthoclase, micas such as muscovite, zeolites such as natrolite
    • 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
    • F01N2330/00—Structure of catalyst support or particle filter
    • F01N2330/06—Ceramic, e.g. monoliths
    • 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

  • Filter device for removing particles from a gas stream
  • the invention generally relates to a filter device for the removal of
  • the invention relates to a
  • Such filter device for removing soot particles from a Ab ⁇
  • Such a filter device based on aluminum titanate Such a filter device based on aluminum titanate.
  • Such filters are for example in the exhaust aftertreatment
  • ter of a ceramic material for example cordierite or
  • Wand1filter usually have a cylindrical shape with two end faces and a lateral surface and are traversed by the first end face to the second end face of a plurality of lying substantially parallel to the cylinder axis flow channels for the exhaust gases of diesel engines.
  • the cross-sectional shape of the wall flow filter depends on the installation requirements of the motor vehicle. Widely used are filter bodies with a round, elliptical or triangular cross-section.
  • the flow channels usually have a square or hexagonal cross section and are arranged in a narrow grid over the entire cross section of the filter body.
  • a diesel particulate filter ideally combines a low coefficient of thermal expansion, low pressure drop, high strength, and low cost. Problems that can arise with the use of coredite include both low volumetric heat capacity and low thermal conductivity, which can lead to unacceptably high temperatures or temperature peaks during operation, as well as low thermal stability. Furthermore, inorganic particulates present in the diesel exhaust may react with the cordierite and cause filter failures.
  • SiC silicon carbide
  • Ceramic filter elements based on aluminum have recently been used.
  • titanate is the stoichiometric mixed phase of alumina and titania
  • Main component of each of the honeycomb segments comprises at least one of
  • DE 10 2006 040 739 A1 discloses a filter for removing particles from a gas stream, in particular soot particles from an exhaust stream of an internal combustion engine, with a filter body of a ceramic filter substrate, wherein the filter substrate is coated with a porous protective layer of a coating material ,
  • the coating material is selected from the group consisting of aluminum oxides, aluminum hydroxide, titanium dioxide, silicon dioxide, zirconium dioxide, cerium oxide, aluminum silicates, magnesium aluminum silicates, cordierite, mullite, silicon carbide, aluminum titanate, zeolites, quartz, glasses, mixtures and mixed oxides thereof.
  • the mixture contains a mi neralphase, such as, for example, barium, calcium and strontium feldspars.
  • feldspars are natural raw materials that
  • the barium, calcium and strontium feldspars are in the high sintering range
  • the invention is based on the object, a filter for the removal of
  • the present invention solves this problem by providing a
  • Filters for removing particles from a gas stream in particular
  • the filter consists of aluminum titanate to which a glass phase zuge ⁇
  • the single FIGURE shows a schematic representation of a Verbren ⁇
  • the figure shows a schematic representation of a Verbrennungskraft ⁇
  • combustion engine 10 is connected via an exhaust pipe 12, in which the
  • Filter device 14 is arranged. With the filter inlet
  • ter for example. In industrial plants, can be used.
  • the filter device 14 comprises in the illustrated embodiment a
  • cylindrical housing 16 in which, for example, a rotationally symmetrical, in ⁇
  • the filter element 18 consists of
  • Aluminum titanate to which is added a glass phase consisting of borosilicate
  • Borosilicate glasses do not contain alkalis, but they in addition, boron oxide is used.
  • Lead crystal glasses contain a high proportion of lead oxide.
  • the filter element has the following composition: 1. 65-95 wt .-% (Al2O3 ⁇ TiO 2 ); 2. 5-35 wt .-% glass phase.
  • the glass phase has the following composition: 50-90 wt .-% SiO 2 ; ⁇ 2% by weight Fe 2 O 3 ; 1-25% by weight Al 2 O 3 ; 0.5-10% by weight of TiO 2 ; ⁇ 0.5% by weight of R ' 2 O, wherein R' is selected from the group consisting of Li, Na, K, Ru, Cs and Fr; 0.5-20% by weight RO, wherein R is selected from the group consisting of Be, Mg, Ca, Ba and Ra; and ⁇ 10% by weight B 2 O 3
  • the filter element has the following composition: 1. 65-95 wt .-% (Al 2 O 3 ⁇ TiO 2 ); 2. 5-35 wt .-% glass phase.
  • the glass phase has the following composition: 50-90 wt .-% SiO 2 ; ⁇ 2% by weight Fe 2 O 3 ; 1-25% by weight Al 2 O 3 ; 0.5-10% by weight of TiO 2 ; 0.5-10 wt .-% of R '2 O, where R' is selected from the group consisting of Li, Na, K, Ru, Cs and Fr; ⁇ 0.5 wt% RO, wherein R is selected from the group consisting of Be, Mg, Ca, Ba and Ra; and ⁇ 10% by weight B 2 O 3
  • the filter element has the following composition: 1. 65-95 wt .-% (Al 2 O 3 ⁇ TiO 2 ); 2. 5-35 wt .-% glass phase.
  • the glass phase has the following composition: 50-90 wt .-% SiO 2 ; ⁇ 2% by weight Fe 2 O 3 ; 1-25% by weight Al 2 O 3 ; > 10% by weight of TiO 2 ; 0.5-10% by weight of R'20, wherein R 'is selected from the group consisting of Li, Na, K, Ru, Cs and Fr; 0.5-10% by weight RO, wherein R is selected from the group consisting of Be, Mg, Ca, Ba and Ra; and ⁇ 10% by weight
  • the filter element has the following composition: 1. 65-95 wt .-% (Al2O3 ⁇ TiO 2 ); 2. 5-35 wt .-% glass phase.
  • the glass phase has the following composition: 50-90 wt .-% SiO 2 ; ⁇ 2% by weight Fe 2 O 3 ; 1-25% by weight Al 2 O 3 ; 0.5-10% by weight of TiO 2 ; ⁇ 0.5% by weight of R ' 2 O, wherein R' is selected from the group consisting of Li, Na, K, Ru, Cs and Fr; 0.5-20% by weight RO, wherein R is selected from the group consisting of Be, Mg, Ca, Ba and Ra; and ⁇ 20 wt% PbO.
  • the filter element has the following composition: 1. 65-95 wt .-% (Al 2 O 3 ⁇ TiO 2 ); 2. 5-35 wt .-% glass phase.
  • the glass phase has the following composition: 50-90 wt .-% SiO 2 ; ⁇ 2% by weight Fe 2 O 3 ; 1-25% by weight Al 2 O 3 ; 0.5-10% by weight of TiO 2 ; 0.5-20 wt .-% of R '2 O, where R' is selected from the group consisting of Li, Na, K, Ru, Cs and Fr; ⁇ 0.5 wt% RO, wherein R is selected from the group consisting of Be, Mg, Ca, Ba and Ra; and ⁇ 20 wt% PbO.
  • the filter element has the following composition: 1. 65-95 wt .-% (Al 2 O 3 ⁇ TiO 2 ); 2. 5-35% by weight Glass phase.
  • the glass phase has the following composition: 50-90 wt .-% SiO 2 ; ⁇ 2% by weight Fe 2 O 3 ; 1-25% by weight Al 2 O 3 ; > 10% by weight of TiO 2 ; 0.5-20 wt .-% of R '2 O, where R' is selected from the group consisting of Li, Na, K, Ru, Cs and Fr; 0.5-20% by weight RO, wherein R is selected from the group consisting of Be, Mg, Ca, Ba and Ra; and ⁇ 20 wt% PbO.
  • the filter device according to the invention consists of a temperature-resistant material and is therefore suitable for use as a diesel particulate filter.
  • the material properties can be better influenced and the microstructural properties adjusted better.
  • the filter device according to the invention shows a good thermal shock resistance and a low thermal expansion.

Abstract

The invention relates to a filter device for removing particles from a gas stream, especially of particles from an exhaust gas stream of an internal combustion engine, comprising a filter element, said filter element consisting of an aluminum titanate to which a glass phase is added. Said glass phase consists of borosilicate glasses or lead glasses.

Description

Beschreibung description
Filtereinrichtung zur Entfernung von Partikeln aus einem GasstromFilter device for removing particles from a gas stream
Technisches GebietTechnical area
[0001] Die Erfindung betrifft allgemein eine Filtereinrichtung zur Entfernung vonThe invention generally relates to a filter device for the removal of
Partikeln aus einem Gasstrom. Insbesondere betrifft die Erfindung eineParticles from a gas stream. In particular, the invention relates to a
solche Filtereinrichtung zur Entfernung von Rußpartikeln aus einem Ab¬Such filter device for removing soot particles from a Ab¬
gasstrom einer Brennkraftmaschine. Ganz speziell betrifft die ErfindungGas flow of an internal combustion engine. More specifically, the invention relates
eine solche Filtereinrichtung auf der Basis von Aluminiumtitanat.Such a filter device based on aluminum titanate.
[0002] Derartige Filter werden zum Beispiel bei der AbgasnachbehandlungSuch filters are for example in the exhaust aftertreatment
selbstentzündender Verbrennungskraftmaschinen, insbesondere in die¬self-igniting internal combustion engines, especially in die¬
selbetriebenen Kraftfahrzeugen eingesetzt. Üblicherweise sind solche Fil¬self-propelled motor vehicles used. Usually, such Fil¬
ter aus einem keramischen Material, zum Beispiel Cordierit oderter of a ceramic material, for example cordierite or
Siliziumcarbid gefertigt. Keramische Körper aus Cordierit finden Verwen¬Made of silicon carbide. Cordierite ceramic bodies are used
dung in einer Vielzahl von Hochtemperatur-Anwendungen, wie zum Bei¬tion in a variety of high-temperature applications, such Bei¬
spiel katalytischen Konvertern, NOx-Adsorbern, elektrisch geheizten Kata¬play catalytic converters, NO x adsorbers, electrically heated Kata¬
lysatoren, chemischen Prozesssubstraten und eben auch Dieselpartikel¬lysatoren, chemical process substrates and just also Dieselpartikel¬
filter.filter.
[0003] Bei der Filtration von Dieselabgasen war Cordierit als kostengünstigesIn the filtration of diesel exhaust was cordierite as cost
Material, das einen niedrigen thermischen Ausdehnungskoeffizienten auf¬Material that auf¬ a low thermal expansion coefficient
weist, lange das Material der Wahl. Poröse Cordierit-Keramikfilter wurdenshows, long the material of choice. Porous cordierite ceramic filters were used
in Form von Wandflussfiltern seit den frühen 80er Jahren zur Entfernungin the form of Wandflussfiltern since the early 80s for removal
von Partikeln im Abgasstrom von Dieselmotoren verwendet. [0004] Wandflussfilter besitzen in der Regel eine zylindrische Form mit zwei Stirnflächen und einer Mantelfläche und werden von der ersten Stirnfläche zur zweiten Stirnfläche von einer Vielzahl von im Wesentlichen parallel zur Zylinderachse liegenden Strömungskanälen für die Abgase von Dieselmotoren durchzogen. Die Querschnittsform der Wandflussfilter hängt von den Einbauerfordernissen am Kraftfahrzeug ab. Weit verbreitet sind Filterkörper mit rundem, elliptischem oder dreiecksförmigem Querschnitt. Die Strömungskanäle weisen meist einen quadratischen oder hexagonalen Querschnitt auf und sind in einem engen Raster über den gesamten Querschnitt der Filterkörper angeordnet.used by particles in the exhaust stream of diesel engines. Wandflussfilter usually have a cylindrical shape with two end faces and a lateral surface and are traversed by the first end face to the second end face of a plurality of lying substantially parallel to the cylinder axis flow channels for the exhaust gases of diesel engines. The cross-sectional shape of the wall flow filter depends on the installation requirements of the motor vehicle. Widely used are filter bodies with a round, elliptical or triangular cross-section. The flow channels usually have a square or hexagonal cross section and are arranged in a narrow grid over the entire cross section of the filter body.
[0005] Ein Dieselpartikelfilter (DPF) vereint idealerweise einen niedrigen thermischen Ausdehnungskoeffizienten, einen geringen Druckabfall, hohe Festigkeit und geringe Kosten. Probleme, die bei der Verwendung von Cor- dierit auftauchen können, umfassen sowohl eine niedrige volumetrische Wärmekapazität und niedrige thermische Leitfähigkeit, was zu nicht akzeptablen hohen Temperaturen oder Temperaturspitzen während des Betriebs führen kann, als auch eine geringe thermische Beständigkeit. Des weiteren können im Dieselabgas vorhandene anorganische Partikel mit dem Cordierit reagieren und Filterausfälle hervorrufen.A diesel particulate filter (DPF) ideally combines a low coefficient of thermal expansion, low pressure drop, high strength, and low cost. Problems that can arise with the use of coredite include both low volumetric heat capacity and low thermal conductivity, which can lead to unacceptably high temperatures or temperature peaks during operation, as well as low thermal stability. Furthermore, inorganic particulates present in the diesel exhaust may react with the cordierite and cause filter failures.
[0006] Ein alternatives Material zu Cordierit bei der Herstellung von Diesel- Partikelfiltern ist Siliciumcarbid (SiC). Obwohl dieses Material sowohl eine hohe volumetrische Wärmekapazität als auch eine hohe thermische Leit- fähigkeit aufweist, besitzt es, als Ergebnis einer relativ hohen Wärmeaus¬An alternative material to cordierite in the manufacture of diesel particulate filters is silicon carbide (SiC). Although this material has both a high volumetric heat capacity and a high thermal conductivity has ability, it has, as a result of a relatively high heat Aus¬
dehnung und eines hohen Elastizitätsmoduls auch eine schlechte Tempe¬Elongation and a high modulus of elasticity also a bad Tempe¬
raturwechselbeständigkeit. Dies macht es notwendig, SiC-Filter zu seg¬raturwechselbeständigkeit. This makes it necessary to segregate SiC filters
mentieren, um bei der Verwendung Ausfälle zu verhindern. Auch resultie¬to prevent failures during use. Also resultie¬
ren die Verarbeitungserfordernisse (d.h., hohe Temperaturen, Inert¬the processing requirements (i.e., high temperatures, inert
atmosphäre und Segmentation) in hohen Herstellungskosten.atmosphere and segmentation) in high production costs.
[0007] In neuerer Zeit sind keramische Filterelemente auf der Basis von Alumi-Ceramic filter elements based on aluminum have recently been used.
niumtitanat bekannt geworden, die geeignete Eigenschaften zur Anwen¬nium titanate become known, the suitable properties for Anwen¬
dung bei hohen Temperaturen, wie z.B. Fahrzeug-Abgaskontrolle undat high temperatures, e.g. Vehicle exhaust control and
Dieselabgas-Nachbehandlungssysteme wie DPFs, aufweisen. Aluminium-Diesel exhaust aftertreatment systems such as DPFs. Aluminum-
titanat ist die stöchiometrische Mischphase von Aluminiumoxid und Titan¬titanate is the stoichiometric mixed phase of alumina and titania
dioxid. Es zeichnet sich aus durch eine niedrige Wärmeleitfähigkeit, einendioxide. It is characterized by a low thermal conductivity, a
sehr niedrigen Wärmeausdehnungskoeffizienten und eine damit verbun¬very low thermal expansion coefficient and a verbun¬ with it
dene sehr hohe Temperaturwechselbeständigkeit.dene very high thermal shock resistance.
Stand der TechnikState of the art
[0008] Aus DE 602 17 084 T2 ist eine Wabenstruktur mit einer Vielzahl von Wa¬From DE 602 17 084 T2 is a honeycomb structure having a plurality of Wa¬
bensegmenten bekannt, die zu einem Einheitskörper verbunden sind. Diebensegmenten known, which are connected to a unitary body. The
Hauptkomponente jedes der Wabensegmente umfasst zumindest eine ausMain component of each of the honeycomb segments comprises at least one of
Siliciumcarbid, Siliciumnitrid, Cordierit, Aluminiumoxid, MuIMt,Silicon carbide, silicon nitride, cordierite, alumina, MuMt,
Zirkoniumdioxid, Zirkoniumphosphat, Aluminiumtitanat, Titandioxid undZirconia, zirconium phosphate, aluminum titanate, titanium dioxide and
Kombinationen davon. [0009] Die DE 10 2006 040 739 A1 offenbart einen Filter zur Entfernung von Partikeln aus einem Gasstrom, insbesondere von Rußpartikeln aus einem Abgasstrom einer Verbrennungskraftmaschine, mit einem Filterkörper aus einem keramischen Filtersubstrat, wobei das Filtersubstrat mit einer porösen Schutzschicht aus einem Beschichtungsmaterial beschichtet ist. Das Beschichtungsmaterial ist ausgewählt aus der Gruppe bestehend aus Aluminiumoxide, Aluminiumhydroxid, Titandioxid, Siliziumdioxid, Zirkon- dioxid, Ceroxid, Aluminiumsilikate, Magnesium-Aluminiumsilikate, Cordie- rit, Mullite, Siliciumcarbid, Aluminiumtitanat, Zeolithe, Quarz, Gläser, Mischungen und Mischoxide daraus.Combinations of it. DE 10 2006 040 739 A1 discloses a filter for removing particles from a gas stream, in particular soot particles from an exhaust stream of an internal combustion engine, with a filter body of a ceramic filter substrate, wherein the filter substrate is coated with a porous protective layer of a coating material , The coating material is selected from the group consisting of aluminum oxides, aluminum hydroxide, titanium dioxide, silicon dioxide, zirconium dioxide, cerium oxide, aluminum silicates, magnesium aluminum silicates, cordierite, mullite, silicon carbide, aluminum titanate, zeolites, quartz, glasses, mixtures and mixed oxides thereof.
[0010] Schließlich offenbart die WO 2005/046840 einen keramischen Körper zur Verwendung als DPF mit einer Zusammensetzung, die umfasst: 8(AI2O3TiO2) + b(CaO AI2O3-2SiO2) + c(SrO AI2O3-2SiO2) + d(BaO AI2O3-2SiO2) + e(3AI2O3-2SiO2) + f(AI2O3) + g(SiO2) + In(Fe2O3TiO2) + i(MgO-2TiO2), worin a, b, c, d, e, f, g, h, und i Gewichtsfraktionen jeder Komponente darstellen, so dass (a+b+c+d+e+f+g+h+i)=1 , und die folgenden Bedingungen erfüllt sind 0.5 < a < 0.95; 0 ≤ b ≤ 0,5; 0 < c < 0.5; 0 < d < 0.5; 0 < e < 0.5; 0 < f < 0.5; 0 < g < 0.1 ; 0 < h < 0.3; 0 < i < 0.3; b+d > 0,01. Es handelt sich hierbei um eine Mischung aus Aluminiumtitanat und einer Glasphase, wobei es sich bei den Gläsern um solche aus Erdalkalien, Alkalien, Siliziumdioxid, Aluminiumdioxid, Alkali- und Erdalkaligläsern handelt. Des weiteren enthält die Mischung eine Mi- neralphase, wie bspw. Barium-, Calcium- und Strontium-Feldspäte. Nach¬Finally, WO 2005/046840 discloses a ceramic body for use as a DPF having a composition comprising: 8 (Al 2 O 3 TiO 2 ) + b (CaO Al 2 O 3 -2SiO 2 ) + c (SrO Al 2 O 3 -2SiO 2 ) + d (BaO Al 2 O 3 -2SiO 2 ) + e (3Al 2 O 3 -2SiO 2 ) + f (Al 2 O 3 ) + g (SiO 2 ) + In (Fe 2 O 3 TiO 2 ) + i (MgO-2TiO 2 ), where a, b, c, d, e, f, g, h, and i represent weight fractions of each component such that (a + b + c + d + e + f + g + h + i) = 1, and the following conditions are satisfied 0.5 <a <0.95; 0 ≤ b ≤ 0.5; 0 <c <0.5; 0 <d <0.5; 0 <e <0.5; 0 <f <0.5; 0 <g <0.1; 0 <h <0.3; 0 <i <0.3; b + d> 0.01. It is a mixture of aluminum titanate and a glass phase, with the glasses being those of alkaline earths, alkalis, silica, alumina, alkali and alkaline earth glasses. Furthermore, the mixture contains a mi neralphase, such as, for example, barium, calcium and strontium feldspars. Nach¬
teilig daran ist, dass Feldspäte natürliche Rohstoffe darstellen, diePart of it is that feldspars are natural raw materials that
Schwankungen unterliegen und auch Verunreinigungen enthalten können.Subject to fluctuations and may also contain impurities.
Strontium-Feldspat ist zudem extrem schwer erhältlich. Weitere NachteileStrontium feldspar is also extremely difficult to obtain. Other disadvantages
der Barium-, Calcium- und Strontiumfeldspäte liegen in der hohen Sinter¬the barium, calcium and strontium feldspars are in the high sintering range
temperatur und der schwierigen Verarbeitbarkeit. Calcium- und insbeson¬temperature and difficult processability. Calcium and insbeson¬
dere Bariumverbindungen sind sehr reizend, Strontiumverbindungen sindthese barium compounds are very irritating, strontium compounds are
schwach radioaktiv.weakly radioactive.
[0011] Der Erfindung liegt die Aufgabe zugrunde, ein Filter zur Entfernung vonThe invention is based on the object, a filter for the removal of
Partikeln aus einem Gasstrom, insbesondere ein Dieselpartikelfilter aufParticles from a gas stream, in particular a diesel particulate filter on
der Basis von Aluminiumtitanat bereit zu stellen, bei dem eine bessereto provide the basis of aluminum titanate in which a better
Beeinflussung der Materialeigenschaften möglich ist und die Gefüge¬Influencing the material properties is possible and the microstructure
eigenschaften gut einstellbar sind. Weitere Aufgaben liegen in der Bereit¬properties are easily adjustable. Further tasks are in the ready
stellung einer höheren mechanischen Festigkeit und einer niedrigerena higher mechanical strength and a lower one
Wärmedehnung.Thermal expansion.
Offenbarung der ErfindungDisclosure of the invention
[0012] Die vorliegende Erfindung löst diese Aufgabe durch Bereitstellen einesThe present invention solves this problem by providing a
Filters zur Entfernung von Partikeln aus einem Gasstrom, insbesondereFilters for removing particles from a gas stream, in particular
von Partikeln aus einem Abgasstrom einer Verbrennungskraftmaschine,of particles from an exhaust gas stream of an internal combustion engine,
wobei der Filter aus Aluminiumtitanat besteht, dem eine Glasphase zuge¬wherein the filter consists of aluminum titanate to which a glass phase zuge¬
geben ist, und die Glasphase aus Borosilikatgläsern oder Bleikristallglä¬is given, and the glass phase of borosilicate glasses or lead crystal
sern besteht. Kurze Beschreibung der Zeichnungenexists. Brief description of the drawings
[0013] Die einzige Figur zeigt eine schematische Darstellung einer Verbren¬The single FIGURE shows a schematic representation of a Verbren¬
nungskraftmaschine mit einer erfindungsgemäßen Filtereinrichtung.combustion engine with a filter device according to the invention.
Ausführungsform(en) der ErfindungEmbodiment (s) of the invention
[0014] Die Figur zeigt eine schematische Darstellung einer Verbrennungskraft¬The figure shows a schematic representation of a Verbrennungskraft¬
maschine mit einer erfindungsgemäßen Filtereinrichtung. Die Verbren¬Machine with a filter device according to the invention. The burners
nungskraftmaschine 10 ist über ein Abgasrohr 12 verbunden, in dem diecombustion engine 10 is connected via an exhaust pipe 12, in which the
erfindungsgemäße Filtereinrichtung 14 angeordnet ist. Mit der Filterein¬Filter device 14 according to the invention is arranged. With the filter inlet
richtung 14 werden Rußpartikel aus dem im Abgasrohr 12 strömendenDirection 14 soot particles from the flowing in the exhaust pipe 12
Abgas herausgefiltert. Dies ist insbesondere bei Dieselkraftmaschinen er¬Exhaust filtered out. This is especially in diesel engines er¬
forderlich, um gesetzliche Bestimmungen einzuhalten. Es ist darauf hin¬necessary to comply with legal requirements. It is hin¬
zuweisen, dass die erfindungsgemäße Filtereinrichtung nicht auf die Ver¬assign that the filter device according to the invention not on Ver¬
wendung als DPF beschränkt ist, sondern ganz allgemein als Heißgasfil¬is limited as DPF, but quite generally as Heißgasfil¬
ter, bspw. in Industrieanlagen, eingesetzt werden kann.ter, for example. In industrial plants, can be used.
[0015] Die Filtereinrichtung 14 umfasst im gezeigten Ausführungsbeispiel einThe filter device 14 comprises in the illustrated embodiment a
zylindrisches Gehäuse 16, in dem bspw. ein rotationssymmetrisches, in¬cylindrical housing 16, in which, for example, a rotationally symmetrical, in¬
sgesamt ebenfalls zylindrisches Filterelement 18 angeordnet ist. AndereTotally also cylindrical filter element 18 is arranged. Other
Gehäuseformen sind ebenfalls möglich. Das Filterelement 18 besteht ausHousing forms are also possible. The filter element 18 consists of
Aluminiumtitanat, dem eine Glasphase zugesetzt ist, die aus Borosilikat-Aluminum titanate to which is added a glass phase consisting of borosilicate
gläsern oder Bleikristallgläsern besteht.glass or lead crystal glass.
[0016] Sowohl Borosilikatgläser als auch Bleikristallgläser unterscheiden sichBoth borosilicate glasses and lead crystal glasses differ
von den bisher verwendeten Gläsern in ihrer Zusammensetzung und ih¬from the glasses used hitherto in their composition and ih¬
rem Eigenschaften. Borosilikatgläser enthalten keine Alkalien, dafür ver- wendet man zusätzlich Boroxid. Bleikristallgläser enthalten einen hohen Anteil an Bleioxid.rem properties. Borosilicate glasses do not contain alkalis, but they in addition, boron oxide is used. Lead crystal glasses contain a high proportion of lead oxide.
[0017] In einer ersten Ausführungsform weist das Filterelement die folgende Zusammensetzung auf: 1. 65-95 Gew.-% (AI2O3 ■ TiO2); 2. 5-35 Gew.-% Glasphase. Die Glasphase weist folgende Zusammensetzung auf: 50-90 Gew.-% SiO2; < 2 Gew.-% Fe2O3; 1-25 Gew.-% AI2O3; 0,5-10 Gew.-% TiO2; < 0,5 Gew.-% R'2O, wobei R' ausgewählt ist aus der Gruppe bestehend aus Li, Na, K, Ru, Cs und Fr; 0,5-20 Gew.-% RO, wobei R ausgewählt ist aus der Gruppe bestehend aus Be, Mg, Ca, Ba und Ra; und < 10 Gew.-% B2O3 In a first embodiment, the filter element has the following composition: 1. 65-95 wt .-% (Al2O3 ■ TiO 2 ); 2. 5-35 wt .-% glass phase. The glass phase has the following composition: 50-90 wt .-% SiO 2 ; <2% by weight Fe 2 O 3 ; 1-25% by weight Al 2 O 3 ; 0.5-10% by weight of TiO 2 ; <0.5% by weight of R ' 2 O, wherein R' is selected from the group consisting of Li, Na, K, Ru, Cs and Fr; 0.5-20% by weight RO, wherein R is selected from the group consisting of Be, Mg, Ca, Ba and Ra; and <10% by weight B 2 O 3
[0018] In einer zweiten Ausführungsform weist das Filterelement die folgende Zusammensetzung auf: 1. 65-95 Gew.-% (AI2O3 ■ TiO2); 2. 5-35 Gew.-% Glasphase. Die Glasphase weist folgende Zusammensetzung auf: 50-90 Gew.-% SiO2; < 2 Gew.-% Fe2O3; 1-25 Gew.-% AI2O3; 0,5-10 Gew.-% TiO2; 0,5-10 Gew.-% R'2O, wobei R' ausgewählt ist aus der Gruppe bestehend aus Li, Na, K, Ru, Cs und Fr; < 0,5 Gew.-% RO, wobei R ausgewählt ist aus der Gruppe bestehend aus Be, Mg, Ca, Ba und Ra; und < 10 Gew.-% B2O3 In a second embodiment, the filter element has the following composition: 1. 65-95 wt .-% (Al 2 O 3 ■ TiO 2 ); 2. 5-35 wt .-% glass phase. The glass phase has the following composition: 50-90 wt .-% SiO 2 ; <2% by weight Fe 2 O 3 ; 1-25% by weight Al 2 O 3 ; 0.5-10% by weight of TiO 2 ; 0.5-10 wt .-% of R '2 O, where R' is selected from the group consisting of Li, Na, K, Ru, Cs and Fr; <0.5 wt% RO, wherein R is selected from the group consisting of Be, Mg, Ca, Ba and Ra; and <10% by weight B 2 O 3
[0019] In einer dritten Ausführungsform weist das Filterelement die folgende Zusammensetzung auf: 1. 65-95 Gew.-% (AI2O3 ■ TiO2); 2. 5-35 Gew.-% Glasphase. Die Glasphase weist folgende Zusammensetzung auf: 50-90 Gew.-% SiO2; < 2 Gew.-% Fe2O3; 1-25 Gew.-% AI2O3; > 10 Gew.-% TiO2; 0,5-10 Gew.-% R'20, wobei R' ausgewählt ist aus der Gruppe bestehend aus Li, Na, K, Ru, Cs und Fr; 0,5-10 Gew.-% RO, wobei R ausgewählt ist aus der Gruppe bestehend aus Be, Mg, Ca, Ba und Ra; und < 10 Gew.-%In a third embodiment, the filter element has the following composition: 1. 65-95 wt .-% (Al 2 O 3 ■ TiO 2 ); 2. 5-35 wt .-% glass phase. The glass phase has the following composition: 50-90 wt .-% SiO 2 ; <2% by weight Fe 2 O 3 ; 1-25% by weight Al 2 O 3 ; > 10% by weight of TiO 2 ; 0.5-10% by weight of R'20, wherein R 'is selected from the group consisting of Li, Na, K, Ru, Cs and Fr; 0.5-10% by weight RO, wherein R is selected from the group consisting of Be, Mg, Ca, Ba and Ra; and <10% by weight
[0020] In einer vierten Ausführungsform weist das Filterelement die folgende Zusammensetzung auf: 1. 65-95 Gew.-% (AI2O3 ■ TiO2); 2. 5-35 Gew.-% Glasphase. Die Glasphase weist folgende Zusammensetzung auf: 50-90 Gew.-% SiO2; < 2 Gew.-% Fe2O3; 1-25 Gew.-% AI2O3; 0,5-10 Gew.-% TiO2; < 0,5 Gew.-% R'2O, wobei R' ausgewählt ist aus der Gruppe bestehend aus Li, Na, K, Ru, Cs und Fr; 0,5-20 Gew.-% RO, wobei R ausgewählt ist aus der Gruppe bestehend aus Be, Mg, Ca, Ba und Ra; und < 20 Gew.-% PbO.In a fourth embodiment, the filter element has the following composition: 1. 65-95 wt .-% (Al2O3 ■ TiO 2 ); 2. 5-35 wt .-% glass phase. The glass phase has the following composition: 50-90 wt .-% SiO 2 ; <2% by weight Fe 2 O 3 ; 1-25% by weight Al 2 O 3 ; 0.5-10% by weight of TiO 2 ; <0.5% by weight of R ' 2 O, wherein R' is selected from the group consisting of Li, Na, K, Ru, Cs and Fr; 0.5-20% by weight RO, wherein R is selected from the group consisting of Be, Mg, Ca, Ba and Ra; and <20 wt% PbO.
[0021] In einer fünften Ausführungsform weist das Filterelement die folgende Zusammensetzung auf: 1. 65-95 Gew.-% (AI2O3 ■ TiO2); 2. 5-35 Gew.-% Glasphase. Die Glasphase weist folgende Zusammensetzung auf: 50-90 Gew.-% SiO2; < 2 Gew.-% Fe2O3; 1-25 Gew.-% AI2O3; 0,5-10 Gew.-% TiO2; 0,5-20 Gew.-% R'2O, wobei R' ausgewählt ist aus der Gruppe bestehend aus Li, Na, K, Ru, Cs und Fr; < 0,5 Gew.-% RO, wobei R ausgewählt ist aus der Gruppe bestehend aus Be, Mg, Ca, Ba und Ra; und < 20 Gew.-% PbO.In a fifth embodiment, the filter element has the following composition: 1. 65-95 wt .-% (Al 2 O 3 ■ TiO 2 ); 2. 5-35 wt .-% glass phase. The glass phase has the following composition: 50-90 wt .-% SiO 2 ; <2% by weight Fe 2 O 3 ; 1-25% by weight Al 2 O 3 ; 0.5-10% by weight of TiO 2 ; 0.5-20 wt .-% of R '2 O, where R' is selected from the group consisting of Li, Na, K, Ru, Cs and Fr; <0.5 wt% RO, wherein R is selected from the group consisting of Be, Mg, Ca, Ba and Ra; and <20 wt% PbO.
[0022] In einer sechsten Ausführungsform weist das Filterelement die folgende Zusammensetzung auf: 1. 65-95 Gew.-% (AI2O3 ■ TiO2); 2. 5-35 Gew.-% Glasphase. Die Glasphase weist folgende Zusammensetzung auf: 50-90 Gew.-% SiO2; < 2 Gew.-% Fe2O3; 1-25 Gew.-% AI2O3; > 10 Gew.-% TiO2; 0,5-20 Gew.-% R'2O, wobei R' ausgewählt ist aus der Gruppe bestehend aus Li, Na, K, Ru, Cs und Fr; 0,5-20 Gew.-% RO, wobei R ausgewählt ist aus der Gruppe bestehend aus Be, Mg, Ca, Ba und Ra; und < 20 Gew.-% PbO. Die erfindungsgemäße Filtereinrichtung besteht aus einem temperaturbeständigen Material und ist daher für den Einsatz als Dieselpartikelfilter geeignet. Durch die Auswahl der erfindungsgemäßen Glasphase lassen sich die Materialeigenschaften besser beeinflussen und die Gefügeeigenschaften besser einstellen. Die erfindungsgemäße Filtereinrichtung zeigt eine gute Temperaturwechselbeständigkeit und eine niedrige Wärmeausdehnung. In a sixth embodiment, the filter element has the following composition: 1. 65-95 wt .-% (Al 2 O 3 ■ TiO 2 ); 2. 5-35% by weight Glass phase. The glass phase has the following composition: 50-90 wt .-% SiO 2 ; <2% by weight Fe 2 O 3 ; 1-25% by weight Al 2 O 3 ; > 10% by weight of TiO 2 ; 0.5-20 wt .-% of R '2 O, where R' is selected from the group consisting of Li, Na, K, Ru, Cs and Fr; 0.5-20% by weight RO, wherein R is selected from the group consisting of Be, Mg, Ca, Ba and Ra; and <20 wt% PbO. The filter device according to the invention consists of a temperature-resistant material and is therefore suitable for use as a diesel particulate filter. By selecting the glass phase according to the invention, the material properties can be better influenced and the microstructural properties adjusted better. The filter device according to the invention shows a good thermal shock resistance and a low thermal expansion.

Claims

Ansprüche claims
1. Filtereinrichtung (14) zur Entfernung von Partikeln aus einem Gasstrom, insbesondere von Partikeln aus einem Abgasstrom einer Verbrennungskraftmaschine, mit einem Filterelement (18), wobei das Filterelement aus Aluminiumti- tanat besteht, dem eine Glasphase zugegeben ist, dadurch gekennzeichnet, dass die Glasphase aus Borosilikatgläsern oder Bleikristallgläsern besteht.1. Filter device (14) for removing particles from a gas stream, in particular from particles from an exhaust gas stream of an internal combustion engine, with a filter element (18), wherein the filter element consists of aluminum tantate, to which a glass phase is added, characterized in that the Glass phase consists of borosilicate glasses or lead crystal glass.
2. Filtereinrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass das Filterelement folgende Zusammensetzung aufweist: 1. 65-95 Gew.-% (AI2O3 ■ TiO2); 2. 5-35 Gew.-% Glasphase, wobei die Glasphase folgende Zusammensetzung aufweist: 50-90 Gew.-% SiO2; < 2 Gew.-% Fe2O3; 1-25 Gew.-% AI2O3; 0,5-10 Gew.-% TiO2; < 0,5 Gew.-% R'2O, wobei R' ausgewählt ist aus der Gruppe bestehend aus Li, Na, K, Ru, Cs und Fr; 0,5-20 Gew.-% RO, wobei R ausgewählt ist aus der Gruppe bestehend aus Be, Mg, Ca, Ba und Ra; und < 10 Gew.-% B2O3.2. Filter device according to claim 1, characterized in that the filter element has the following composition: 1. 65-95 wt .-% (Al2O3 ■ TiO2); 2. 5-35 wt .-% glass phase, wherein the glass phase has the following composition: 50-90 wt .-% SiO 2 ; <2% by weight Fe 2 O 3 ; 1-25% by weight Al 2 O 3 ; 0.5-10% by weight of TiO 2 ; <0.5% by weight of R ' 2 O, wherein R' is selected from the group consisting of Li, Na, K, Ru, Cs and Fr; 0.5-20% by weight RO, wherein R is selected from the group consisting of Be, Mg, Ca, Ba and Ra; and <10% by weight B 2 O 3 .
3. Filtereinrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass das Filterelement folgende Zusammensetzung aufweist: 1. 65-95 Gew.-% (AI2O3 ■ TiO2); 2. 5-35 Gew.-% Glasphase, wobei die Glasphase folgende Zusammensetzung aufweist: 50-90 Gew.-% SiO2; < 2 Gew.-% Fe2O3; 1-25 Gew.-% AI2O3; 0,5-10 Gew.-% TiO2; 0,5-10 Gew.-% R'2O, wobei R' ausgewählt ist aus der Gruppe bestehend aus Li, Na, K, Ru, Cs und Fr; < 0,5 Gew.-% RO, wobei R ausgewählt ist aus der Gruppe bestehend aus Be, Mg, Ca, Ba und Ra; und < 10 Gew.-% B2O3. 3. Filter device according to claim 1, characterized in that the filter element has the following composition: 1. 65-95 wt .-% (Al 2 O 3 ■ TiO 2 ); 2. 5-35 wt .-% glass phase, wherein the glass phase has the following composition: 50-90 wt .-% SiO 2 ; <2% by weight Fe 2 O 3 ; 1-25% by weight Al 2 O 3 ; 0.5-10% by weight of TiO 2 ; 0.5-10 wt .-% of R '2 O, where R' is selected from the group consisting of Li, Na, K, Ru, Cs and Fr; <0.5 wt% RO, wherein R is selected from the group consisting of Be, Mg, Ca, Ba and Ra; and <10% by weight B 2 O 3 .
4. Filtereinrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass das Filterelement folgende Zusammensetzung aufweist: 1. 65-95 Gew.-% (AI2O3 ■ Tiθ2); 2. 5-35 Gew.-% Glasphase, wobei die Glasphase folgende Zusammensetzung aufweist: 50-90 Gew.-% Siθ2; < 2 Gew.-% Fβ2θ3; 1-25 Gew.-% AI2O3; > 10 Gew.-% TiO2; 0,5-10 Gew.-% R'20, wobei R' ausgewählt ist aus der Gruppe bestehend aus Li, Na, K, Ru, Cs und Fr; 0,5-10 Gew.-% RO, wobei R ausgewählt ist aus der Gruppe bestehend aus Be, Mg, Ca, Ba und Ra; und < 10 Gew.-% B2O3.4. Filter device according to claim 1, characterized in that the filter element has the following composition: 1. 65-95 wt .-% (Al2O3 ■ Tiθ2); 2. 5-35 wt .-% glass phase, wherein the glass phase has the following composition: 50-90 wt .-% SiO 2; <2% by weight of Fβ2θ3; 1-25% by weight of Al 2 O 3; > 10% by weight of TiO 2 ; 0.5-10% by weight of R'20, wherein R 'is selected from the group consisting of Li, Na, K, Ru, Cs and Fr; 0.5-10% by weight RO, wherein R is selected from the group consisting of Be, Mg, Ca, Ba and Ra; and <10% by weight B 2 O 3 .
5. Filtereinrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass das Filterelement folgende Zusammensetzung aufweist: 1. 65-95 Gew.-% (AI2O3 ■ TiO2); 2. 5-35 Gew.-% Glasphase, wobei die Glasphase folgende Zusammensetzung aufweist: 50-90 Gew.-% SiO2; < 2 Gew.-% Fe2O3; 1-25 Gew.-% AI2O3; 0,5-10 Gew.-% TiO2; < 0,5 Gew.-% R'2O, wobei R' ausgewählt ist aus der Gruppe bestehend aus Li, Na, K, Ru, Cs und Fr; 0,5-20 Gew.-% RO, wobei R ausgewählt ist aus der Gruppe bestehend aus Be, Mg, Ca, Ba und Ra; und < 20 Gew.-% PbO.5. Filter device according to claim 1, characterized in that the filter element has the following composition: 1. 65-95 wt .-% (Al2O3 ■ TiO 2 ); 2. 5-35 wt .-% glass phase, wherein the glass phase has the following composition: 50-90 wt .-% SiO 2 ; <2% by weight Fe 2 O 3 ; 1-25% by weight Al 2 O 3 ; 0.5-10% by weight of TiO 2 ; <0.5% by weight of R ' 2 O, wherein R' is selected from the group consisting of Li, Na, K, Ru, Cs and Fr; 0.5-20% by weight RO, wherein R is selected from the group consisting of Be, Mg, Ca, Ba and Ra; and <20 wt% PbO.
6. Filtereinrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass das Filterelement folgende Zusammensetzung aufweist: 1. 65-95 Gew.-% (AI2O3 ■ TiO2); 2. 5-35 Gew.-% Glasphase, wobei die Glasphase folgende Zusammensetzung aufweist: 50-90 Gew.-% SiO2; < 2 Gew.-% Fe2O3; 1-25 Gew.-% AI2O3; 0,5-10 Gew.-% TiO2; 0,5-20 Gew.-% R'2O, wobei R' ausgewählt ist aus der Gruppe bestehend aus Li, Na, K, Ru, Cs und Fr; < 0,5 Gew.-% RO, wobei R ausge- wählt ist aus der Gruppe bestehend aus Be, Mg, Ca, Ba und Ra; und < 20 Gew.-% PbO.6. Filter device according to claim 1, characterized in that the filter element has the following composition: 1. 65-95 wt .-% (Al 2 O 3 ■ TiO 2 ); 2. 5-35 wt .-% glass phase, wherein the glass phase has the following composition: 50-90 wt .-% SiO 2 ; <2% by weight Fe 2 O 3 ; 1-25% by weight Al 2 O 3 ; 0.5-10% by weight of TiO 2 ; 0.5-20 wt .-% of R '2 O, where R' is selected from the group consisting of Li, Na, K, Ru, Cs and Fr; <0.5% by weight RO, where R is is selected from the group consisting of Be, Mg, Ca, Ba and Ra; and <20 wt% PbO.
7. Filtereinrichtung nach Anspruch 1 , dadurch gekennzeichnet, dass das Filterelement folgende Zusammensetzung aufweist: 1. 65-95 Gew.-% (AI2O3 ■ ÜO2); 2. 5-35 Gew.-% Glasphase, wobei die Glasphase folgende Zusammensetzung aufweist: 50-90 Gew.-% Siθ2; < 2 Gew.-% Fβ2θ3; 1-25 Gew.-% AI2O3; > 10 Gew.-% ÜO2; 0,5-20 Gew.-% R'20, wobei R' ausgewählt ist aus der Gruppe bestehend aus Li, Na, K, Ru, Cs und Fr; 0,5-20 Gew.-% RO, wobei R ausgewählt ist aus der Gruppe bestehend aus Be, Mg, Ca, Ba und Ra; und < 20 Gew.-% PbO.7. Filter device according to claim 1, characterized in that the filter element has the following composition: 1. 65-95 wt .-% (Al2O3 ■ OO2); 2. 5-35 wt .-% glass phase, wherein the glass phase has the following composition: 50-90 wt .-% SiO 2; <2% by weight of Fβ2θ3; 1-25% by weight of Al 2 O 3; > 10% by weight of O2; 0.5-20% by weight of R'20, wherein R 'is selected from the group consisting of Li, Na, K, Ru, Cs and Fr; 0.5-20% by weight RO, wherein R is selected from the group consisting of Be, Mg, Ca, Ba and Ra; and <20 wt% PbO.
8. Dieselpartikelfilter, bestehend aus einem wabenförmigen Filterelement (18) mit wechselseitig verschlossenen Strömungskanälen, dadurch gekennzeichnet, dass das Filterelement aus Aluminiumtitanat besteht, dem eine Glasphase zugegeben ist und dass die Glasphase aus Borosilikatgläsern oder Bleikristallgläsern besteht.8. diesel particulate filter, consisting of a honeycomb-shaped filter element (18) with mutually closed flow channels, characterized in that the filter element made of aluminum titanate, to which a glass phase is added and that the glass phase consists of borosilicate glasses or lead crystal glass.
9. Dieselpartikelfilter nach Anspruch 8, dadurch gekennzeichnet, dass das Filterelement (18) eine Zusammensetzung nach einem der Ansprüche 2 bis 7 aufweist. 9. Diesel particulate filter according to claim 8, characterized in that the filter element (18) has a composition according to one of claims 2 to 7.
EP09753917A 2008-05-29 2009-05-28 Filter device for removing particles from a gas stream Withdrawn EP2300392A1 (en)

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DE202008007224U DE202008007224U1 (en) 2008-05-29 2008-05-29 Filter device for removing particles from a gas stream
DE202008007223U DE202008007223U1 (en) 2008-05-29 2008-05-29 Filter device for removing particles from a gas stream
PCT/EP2009/056495 WO2009144262A1 (en) 2008-05-29 2009-05-28 Filter device for removing particles from a gas stream

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WO2009144262A1 (en) 2009-12-03
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WO2009144261A1 (en) 2009-12-03
EP2291339A1 (en) 2011-03-09

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