DE3729126A1 - Diesel soot-particle filter and process for the production thereof - Google Patents

Diesel soot-particle filter and process for the production thereof

Info

Publication number
DE3729126A1
DE3729126A1 DE19873729126 DE3729126A DE3729126A1 DE 3729126 A1 DE3729126 A1 DE 3729126A1 DE 19873729126 DE19873729126 DE 19873729126 DE 3729126 A DE3729126 A DE 3729126A DE 3729126 A1 DE3729126 A1 DE 3729126A1
Authority
DE
Germany
Prior art keywords
metal
carrier
oxide
particulate filter
ceramic
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Withdrawn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
DE19873729126
Other languages
German (de)
Inventor
Des Erfinders Auf Nennung Verzicht
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.)
MOTOTECH MOTOREN UMWELTSCHUTZ
Original Assignee
MOTOTECH MOTOREN UMWELTSCHUTZ
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 MOTOTECH MOTOREN UMWELTSCHUTZ filed Critical MOTOTECH MOTOREN UMWELTSCHUTZ
Priority to DE19873729126 priority Critical patent/DE3729126A1/en
Priority to DE19873731889 priority patent/DE3731889A1/en
Publication of DE3729126A1 publication Critical patent/DE3729126A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/009—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone characterised by the material treated
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2027—Metallic material
    • B01D39/2051—Metallic foam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D39/00—Filtering material for liquid or gaseous fluids
    • B01D39/14—Other self-supporting filtering material ; Other filtering material
    • B01D39/20—Other self-supporting filtering material ; Other filtering material of inorganic material, e.g. asbestos paper, metallic filtering material of non-woven wires
    • B01D39/2068—Other inorganic materials, e.g. ceramics
    • B01D39/2093—Ceramic foam
    • 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
    • B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
    • B01J23/20—Vanadium, niobium or tantalum
    • B01J23/22—Vanadium
    • B01J35/56—
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
    • C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
    • C04B41/51—Metallising, e.g. infiltration of sintered ceramic preforms with molten metal
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation
    • C04B41/85—Coating or impregnation with inorganic materials
    • 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
    • C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
    • C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
    • C04B41/81—Coating or impregnation
    • C04B41/85—Coating or impregnation with inorganic materials
    • C04B41/88—Metals
    • 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
    • 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
    • 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
    • F01N3/0228—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 made of foamed rubber or plastics
    • 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
    • F01N3/10—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
    • F01N3/2006—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating
    • F01N3/2013—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means
    • F01N3/2026—Periodically heating or cooling catalytic reactors, e.g. at cold starting or overheating using electric or magnetic heating means directly electrifying the catalyst substrate, i.e. heating the electrically conductive catalyst substrate by joule effect
    • 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
    • F01N3/24—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 constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
    • 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
    • F01N3/24—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 constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
    • F01N3/2807—Metal other than sintered metal
    • 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
    • F01N3/24—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 constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
    • F01N3/2825—Ceramics
    • 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
    • F01N3/24—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 constructional aspects of converting apparatus
    • F01N3/28—Construction of catalytic reactors
    • F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
    • F01N3/2825—Ceramics
    • F01N3/2828—Ceramic multi-channel monoliths, e.g. honeycombs
    • 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
    • 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
    • F01N2250/00—Combinations of different methods of purification
    • F01N2250/02—Combinations of different methods of purification filtering and catalytic conversion
    • 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
    • F01N2330/02—Metallic plates or honeycombs, e.g. superposed or rolled-up corrugated or otherwise deformed sheet metal
    • 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
    • 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
    • F01N2330/12—Metallic wire mesh fabric or knitting
    • 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
    • F01N2330/14—Sintered material
    • 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
    • F01N2330/20—Plastics, e.g. polymers, polyester, polyurethane
    • 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
    • F01N2370/00—Selection of materials for exhaust purification
    • F01N2370/22—Selection of materials for exhaust purification used in non-catalytic purification apparatus
    • 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

Abstract

Diesel soot-particle filter of at least one filter element as support for a catalyst prepared with the use of a metal oxide, characterised in that the support comprises a foamed ceramic or metal body, preferably a ferro-chromium-aluminium alloy, having a pore index of at least 25 PPI, the pore surfaces of which are continuously coated with a metal oxide or a plurality of metal oxides of groups Ib, Vb, VIb, VIIb or of the Fe group of the periodic table of the elements, preferably vanadium pentoxide, as catalytically active material. The catalytically active material, to improve its adhesion to the support, contains aluminium oxide in an amount of up to 30 % by weight, preferably between 5 and 15 % by weight. For the catalytic oxidation of hydrocarbons, it further contains metal mixed oxides, in particular copper chromite, furthermore iron oxide and cobalt oxide and an alkali metal salt or alkaline earth metal salt and/or zirconium dioxide. The preparation is carried out by grinding the materials in the wet state to a maximum particle size of 10 mu m and suspending the product with water, establishing a pH between 5 and 8 until a viscosity of less than 5 cP is achieved, whereupon the foamed ceramic or metal body is impregnated with suspension by dipping and the coating in the pores is stabilised by drying at 110@C and 200@C and heating at up to 700@C.

Description

Die Erfindung geht aus von einem Dieselruß-Partikelfilter gemäß dem Oberbegriff des Patentanspruches 1.The invention is based on a diesel particulate filter according to the Preamble of claim 1.

Es ist bekannt, daß Dieselmotoren neben den auch bei Ottomotoren auftretenden Schadstoffen insbesondere Rußpartikel abscheiden, die infolge ihrer großen Adsorptionsfähigkeit für gebildete krebserzeugende und um­ weltgefährdende Schadstoffe als in hohem Maße gesundheitsschädlich einge­ stuft werden und deren Beseitigung bisher nicht in befriedigendem Maße gelingt. Die wesentliche Ursache hierfür liegt in der hohen Zündtemperatur des Rußes von - je nach betriebsbedingter Zusammensetzung der Partikel - zwischen 500°C und 700°C, die in den Abgasanlagen von Dieselmaschinen erst nach einer längeren Betriebszeit und gelegentlich ohne anderweitige Hilfsmittel, etwa Erhöhung des Treibstoff-Luft-Verhältnisses zum Zwecke der Erhöhung der Abgastemperatur auf die Zündtemperatur des Dieselrußes, Zusatzbrenner oder dergl. überhaupt nicht erreicht wird. Es werden daher zur Vermeidung dieser Nachteile sog. Dieselruß-Partikelfilter eingesetzt, mit denen allerdings aufgrund ihrer Porenstruktur einerseits nur gröbere Rußpartikel aus dem Abgas ausgefiltert werden können und die aufgrund ihrer Verstopfung ebenfalls in periodischen Abständen in der beschriebenen Weise mit allen sich daraus ergebenden Nachteilen freigebrannt werden müssen. It is known that diesel engines in addition to those in gasoline engines separating occurring pollutants in particular soot particles that result their great adsorption capacity for educated carcinogens and around pollutants that are hazardous to the world are considered to be highly harmful to health are classified and their removal has not been satisfactory to date succeed. The main reason for this is the high ignition temperature the soot of - depending on the operational composition of the particles - between 500 ° C and 700 ° C that in the exhaust systems of diesel engines only after a long period of operation and occasionally without other Tools, such as increasing the air-fuel ratio for the purpose increasing the exhaust gas temperature to the ignition temperature of the diesel soot, Additional burner or the like. Is not reached at all. Therefore it will so-called diesel soot particle filters are used to avoid these disadvantages, with which, however, on the one hand only coarser due to their pore structure Soot particles can be filtered out of the exhaust gas and because of their constipation also periodically in the described Way with all the resulting disadvantages have to.  

Zur Verbesserung der Abbrennbedingungen ist es hierbei bekannt, dem Filter einen die Zündtemperatur senkenden Katalysator vorzuschalten, bezw. die Stirnfläche des Filters mit Katalysatormaterial zu beschichten. Hier­ durch kann zwar die angestrebte Senkung der Zündtemperatur, nicht jedoch eine zufriedenstellende, d. h. vollständige Verbrennung des Rußes, und zwar weder des anströmenden noch des in dem nachgeschalteten Filter während der Beladungsphase gesammelten Rußes erreicht werden, es hat sich vielmehr gezeigt, daß auf diese Weise teilweise eine Verflüchtigung und gege­ benenfalls sogar Abspaltung von flüchtigen Kohlenwasserstoffen eintritt.To improve the burning conditions, it is known that Filter upstream of a catalyst that lowers the ignition temperature. coat the face of the filter with catalyst material. Here the desired lowering of the ignition temperature can, however, not a satisfactory, d. H. complete combustion of the soot, namely neither the inflowing nor in the downstream filter during the Loading phase of collected soot can be achieved, it has rather shown that in this way partially volatilization and counter if necessary, even elimination of volatile hydrocarbons occurs.

Zur Beseitigung dieser Nachteile ist es aus der DE-PS 34 07 172 be­ kannt, mehrere Filterelemente dieser Art abwechselnd hintereinander anzu­ ordnen, deren Stirnflächen jeweils abswechselnd mit einem die Zündtempe­ ratur für Dieselruß senkenden und einem die Oxidation von Kohlenwasser­ stoffen fördernden Katalysator beschichtet sind. Hierbei dient als zünd­ temperatursenkendes Katalysatormaterial Vanadiumpentoxid in Mischung mit einem beliebigen Metalloxid oder mehreren solchen Metalloxiden und als Oxidationskatalysator für Kohlenwasserstoffe ein Element der Platingruppe oder mehrere Elemente dieser Gruppe, gegebenenfalls zusammen mit einem anderen - unedlen - Metall. Die bekannte Einrichtung führt ebenfalls nicht zu einem befriedigenden Ergebnis. Einerseits verursacht sie aufgrund der mehrfachen Hintereinanderschaltung von Filterkörpern mit unterschiedlicher katalytischer Beschichtung einen erheblichen Aufwand und erfordert da­ rüber hinaus einen erheblichen, häufig nicht zur Verfügung stehenden Raum­ bedarf. Darüber hinaus kann mit dieser Einrichtung das wesentliche Problem, nämlich die vollständige Beseitigung des gebildeten Rußes in allen Be­ triebszuständen, d. h. nicht nur während des allgemeinen Fahrbetriebes son­ dern auch bereits in der Anfahrphase nicht gelöst werden. Es können auch in diesem Falle insbesondere in der Anfahrphase und in den Rußsammel­ phasen die kleineren Rußpartikel nicht erfaßt werden und es ist ebenfalls periodisch eine Temperaturerhöhung unter Zuhilfenahme anderweitiger Hilfs­ mittel erforderlich.To eliminate these disadvantages, it is from DE-PS 34 07 172 be knows to alternately turn on several filter elements of this type arrange, the end faces alternating with the ignition temperature Ratur for diesel soot and the oxidation of hydrocarbons promoting catalyst are coated. This serves as the ignition temperature-reducing catalyst material vanadium pentoxide mixed with any metal oxide or several such metal oxides and as Oxidation catalyst for hydrocarbons an element of the platinum group or several elements of this group, optionally together with one other - base - metal. The known device does not lead either to a satisfactory result. On the one hand, it causes due to the multiple series connection of filter bodies with different Catalytic coating requires a lot of effort in addition, a considerable, often unavailable space requirement. In addition, with this facility, the essential problem namely the complete removal of the soot formed in all Be  driving states, d. H. not only during general driving operations cannot be solved even in the start-up phase. It can too in this case especially in the start-up phase and in the soot collection phase the smaller soot particles are not detected and it is also periodically a temperature increase with the help of other aids medium required.

Der vorliegenden Erfindung liegt als Aufgabe die Schaffung eines Die­ selruß-Partikelfilters zugrunde, mit dessen Hilfe eine vollständige Nach­ verbrennung des in einer Dieselbrennkraftmaschine gebildeten Rußes erzielt werden kann. Diese Aufgabe wird mit einem Filter mit den im Patentanspruch 1 wiedergegebenen Merkmalen gelöst.The present invention has for its object to provide a selruß particle filter, with whose help a complete after combustion of the soot formed in a diesel engine can be. This object is achieved with a filter with the in claim 1 reproduced characteristics solved.

Mit Hilfe des erfindungsgemäßen Filters werden die Dieselruß-Partikel auch der kleinsten Partikelgröße zuverlässig aufgefangen, so daß die über die Abgase bereits in der Anfahrphase des Motors absolut rußfrei in die Atmosphäre abgegeben werden. Hierbei hat sich gezeigt, daß - zum Unter­ schied zu den bekannten, lediglich stirnflächenbeschichteten Filterkörpern - aufgrund der durchgängigen Beschichtung der Poren eine erheblich Absen­ kung der Zündtemperatur für Dieselruß auf etwa 350°C, d. h. eine im norma­ len Fahrbetrieb vom Abgas erreichte Zündtemperatur erzielt wird, so daß es bereits nach kurzer Zeit zu einem Freibrennen des in der Anfahrphase mit Dieselrußpartikeln beladenen Filters und danach zu einer kontinuierlichen Verbrennung der sich absetzenden Rußpartikel kommt. Durch die Wahl geeigneter Zusätze zu dem katalytisch wirksamen Material kann hierbei auch eine vollständige Oxidierung der vorhandenen und der sich gegebenenfalls bei der Rußverbrennung bildenden Kohlenwasserstoffe erzielt werden.With the help of the filter according to the invention, the diesel soot particles even the smallest particle size reliably collected, so that the over the exhaust gases are already soot-free in the start-up phase of the engine Atmosphere. It has been shown that - to the sub differed from the known, only face-coated filter bodies - Due to the continuous coating of the pores, a significant absence kung the ignition temperature for diesel soot to about 350 ° C, d. H. one in norma len driving operation of the exhaust gas reached ignition temperature is achieved so that it after a short time to a free burn in the start-up phase Diesel soot particles loaded filter and then to a continuous Combustion of the soot particles settling comes. By choice Suitable additives to the catalytically active material can also be used here  a complete oxidation of the existing and, if necessary, the hydrocarbons forming in the combustion of soot.

Als Träger kann jeder beliebige bekannte Träger verwendet werden. Be­ sonders vorteilhaft kommen jedoch Träger aus geschäumtem Keramikmaterial und geschäumtem Metall zum Einsatz, die mit der erforderlichen Porenfein­ heit und Festigkeit hergestellt werden können, wobei insbesondere mit ge­ schäumten Metallkörpern aus einer Ferro-Chrom-Aluminium-Legierung in Form einer Ronde, d. i. ein mit einer axialen Blind- oder Sacklochbohrung ver­ sehener stabförmiger Körper zum Einsatz kommen, die frei in einen Reak­ tionsraum (Auspufftopf) einbringbar und an deren offene Seite die Gasab­ führung unmittelbar anschließbar ist.Any known carrier can be used as the carrier. Be However, supports made of foamed ceramic material are particularly advantageous and foamed metal for use, which have the required fine pores unit and strength can be produced, in particular with ge foamed metal bodies made of a ferro-chrome-aluminum alloy in the form a round blank, d. i. one with an axial blind or blind hole see rod-shaped body are used, which freely in a reak tion space (muffler) can be introduced and on the open side the gas exhaust leadership is immediately connectable.

In einer weiteren Ausführungsform der Erfindung kann dem katalytisch wirksamen Material zur Verbesserung seiner Haftung auf dem Träger Alumi­ niumoxid und/oder Aluminiumhydroxid und/oder Titandioxid und/oder Sili­ ziumdioxid in einer Menge bis zu 30 Gew.-%, vorzugsweise zwischen 5 und 15 Gew.-%, bezogen auf die Menge des Vanadiumpentoxids, zugesetzt sein, wobei bei gemeinsamen Einsatz der Aluminiumverbindungen das Aluminiumoxid und Aluminiumhydroxid zweckmäßig zu etwa gleichen Teilen verwendet werden. Es wird auf diese Weise insbesondere bei den schwierigen metallischen Trä­ gern, beispielsweise einem aus einer Ferro-Chrom-Aluminium-Legierung be­ stehenden geschäumten Träger - jedoch nicht nur bei diesen - eine ausge­ zeichnete Bindung des katalytisch wirksamen Materials auf dem Träger erzielt. In a further embodiment of the invention, this can be catalytic effective material to improve its adhesion to the Alumi carrier nium oxide and / or aluminum hydroxide and / or titanium dioxide and / or sili Ziumdioxid in an amount up to 30 wt .-%, preferably between 5 and 15 % By weight, based on the amount of vanadium pentoxide, may be added, where when the aluminum compounds are used together, the aluminum oxide and Aluminum hydroxide can be used in approximately equal parts. It is particularly useful for difficult metallic gears like, for example, be made of a ferro-chrome-aluminum alloy standing foamed carrier - but not only for these - one out signed binding of the catalytically active material on the support achieved.  

Es enthält das katalytisch wirksame Material weiterhin vorteilhaft zum Zwecke der katalytischen Oxidation der sich im Motor und gegebenenfalls bei der Nachverbrennung bildenden Kohlenwasserstoffe Mischoxide oder Spinelle des Kupfers, Chroms und Mangans, insbesondere Kupferchromit, in einer Menge bis zu 20 Gew.-%, vorzugsweise 2 bis 10 Gew.-%, weiterhin Eisenoxid und Kobaltoxid in einer Menge von jeweils bis zu 10 Gew.-% und als Aktivator bezw. Promotor Zirkondioxid und/oder ein Alkali- oder Erd­ alkalisalz in einer Menge bis zu 10 Gew.-%, vorzugsweise zwischen 1 und 5 Gew.-%, jeweils bezogen auf die Gesamtmenge des katalytisch wirksamen Ma­ terials. Hierbei kommen als Aktivator bezw. Promotor vorteilhaft Natrium­ carbonat, Kaliumcarbonat oder Kaliumsulfat, zum Einsatz.It also contains the catalytically active material advantageously for Purpose of catalytic oxidation in the engine and possibly mixed oxides or hydrocarbons forming in the afterburning Spinels of copper, chromium and manganese, especially copper chromite, in an amount up to 20 wt .-%, preferably 2 to 10 wt .-%, further Iron oxide and cobalt oxide in an amount of up to 10% by weight each and as an activator or Zirconia promoter and / or an alkali or earth alkali salt in an amount of up to 10% by weight, preferably between 1 and 5 % By weight, in each case based on the total amount of the catalytically active Ma terials. Here come as an activator. Promoter beneficial sodium carbonate, potassium carbonate or potassium sulfate.

In einer besonders vorteilhaften Ausführungsform der Erfindung kann der Träger aus elektrisch leitendem Material mit hohem elektrischem Wider­ stand, beispielsweise aus elektrisch leitendem Keramikmaterial, Ferro- Chrom-Aluminium-Legierung oder dergl. bestehen oder auf zumindest einem Teil seiner Porenflächen mit einer Beschichtung aus einem Leitermaterial mit hohem elektrischen Widerstand versehen sein, wobei der in diesem Falle als Heizelement heranziehbare Körper bezw. die Beschichtung mit einer Stromquelle, beispielsweise der Fahrzeugbatterie, einer Lichtmaschine oder einem Solar-Panel, verbindbar ist. Es kann auf diese Weise durch Fremdbe­ heizung des Katalysatorträgers das frühzeitige Erreichen und die dauer­ hafte Aufrechterhaltung der Zündtemperatur auch bei ungünstigen Betriebs­ zuständen und damit eine sichere katalytische Nachverbrennung des Die­ selrußes gewährleistet werden. In a particularly advantageous embodiment of the invention the carrier made of electrically conductive material with high electrical resistance stand, for example made of electrically conductive ceramic material, ferro- Chromium-aluminum alloy or the like. Consist or on at least one Part of its pore surface with a coating of a conductor material be provided with high electrical resistance, which in this case body that can be used as a heating element. the coating with a Power source, for example the vehicle battery, an alternator or a solar panel that can be connected. It can be done this way by strangers heating of the catalyst carrier reaching early and the duration maintaining the ignition temperature even under unfavorable conditions conditions and thus safe catalytic afterburning of the die be guaranteed.  

Die Herstellung des vorstehend beschriebenen Dieselruß-Partikel-Fil­ ters erfolgt erfindungsgemäß in der Weise, daß die das katalytisch wirk­ same Material bildenden Substanzen in der Nässe auf eine Korngröße von max. 10 µm aufgemahlen und mit Wasser unter Einstellung eines pH-Wertes zwi­ schen 5 und 8 bis zur Erreichung einer Viskosität von weniter als 5 cP aufgeschlämmt werden, worauf der Schaumkeramik- bezw. Metallkörper durch Eintauchen mit Schlämme getränkt und die so gebildete Beschichtung in den Poren durch Trocknung bei 110° und 200°C sowie Tempern bei bis zu 700°C stabilisiert wird. Es ist auf diese Weise erstmals ein Verfahren geschaffen, mit dessen Hilfe die durchgängige Feststoffbeschichtung des Porenschaumes von Filterkörpern mit der angegebenen Feinheit erzielt werden kann. Hierbei wird zweckmäßig während des Mahl- und Dispergiervorganges eine Temperatur von unter 40°C eingehalten, wodurch in Verbindung mit der Einhaltung des angegebenen pH-Wertes eine vorzeitige Gelierung, d. h. unerwünschte Erhöhung der Viskosität der Schlämme, durch die ein Eindrin­ gen in das Innere des Filterkörpers ausgeschlossen würde, verhindert wer­ den kann. Darüber hinaus wird durch eine systemgerechte Einstellung des pH-Wertes eine Sedimentierung der Aufschlämmung, die zu einer ungleichför­ migen Beschichtung führen würde, verhindert. Erforderlichenfalls kann zur Erzielung einer ausreichenden Beschichtungsdicke der Tauch- und Trock­ nungsvorgang vor dem Tempern mehrfach wiederholt werden.The production of the diesel particulate film described above ters takes place according to the invention in such a way that the catalytically active same material-forming substances in the wet to a grain size of max. 10 µm ground and with water with a pH between two 5 and 8 until a viscosity of less than 5 cP is reached be slurried, whereupon the foam ceramic or Metal body impregnated with sludge and the coating thus formed in the pores by drying at 110 ° and 200 ° C and annealing at up to 700 ° C is stabilized. It is a process for the first time in this way created with the help of the continuous solid coating of the Pore foam of filter bodies can be achieved with the specified fineness can. This is useful during the grinding and dispersing process a temperature of below 40 ° C is maintained, which in connection with the Adherence to the stated pH value means premature gelation, d. H. undesirable increase in the viscosity of the sludge, due to penetration who would be excluded from inside the filter body that can. In addition, a system-compatible setting of the pH a sedimentation of the slurry, which leads to an uneven would prevent coating. If necessary, can Achieving a sufficient coating thickness of the dipping and drying ning process can be repeated several times before annealing.

Die Herstellung des Trägers erfolgt in Abhängigkeit von seinem kon­ struktiven Aufbau der eingesetzten Materialien in unterschiedlicher Weise, so etwa die die Herstellung eines durchgängig leitenden Metall- oder Kera­ mikschaumträgers in der Weise, daß ein der gewünschten Form entsprechender Körper aus Polyurethan hergestellt und anschließend unter Vermittlung eines Klebers mit einer pulverförmigen Beschichtung aus einem metallischen oder keramischen Leitermaterial mit hohem elektrischem Widerstand versehen wird, worauf der gebildete Körper getrocknet sowie zum Zwecke einerseits der Verdampfung des Polyurethans und andererseits der Sinterung der Be­ schichtung aus einem festen Gerüst einer Wärmebehandlung unterworfen wird. Hierbei kann selbstverständlich anstelle eines Modelles aus Polyurethan auch Modell aus leitendem oder nichtleitendem Keramikschaum eingesetzt werden, der in diesem Falle jedoch bei der Wärmebehandlung nicht zerstört wird sondern Teil des Katalysators bleibt.The carrier is produced depending on its con structural construction of the materials used in different ways, such as the manufacture of a continuously conductive metal or kera microfoam carrier in such a way that one of the desired shape  Body made of polyurethane and then mediated an adhesive with a powder coating of a metallic or ceramic conductor material with high electrical resistance is what the formed body is dried on the one hand and for the purpose on the other the evaporation of the polyurethane and on the other hand the sintering of the Be layering from a solid framework is subjected to a heat treatment. Here, of course, instead of a model made of polyurethane also model made of conductive or non-conductive ceramic foam are not destroyed in the heat treatment in this case but remains part of the catalyst.

In einer anderen Ausführungsform kann der Träger auch durch galvani­ sche Beschichtung eines gewünschten Form entsprechender Körper aus Poly­ urethanschaum mit einer Chrom-Nickel-Beschichtung und anschließende Ver­ dampfung des Polyurethanmodells hergestellt werden, ebenso wie die Her­ stellung durch Mischung von Polyurethanmaterial mit pulverförmiger Ferro- Chrom-Aluminium-Legierung und Aufschäumung der Mischung zu einem der ge­ wünschten Form entsprechenden Körper hergestellt werden kann, der an­ schließend getrocknet und zum Zwecke der Verdampfung des Polyurethans und der Sinterung des verbleibenden Metallgerüstes einer Wärmebehandlung un­ terworfen wird.In another embodiment, the carrier can also by galvanic cal coating of a desired shape corresponding body made of poly urethane foam with a chrome-nickel coating and subsequent Ver damping of the polyurethane model can be produced, as well as the Her position by mixing polyurethane material with powdered ferro- Chromium-aluminum alloy and foaming of the mixture to one of the ge Desired shape corresponding body can be made to the finally dried and for the purpose of evaporation of the polyurethane and the sintering of the remaining metal structure of a heat treatment is thrown.

Claims (15)

1. Dieselruß-Partikelfilter, bestehend aus mindestens einem Filterele­ ment als Träger für einen unter Verwendung von mindestens einem Metalloxid hergestellten Katalysator, dadurch gekennzeichnet, daß der Träger aus ei­ nem Keramik- oder Metallschaumkörper, vorzugsweise aus einer Ferro-Chrom- Aluminium-Legierung, mit einer Porenzahl von mindestens 25 PPI besteht, dessen Porenflächen durchgängig mit einem Metalloxid oder mehreren Metall­ oxiden der Gruppen Ib, Vb, VIb, VIIb oder der Fe-Gruppen des periodischen Systems, vorzugsweise Vanadinpentoxid, als katalytisch wirksames Material beschichtet sind.1. Diesel particulate filter consisting of at least one Filterele element as a carrier for a catalyst produced using at least one metal oxide, characterized in that the carrier made of egg nem ceramic or metal foam body, preferably of a ferro-chromium-aluminum alloy, with a pore number of at least 25 PPI, the pore surfaces are continuously coated with a metal oxide or more metal oxides of groups Ib, Vb, VIb, VIIb or the Fe groups of the periodic system, preferably vanadium pentoxide, as a catalytically active material. 2. Dieselruß-Partikelfilter nach Anspruch 1, dadurch gekennzeichnet, daß das katalytisch wirksame Material zur Verbesserung der Haftwirkung Aluminiumoxid und/oder Aluminiumhydroxid und/oder Titandioxid und/oder Siliziumdioxid in einer Menge bis zu 30 Gew.-%, vorzugsweise zwischen 5 und 15 Gew.-%, bezogen auf die Menge das Vanadinpentoxids, enthält.2. Diesel soot particle filter according to claim 1, characterized in that that the catalytically active material to improve the adhesive effect Aluminum oxide and / or aluminum hydroxide and / or titanium dioxide and / or Silicon dioxide in an amount of up to 30% by weight, preferably between 5 and 15% by weight based on the amount of the vanadium pentoxide. 3. Dieselruß-Partikelfilter nach Anspruch 2, dadurch gekennzeichnet, daß in der Matrix Aluminiumoxid und Aluminiumhydroxid zu etwa gleichen Teilen enthalten sind. 3. Diesel particulate filter according to claim 2, characterized in that in the matrix aluminum oxide and aluminum hydroxide to about the same Parts are included.   4. Dieselruß-Partikelfilter nach Anspruch 1 und 3, dadurch gekenn­ zeichnet, daß das katalytisch aktive Material Mischoxide oder Spinelle des Kupfers, Chrom und Mangans, insbesondere Kupferchromit, in einer Menge bis zu 20 Gew.-%, vorzugsweise 2 bis 10 Gew.-%, weiterhin Eisenoxid und Kobaltoxid in einer Menge von jeweils bis zu 10 Gew.-% und als Akti­ vator bezw. Promotor Zirkondioxid und/oder ein Alkali- oder Erdalkalisalz in einer Menge bis zu 10 Gew.-%, vorzugsweise zwischen 1 und 5 Gew.-%, jeweils bezogen auf die Gesamtmenge des katalytisch wirksamen Materials, enthält.4. Diesel particulate filter according to claim 1 and 3, characterized records that the catalytically active material mixed oxides or spinels of copper, chromium and manganese, in particular copper chromite, in one Amount up to 20 wt .-%, preferably 2 to 10 wt .-%, further iron oxide and cobalt oxide in an amount of up to 10 wt .-% and as Akti vator or Zirconia promoter and / or an alkali or alkaline earth salt in an amount up to 10% by weight, preferably between 1 and 5% by weight, in each case based on the total amount of the catalytically active material, contains. 5. Dieselruß-Partikelfilter nach Anspruch 4, dadurch gekennzeichnet, daß das in dem katalytisch wirksamen Material enthaltene Alkalimetallsalz aus Natriumcarbonat, Kaliumcarbonat oder Kaliumdisulfat besteht.5. Diesel particulate filter according to claim 4, characterized in that the alkali metal salt contained in the catalytically active material consists of sodium carbonate, potassium carbonate or potassium disulfate. 6. Dieselruß-Partikelfilter nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, daß der Träger, insbesondere der geschäumte Keramik- bezw. Metallkörper in Form einer Ronde (mit einer axialen Blind- oder Sackloch­ bohrung versehener stabförmiger Körper) aufweist, die frei in einem Reak­ tionsraum (Auspufftopf) einbringbar und an deren offene Seite die Gaszu- bezw. Gasabführung unmittelbar anschließbar ist.6. Diesel particulate filter according to one of claims 1 to 5, characterized characterized in that the carrier, in particular the foamed ceramic or. Metal body in the form of a round blank (with an axial blind or blind hole bore provided rod-shaped body), which freely in a reak tion space (muffler) can be introduced and on the open side the gas supply respectively. Gas discharge can be connected immediately. 7. Dieselruß-Partikelfilter nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der Träger aus elektrisch leitendem Material mit hohem elektrischem Widerstand, beispielsweise aus elektrisch leitendem Keramik­ material, Ferro-Chrom-Aluminium-Legierung oder dergl. besteht und mit einer Stromquelle, beispielsweise der Fahrzeugbatterie, einer Lichtma­ schine oder einem Solar-Panel, verbindbar ist.7. Diesel particulate filter according to one of claims 1 to 6, characterized characterized in that the carrier made of electrically conductive material with high electrical resistance, for example made of electrically conductive ceramic material, ferro-chrome-aluminum alloy or the like  a power source, for example the vehicle battery, a Lichtma machine or a solar panel, can be connected. 8. Dieselruß-Partikelfilter nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, daß der Träger auf wenigstens einem Teil seiner Porenflä­ che mit einer Beschichtung aus einem Leitermaterial mit hohem elektri­ schem Widerstand als Heizelement versehen sind und die Schicht mit einer Stromquelle, beispielsweise der Fahrzeugbatterie, einer Lichtmaschine oder einem Solar-Panel, verbindbar ist.8. Diesel particulate filter according to one of claims 1 to 6, characterized characterized in that the carrier on at least part of its pore area surface with a coating of a conductor material with high electri are provided as a heating element and the layer with a Power source, for example the vehicle battery, an alternator or a solar panel that can be connected. 9. Verfahren zur Herstellung eines Dieselruß-Partikel-Filters nach einem der Ansprüche 1 bis 8, dadurch gekennzeichnet, daß die das kataly­ tisch wirksame Material bildenden Substanzen in der Nässe auf eine Korn­ größe von max. 10 µm aufgemahlen und danach mit Wasser unter Einstellung eines pH-Wertes zwischen 5 und 8 bis zur Erreichung einer Viskosität von weniger als 5 cP aufgeschlämmt werden, worauf der Schaumkeramik- bezw. Metallkörper durch Eintauchen in die Schlämme getränkt und die hierdurch gebildete Beschichtung in den Poren durch Trocknung bei 110° und 200°C sowie Tempern bei bis zu 700°C stabilisiert wird.9. Process for the production of a diesel particulate filter one of claims 1 to 8, characterized in that the the cataly Table-forming material-forming substances in the wet on a grain size of max. Ground 10 µm and then with water with adjustment pH between 5 and 8 until a viscosity of less than 5 cP are slurried, whereupon the foam ceramic or Metal body impregnated by immersion in the sludge and this Coating formed in the pores by drying at 110 ° and 200 ° C. and tempering is stabilized at up to 700 ° C. 10. Verfahren nach Anspruch 9, dadurch gekennzeichnet, daß die Schlämme während des Mahl- und Dispergiervorganges auf einer Temperatur von unter 40°C gehalten wird.10. The method according to claim 9, characterized in that the sludge during the grinding and dispersing process at a temperature below 40 ° C is maintained. 11. Verfahren nach einem der Ansprüche 9 bis 10, dadurch gekennzeich­ net, daß der Tauch- und Trocknungsvorgang vor dem Tempern mehrfach wieder­ holt wird. 11. The method according to any one of claims 9 to 10, characterized in net that the dipping and drying process before annealing several times again is fetched.   12. Verfahren nach einem der Ansprüche 9 bis 11, dadurch gekennzeich­ net, daß zur Herstellung des Trägers ein der gewünschten Form entsprechen­ der Körper aus Polyurethan hergestellt und anschließend unter Vermittlung eines Klebers mit einer pulverförmigen Beschichtung aus einem metallischen oder keramischen Leitmaterial mit hohem elektrischen Widerstand versehen wird, worauf der so gebildete Körper getrocknet sowie zum Zwecke einer­ seits der Verdampfung des Polyurethans und andererseits der Sinterung des verbleibenden metallischen Beschichtung zu einem festen Gerüst einer Wärmebehandlung unterworfen wird.12. The method according to any one of claims 9 to 11, characterized in net that correspond to the desired shape for the preparation of the carrier the body is made of polyurethane and then mediated an adhesive with a powder coating of a metallic or ceramic conductive material with high electrical resistance is, whereupon the body thus formed is dried and for the purpose of a because of the evaporation of the polyurethane and the sintering of the remaining metallic coating to form a solid framework Is subjected to heat treatment. 13. Verfahren nach einem der Ansprüche 9 bis 11, dadurch gekennzeich­ net, daß zur Herstellung des Trägers ein der gewünschten Form entsprechen­ der Körper aus Keramikschaum hergestellt und anschließend unter Ver­ mittlung eines Klebers mit einer pulverförmigen Beschichtung aus einem me­ tallischen oder keramischen Leitermaterial mit hohem elektrischem Wider­ stand versehen wird, worauf der so gebildete Körper getrocknet bezw. zum Zwecke der Sinterung einer Wärmebehandlung unterworfen wird.13. The method according to any one of claims 9 to 11, characterized in net that correspond to the desired shape for the preparation of the carrier the body made of ceramic foam and then under Ver averaging an adhesive with a powder coating from a me metallic or ceramic conductor material with high electrical resistance was provided, whereupon the body thus formed or dried. to the Is subjected to a heat treatment for the purpose of sintering. 14. Verfahren nach einem der Ansprüche 9 bis 11, dadurch gekennzeich­ net, daß zur Herstellung des Trägers ein der gewünschten Form entsprechen­ der Körper aus Polyurethanschaum hergestellt und anschließend mit Hilfe eines Chrom-Nickel-Elektrolyten galvanisch mit einer Chrom-Nickel-Be­ schichtung als elektrisches Widerstandsmaterial versehen wird, worauf durch Temperaturbehandlung bei etwa 300° bis 500°C der Polyurethanschaum verdampft wird. 14. The method according to any one of claims 9 to 11, characterized in net that correspond to the desired shape for the preparation of the carrier the body made of polyurethane foam and then with the help a chrome-nickel electrolyte galvanically with a chrome-nickel coating Layering is provided as an electrical resistance material, whereupon by heat treatment at about 300 ° to 500 ° C the polyurethane foam is evaporated.   15. Verfahren nach einem der Ansprüche 9 bis 11, dadurch gekennzeich­ net, daß zur Herstellung des Trägers Polyurethanmaterial mit pulverför­ miger Ferro-Chrom-Aluminium-Legierung gemischt und zu einem der gewünsch­ ten Form entsprechenden Körper geschäumt wird, worauf der gebildete Körper getrocknet und zum Zwecke der Verdampfung des Polyurethans und der Sinte­ rung des verbleibenden Metallgerüstes einer Wärmebehandlung unterworfen wird.15. The method according to any one of claims 9 to 11, characterized in net that for the preparation of the carrier polyurethane material with powder miger ferro-chrome-aluminum alloy mixed and to one of the desired th form corresponding body is foamed, after which the formed body dried and for the purpose of evaporation of the polyurethane and the sine tion of the remaining metal structure is subjected to a heat treatment becomes.
DE19873729126 1987-09-01 1987-09-01 Diesel soot-particle filter and process for the production thereof Withdrawn DE3729126A1 (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
DE19873729126 DE3729126A1 (en) 1987-09-01 1987-09-01 Diesel soot-particle filter and process for the production thereof
DE19873731889 DE3731889A1 (en) 1987-09-01 1987-09-23 Diesel soot particle filter and process for the production thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19873729126 DE3729126A1 (en) 1987-09-01 1987-09-01 Diesel soot-particle filter and process for the production thereof

Publications (1)

Publication Number Publication Date
DE3729126A1 true DE3729126A1 (en) 1989-04-06

Family

ID=6334941

Family Applications (1)

Application Number Title Priority Date Filing Date
DE19873729126 Withdrawn DE3729126A1 (en) 1987-09-01 1987-09-01 Diesel soot-particle filter and process for the production thereof

Country Status (1)

Country Link
DE (1) DE3729126A1 (en)

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3941698A1 (en) * 1989-12-18 1991-06-20 Daimler Benz Ag Soot filter
DE3941516A1 (en) * 1989-07-20 1991-06-20 Honda Motor Co Ltd SINTERED CERAMIC ARTICLES AND METHOD FOR THE PRODUCTION THEREOF
DE4134783A1 (en) * 1991-10-22 1993-04-29 Bosch Gmbh Robert Electroconductive porous inorganic material used as filter or sensor - contains porous inorganic substance, pref. aluminosilicate or aluminium phosphate, and semiconducting metal oxide, pref. tin di:oxide, carbon di:oxide and/or zinc oxide
DE4229471A1 (en) * 1992-09-03 1994-03-10 Man Nutzfahrzeuge Ag Process for the purification of exhaust gases from diesel engines
DE4329558A1 (en) * 1993-09-02 1995-03-09 Friedrich Dr Ing Sperling Soot filter for diesel engines
WO1995024270A1 (en) * 1994-03-08 1995-09-14 Engelhard Corporation Thermal stress resistant monolithic catalyst
EP0727248A1 (en) * 1995-02-17 1996-08-21 ICT Co., Ltd. Catalyst for purification of diesel engine exhaust gas
WO1997032119A1 (en) * 1996-02-27 1997-09-04 Astro Met, Inc. Catalytic converter for exhaust gases having a high surface area catalytic core element
DE19809976A1 (en) * 1998-03-09 1999-09-16 Heimbach Gmbh Thomas Josef Shaped bodies made of an electrically conductive ceramic and method for producing contact areas on such shaped bodies
WO2000003790A1 (en) * 1998-07-15 2000-01-27 Redem Corporation Self-regenerating oxidation catalyst for treating diesel engine exhaust gases
DE10160639A1 (en) * 2001-12-08 2003-06-26 Fraunhofer Ges Forschung Exhaust gas treatment system for diesel and direct fuel injection petrol engines, passes gases through open-pore ceramic foam with locally-varied pore structure
EP1515012A1 (en) * 2003-09-11 2005-03-16 PS Unternehmensbeteiligungs GmbH Device for elimination of carbon black particulates from an exhaust gas stream of an internal combustion engine
DE10346281B4 (en) * 2003-09-30 2006-06-22 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Method for producing components with a nickel-based alloy and components produced therewith
DE102005002687A1 (en) * 2005-01-20 2006-07-27 Hjs Fahrzeugtechnik Gmbh & Co. Kg Coating inflow side of filter body, especially to apply catalytic coating to particle filter for combustion engine exhaust gas, comprises immersion using counter-pressure to inhibit penetration to outflow side
WO2006091135A1 (en) * 2005-02-24 2006-08-31 Volvo Technology Corporation Particulate filter comprising first and second bodies arranged to create turbulance in a gas flow
AT501463B1 (en) * 2005-05-04 2006-09-15 Pankl Emission Control Systems Device for removing soot particles from exhaust gas of diesel motor vehicle, comprises catalyst element for partial oxidation of nitrogen monoxide to nitrogen dioxide and particle filter arranged below catalyst element
WO2007078855A1 (en) * 2005-12-22 2007-07-12 Basf Catalysts Llc Exhaust inlet metallic foam trap coupled to a downstream monolithic precious metal catalyst
WO2007147669A1 (en) * 2006-06-22 2007-12-27 Robert Bosch Gmbh Filter for purifying a gas flow containing particles and method for the production thereof
DE102009049732A1 (en) * 2009-10-19 2011-04-21 Alantum Europe Gmbh Filter element for removing hydrocarbons from exhaust air, has heating mechanism for heating metal foam element, and regulation device regulating heating mechanism such that foam element is held at target temperature
DE102009015176A1 (en) 2009-03-20 2011-07-14 Alantum Corporation, Kyonggi Open-porous metal foam body consists of iron based alloy chromium and aluminum, where the foam body is gas-tightly formed
US20130247408A1 (en) * 2005-05-16 2013-09-26 Grain Processing Corporation Method for Drying Spent Filter Media
US9169763B2 (en) 2011-04-11 2015-10-27 GM Global Technology Operations LLC System and method for solar-powered control of exhaust after-treatment systems
DE102014011678A1 (en) * 2014-08-05 2016-02-11 Bwf Tec Gmbh & Co. Kg Filter candle element with metal foam reinforcement
CN108745338A (en) * 2018-06-15 2018-11-06 太原理工大学 Magnesium aluminate spinel base medium temperature hydrolytic catalyst of carbonyl sulfur and preparation method
CN114130118A (en) * 2021-10-19 2022-03-04 安徽元琛环保科技股份有限公司 Preparation method and application of three-in-one filtering material for denitration, dioxin removal and dust removal

Citations (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE953753C (en) * 1952-03-26 1956-12-06 August Ahrens Silencer for internal combustion engines
DE1717174A1 (en) * 1964-04-14 1972-04-13 Texaco Development Corp Catalyst structures for treating gases
DE2233187A1 (en) * 1971-07-20 1973-02-08 Grace W R & Co EMISSION DETOXIFICATION CATALYST
DE2304351A1 (en) * 1973-01-30 1974-08-01 Kali Chemie Ag Catalyst-coated metal structures for exhaust gas purifcn.
DE2360266A1 (en) * 1973-04-30 1974-11-07 Universal Oil Prod Co FULL METAL CATALYST ELEMENT
DE2453358A1 (en) * 1973-11-12 1975-05-15 Int Nickel Ltd CATALYST FOR PURIFYING GASES
DE2355498A1 (en) * 1973-11-07 1975-06-05 Hoechst Ag METHOD OF MANUFACTURING A SPONGE-LIKE CERAMIC BODY
DE2622319A1 (en) * 1975-05-23 1976-12-09 Eznpk Chimia I Chimikotechnits CATALYST FOR THE RESTORING OF ENGINE EXHAUST GASES, IN PARTICULAR DIESEL AND PETROL ENGINES
DE2624686A1 (en) * 1975-06-04 1976-12-23 Ass Octel EXHAUST GAS FILTERS FOR COMBUSTION MACHINERY
DE2641059A1 (en) * 1975-09-12 1977-03-31 Int Nickel Ltd METHOD OF MANUFACTURING A CATALYST FOR PURIFYING GASES
DE2359771B2 (en) * 1972-11-30 1978-05-03 Nippon Shokubai Kagaku Kogyo Co. Ltd., Osaka (Japan) Process for the production of a noble metal supported catalyst
DE2745188A1 (en) * 1977-10-07 1979-04-12 Degussa SHAPED CATALYST, METHOD FOR ITS MANUFACTURING AND USE
DE3149960A1 (en) * 1981-01-27 1982-09-02 W.R. Grace & Co., 10036 New York, N.Y. COMPOSITION AND METHOD FOR TREATING EXHAUST GAS
EP0020766B1 (en) * 1978-07-27 1983-03-02 SHIMIZU CONSTRUCTION Co. LTD. Exhaust gas cleaning system for diesel engines
DE3232729A1 (en) * 1982-09-03 1984-03-08 Degussa Ag, 6000 Frankfurt METHOD FOR REDUCING THE IGNITION TEMPERATURE OF DIESEL CARBON FILTERED OUT OF THE EXHAUST GAS FROM DIESEL ENGINES
US4456457A (en) * 1981-04-28 1984-06-26 Nippon Soken, Inc. Exhaust gas cleaning device for diesel engine
US4516993A (en) * 1982-06-01 1985-05-14 Nippondenso Co., Ltd. Carbon particulates cleaning device
DE2638734C2 (en) * 1975-09-02 1986-03-13 Erwin C. Palatine Ill. Betz Metallic catalyst support
EP0174495A1 (en) * 1984-08-08 1986-03-19 Nippon Shokubai Kagaku Kogyo Co., Ltd Catalyst for purifying diesel engine exhaust gases
DE3522287A1 (en) * 1985-06-21 1987-01-02 Moc Danner Gmbh Open-pored body for filtering and/or catalytic treatment of gases or liquids and process for the production thereof
DE3623600A1 (en) * 1986-07-12 1988-01-21 Heraeus Gmbh W C Catalyst for lowering the ignition temperature of diesel soot and diesel soot filter coated therewith

Patent Citations (21)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE953753C (en) * 1952-03-26 1956-12-06 August Ahrens Silencer for internal combustion engines
DE1717174A1 (en) * 1964-04-14 1972-04-13 Texaco Development Corp Catalyst structures for treating gases
DE2233187A1 (en) * 1971-07-20 1973-02-08 Grace W R & Co EMISSION DETOXIFICATION CATALYST
DE2359771B2 (en) * 1972-11-30 1978-05-03 Nippon Shokubai Kagaku Kogyo Co. Ltd., Osaka (Japan) Process for the production of a noble metal supported catalyst
DE2304351A1 (en) * 1973-01-30 1974-08-01 Kali Chemie Ag Catalyst-coated metal structures for exhaust gas purifcn.
DE2360266A1 (en) * 1973-04-30 1974-11-07 Universal Oil Prod Co FULL METAL CATALYST ELEMENT
DE2355498A1 (en) * 1973-11-07 1975-06-05 Hoechst Ag METHOD OF MANUFACTURING A SPONGE-LIKE CERAMIC BODY
DE2453358A1 (en) * 1973-11-12 1975-05-15 Int Nickel Ltd CATALYST FOR PURIFYING GASES
DE2622319A1 (en) * 1975-05-23 1976-12-09 Eznpk Chimia I Chimikotechnits CATALYST FOR THE RESTORING OF ENGINE EXHAUST GASES, IN PARTICULAR DIESEL AND PETROL ENGINES
DE2624686A1 (en) * 1975-06-04 1976-12-23 Ass Octel EXHAUST GAS FILTERS FOR COMBUSTION MACHINERY
DE2638734C2 (en) * 1975-09-02 1986-03-13 Erwin C. Palatine Ill. Betz Metallic catalyst support
DE2641059A1 (en) * 1975-09-12 1977-03-31 Int Nickel Ltd METHOD OF MANUFACTURING A CATALYST FOR PURIFYING GASES
DE2745188A1 (en) * 1977-10-07 1979-04-12 Degussa SHAPED CATALYST, METHOD FOR ITS MANUFACTURING AND USE
EP0020766B1 (en) * 1978-07-27 1983-03-02 SHIMIZU CONSTRUCTION Co. LTD. Exhaust gas cleaning system for diesel engines
DE3149960A1 (en) * 1981-01-27 1982-09-02 W.R. Grace & Co., 10036 New York, N.Y. COMPOSITION AND METHOD FOR TREATING EXHAUST GAS
US4456457A (en) * 1981-04-28 1984-06-26 Nippon Soken, Inc. Exhaust gas cleaning device for diesel engine
US4516993A (en) * 1982-06-01 1985-05-14 Nippondenso Co., Ltd. Carbon particulates cleaning device
DE3232729A1 (en) * 1982-09-03 1984-03-08 Degussa Ag, 6000 Frankfurt METHOD FOR REDUCING THE IGNITION TEMPERATURE OF DIESEL CARBON FILTERED OUT OF THE EXHAUST GAS FROM DIESEL ENGINES
EP0174495A1 (en) * 1984-08-08 1986-03-19 Nippon Shokubai Kagaku Kogyo Co., Ltd Catalyst for purifying diesel engine exhaust gases
DE3522287A1 (en) * 1985-06-21 1987-01-02 Moc Danner Gmbh Open-pored body for filtering and/or catalytic treatment of gases or liquids and process for the production thereof
DE3623600A1 (en) * 1986-07-12 1988-01-21 Heraeus Gmbh W C Catalyst for lowering the ignition temperature of diesel soot and diesel soot filter coated therewith

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JP 61 149222 A. In: Patents Abstracts of Japan, Sect. C., Vol.10, (1986), No.350 *

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3941516A1 (en) * 1989-07-20 1991-06-20 Honda Motor Co Ltd SINTERED CERAMIC ARTICLES AND METHOD FOR THE PRODUCTION THEREOF
DE3941698A1 (en) * 1989-12-18 1991-06-20 Daimler Benz Ag Soot filter
DE4134783A1 (en) * 1991-10-22 1993-04-29 Bosch Gmbh Robert Electroconductive porous inorganic material used as filter or sensor - contains porous inorganic substance, pref. aluminosilicate or aluminium phosphate, and semiconducting metal oxide, pref. tin di:oxide, carbon di:oxide and/or zinc oxide
DE4229471A1 (en) * 1992-09-03 1994-03-10 Man Nutzfahrzeuge Ag Process for the purification of exhaust gases from diesel engines
DE4329558A1 (en) * 1993-09-02 1995-03-09 Friedrich Dr Ing Sperling Soot filter for diesel engines
WO1995024270A1 (en) * 1994-03-08 1995-09-14 Engelhard Corporation Thermal stress resistant monolithic catalyst
EP0727248A1 (en) * 1995-02-17 1996-08-21 ICT Co., Ltd. Catalyst for purification of diesel engine exhaust gas
US5610117A (en) * 1995-02-17 1997-03-11 Ict Co., Ltd. Catalyst for purification of diesel engine exhaust gas
WO1997032119A1 (en) * 1996-02-27 1997-09-04 Astro Met, Inc. Catalytic converter for exhaust gases having a high surface area catalytic core element
DE19809976A1 (en) * 1998-03-09 1999-09-16 Heimbach Gmbh Thomas Josef Shaped bodies made of an electrically conductive ceramic and method for producing contact areas on such shaped bodies
DE19809976C2 (en) * 1998-03-09 2001-09-06 Heimbach Gmbh Thomas Josef Shaped body made of an electrically conductive ceramic compound and method for producing the shaped body
US6607804B1 (en) 1998-03-09 2003-08-19 Thomas Josef Heimbach Gesellschaft Mit Beschrankter Haftung & Co. Molded part made of an electrically conductive ceramic and process for the production of contact zones on such molded parts
WO2000003790A1 (en) * 1998-07-15 2000-01-27 Redem Corporation Self-regenerating oxidation catalyst for treating diesel engine exhaust gases
DE10160639A1 (en) * 2001-12-08 2003-06-26 Fraunhofer Ges Forschung Exhaust gas treatment system for diesel and direct fuel injection petrol engines, passes gases through open-pore ceramic foam with locally-varied pore structure
DE10160639B4 (en) * 2001-12-08 2005-02-24 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. System and method for the aftertreatment of internal combustion engine exhaust gases
EP1515012A1 (en) * 2003-09-11 2005-03-16 PS Unternehmensbeteiligungs GmbH Device for elimination of carbon black particulates from an exhaust gas stream of an internal combustion engine
DE10346281B4 (en) * 2003-09-30 2006-06-22 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. Method for producing components with a nickel-based alloy and components produced therewith
DE102005002687B4 (en) * 2005-01-20 2014-04-03 Hjs Emission Technology Gmbh & Co. Kg Process for coating a filter body
DE102005002687A1 (en) * 2005-01-20 2006-07-27 Hjs Fahrzeugtechnik Gmbh & Co. Kg Coating inflow side of filter body, especially to apply catalytic coating to particle filter for combustion engine exhaust gas, comprises immersion using counter-pressure to inhibit penetration to outflow side
WO2006091135A1 (en) * 2005-02-24 2006-08-31 Volvo Technology Corporation Particulate filter comprising first and second bodies arranged to create turbulance in a gas flow
AT501463B1 (en) * 2005-05-04 2006-09-15 Pankl Emission Control Systems Device for removing soot particles from exhaust gas of diesel motor vehicle, comprises catalyst element for partial oxidation of nitrogen monoxide to nitrogen dioxide and particle filter arranged below catalyst element
US9670105B2 (en) 2005-05-16 2017-06-06 Grain Processing Corporation Method for drying spent filter media
US8832963B2 (en) * 2005-05-16 2014-09-16 Grain Processing Corporation Method for drying spent filter media
US20130247408A1 (en) * 2005-05-16 2013-09-26 Grain Processing Corporation Method for Drying Spent Filter Media
WO2007078855A1 (en) * 2005-12-22 2007-07-12 Basf Catalysts Llc Exhaust inlet metallic foam trap coupled to a downstream monolithic precious metal catalyst
US7521033B2 (en) 2005-12-22 2009-04-21 Basf Catalysts Llc Exhaust inlet metallic foam trap coupled to a downstream monolithic precious metal catalyst
WO2007147669A1 (en) * 2006-06-22 2007-12-27 Robert Bosch Gmbh Filter for purifying a gas flow containing particles and method for the production thereof
DE102009015176A1 (en) 2009-03-20 2011-07-14 Alantum Corporation, Kyonggi Open-porous metal foam body consists of iron based alloy chromium and aluminum, where the foam body is gas-tightly formed
DE102009049732B4 (en) * 2009-10-19 2015-06-03 Alantum Europe Gmbh Metal foam-based filter system for removing hydrocarbons from exhaust air and method for removing hydrocarbons from exhaust air
DE102009049732A1 (en) * 2009-10-19 2011-04-21 Alantum Europe Gmbh Filter element for removing hydrocarbons from exhaust air, has heating mechanism for heating metal foam element, and regulation device regulating heating mechanism such that foam element is held at target temperature
US9169763B2 (en) 2011-04-11 2015-10-27 GM Global Technology Operations LLC System and method for solar-powered control of exhaust after-treatment systems
DE102014011678A1 (en) * 2014-08-05 2016-02-11 Bwf Tec Gmbh & Co. Kg Filter candle element with metal foam reinforcement
CN108745338A (en) * 2018-06-15 2018-11-06 太原理工大学 Magnesium aluminate spinel base medium temperature hydrolytic catalyst of carbonyl sulfur and preparation method
CN114130118A (en) * 2021-10-19 2022-03-04 安徽元琛环保科技股份有限公司 Preparation method and application of three-in-one filtering material for denitration, dioxin removal and dust removal

Similar Documents

Publication Publication Date Title
DE3729126A1 (en) Diesel soot-particle filter and process for the production thereof
DE602004011971T2 (en) hONEYCOMB STRUCTURE
EP0556554B1 (en) Coating dispersion for exhaust gas catalysts
EP1974810B1 (en) Palladium-rhodium single layer catalytic converter
DE102014104748B4 (en) EXHAUST SYSTEM INCLUDING A CATALYZED FILTER
DE2818824C2 (en)
DE2454846C3 (en) Ceramic catalyst carrier with honeycomb structure and process for its production
DE10335635A1 (en) Automotive catalytic converter has open honeycomb structure with pores receiving co-catalytic agent under primary noble metal catalytic substance
DE102008010388B4 (en) Process for coating a diesel particulate filter and diesel particulate filter produced therewith
DE4342652B4 (en) Honeycomb heater
DE4021570A1 (en) Heat resistant supported catalyst - esp. for cleaning automobile exhaust gases
EP0344306A1 (en) Catalyst and process for producing it
DE2308606A1 (en) CATALYST FOR TREATMENT OF ENGINE EXHAUST GASES
DE2758451A1 (en) CATALYST AND METHOD OF MANUFACTURING AND USE OF THE SAME
DE102016120289A1 (en) exhaust gas purification device
DE102017006390A1 (en) Porous ceramic structure
DE3337903A1 (en) Catalyst arrangement
DE19756517A1 (en) Honig honeycomb structure used as carrier for vehicle exhaust gas catalysts
WO2008025603A1 (en) Filter for removing particles from a gas stream and method for producing said filter
EP0348466A1 (en) Catalyst and process for producing it
WO2004030817A2 (en) Method for the production of catalytically active layer silicates
DE2927253C2 (en) Process for the preparation of a denitration catalyst
DE10147661A1 (en) Ceramic carrier and ceramic catalyst body
DE10251245B4 (en) Automotive catalyst
DE10252344A1 (en) Ceramic catalyst body

Legal Events

Date Code Title Description
OM8 Search report available as to paragraph 43 lit. 1 sentence 1 patent law
AG Has addition no.

Ref country code: DE

Ref document number: 3731889

Format of ref document f/p: P

8139 Disposal/non-payment of the annual fee