WO2000002657A1 - Corps catalyseur - Google Patents

Corps catalyseur Download PDF

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Publication number
WO2000002657A1
WO2000002657A1 PCT/DE1999/001939 DE9901939W WO0002657A1 WO 2000002657 A1 WO2000002657 A1 WO 2000002657A1 DE 9901939 W DE9901939 W DE 9901939W WO 0002657 A1 WO0002657 A1 WO 0002657A1
Authority
WO
WIPO (PCT)
Prior art keywords
channels
catalyst body
channel
cross
flow
Prior art date
Application number
PCT/DE1999/001939
Other languages
German (de)
English (en)
Inventor
Erich Hums
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2000002657A1 publication Critical patent/WO2000002657A1/fr

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
    • F01N3/08—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
    • F01N3/281—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates
    • F01N3/2821—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates the support being provided with means to enhance the mixing process inside the converter, e.g. sheets, plates or foils with protrusions or projections to create turbulence
    • 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
    • B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86—Catalytic processes
    • B01D53/8621—Removing nitrogen compounds
    • B01D53/8625—Nitrogen oxides
    • B01D53/8631—Processes characterised by a specific device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34—Chemical or biological purification of waste gases
    • B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
    • B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
    • B01D53/9404—Removing only nitrogen compounds
    • B01D53/9409—Nitrogen oxides
    • B01D53/9431—Processes characterised by a specific device
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
    • B01J35/00—Catalysts, in general, characterised by their form or physical properties
    • B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
    • B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
    • 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
    • F01N3/281—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates
    • F01N3/2817—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates only with non-corrugated sheets, plates or foils
    • 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
    • F01N2330/30—Honeycomb supports characterised by their structural details
    • F01N2330/34—Honeycomb supports characterised by their structural details with flow channels of polygonal cross section

Definitions

  • the invention De
  • Such a catalyst body is known for example from DE 26 58 539 C3 and is usually used for cleaning exhaust gas from an incineration plant.
  • An example of this is the removal of nitrogen oxides by the selective catalytic reduction (SCR) process, hydrocarbons, Konlenmonoxid and / or dioxins from the exhaust gas.
  • SCR selective catalytic reduction
  • An incineration plant is, for example, a boiler plant, a coal, oil or gas-fired power plant, a gas turbine or a combustion engine, in particular a diesel engine.
  • a waste incineration plant also emits the pollutants mentioned.
  • the catalyst body is of a Stromungs ⁇ medium, such as an exhaust gas, flows through.
  • the ka ⁇ catalyzed chemical reaction of reactants contained in the Stromungsmedium runs from the Wandoberflacr.e of the channels in the contact of the reactants.
  • the flow medium usually flows laminarly through the channels of the catalyst body. This creates the problem that the reactants come into insufficient contact with the catalytically active surface of the channels. Their catalytic use is not optimal.
  • a catalyst for increasing ⁇ er ".atalytiscnen use the surface of the channels comprises a number of catalyst elements staggered one behind the other in the direction of flow. This causes the laminar flow beneath the channels at the end of each catalytic element to become underdrokes.
  • This catalyst body only solves the problem unsatisfactorily. In addition, its production is associated with considerable effort.
  • a Kata ⁇ lysatorkorper which comprises a number of direction in Stromungs- arranged behind one another catalyst elements wooei between catalyst elements veroleibt a free space.
  • Such a catalyst body also solves the problem unsatisfactorily and, because of the large number of catalyst elements, can also be produced only with great effort.
  • a catalyst body is known from EP 0 315 047 A2, in the channel walls of which holes are made by drilling or pounding. This measure also achieves only an insufficient effect WIR, is associated with considerable production effort and be ⁇ impaired ⁇ ie stability of Katalysatorkorpers.
  • a similar solution test is known from DE 41 22 807 AI, in which a catalyst body is described, the large-volume slots are announced. However, the stability of the catalyst body is considerably impaired by these slots.
  • the DE 42 10 ⁇ ? 84 AI discloses a metal honeycomb body, the channels of which have structures that are repeatedly broken in the direction of flow. This interruption is said to disrupt the lambatate. Such an embodiment cannot be produced for an ion-catalytic catalytic converter, or cannot be produced with a contractual effort. Because such a catalyst body is most effectively manufactured by extrusion (extrusion). In this case, the structures which have been interrupted for a long time can only be worked into the catalyst body with great effort.
  • the invention is therefore based on the object of specifying a Kataly ⁇ satorkorper wherein ⁇ _e catalytically active upper ⁇ flat particularly uniformly un ⁇ intensive to implement contained in Stromungsmedium reactants is used, which is mechanically stable and let be produced easily and inexpensively.
  • a monolithic catalyst body having a multiplicity of cross-sectional profiles predetermined in each case through parallel channels through which a flow direction can flow, the cross-sectional profile of a number of channels unchanged over the length of the channels having a section according to the invention , which is directed towards the inside of the channel.
  • the invention is based on the consideration that through the entry of the flow medium m the channels of the catalyst body result in turbulence in the flow of the flow medium. Behind a short inlet zone characterized by turbulent flow, the flow medium flows essentially laminar. In laminar flow, the medium flowing in the middle of a channel can only reach the catalytically active surface of the channel through the mechanism of diffusion and no longer ⁇ urcn turbulence, in order to enter the desired reaction there. This means that in the prior art only the catalytically active surface within the turbulent inlet zone of the channels m is used to a satisfactory extent for the catalysis of the desired reaction. The rest of the catalytically active surface is only partially used. A a ⁇ f entire length of the channels and gleichloisige but intensive use the surface to let by impaired Lammaritat achieved ⁇ hen a disturbance evenly durcn ⁇ n whole channel extends.
  • the invention is based on the consideration that, due to the ami ⁇ ar flow m of the ca nalen, the flow velocity of the flow medium m near the channel walls is low, while it is much higher in the middle of the channels.
  • m the Ka ⁇ nalinnere directed portion ⁇ es Queritessproflls is achieved that an area of slower flow, namely derje ⁇ nige, the wall directly to the channel m the interior facing channel ⁇ , the region fast flux m extends.
  • a disturbance is therefore introduced into the rapid flow running in the middle of the channel. In this area of the disturbance, fast and slow currents are brought into the immediate vicinity.
  • the Reynolds number which is the charac teristic ⁇ Large for laminar or turbulent flow, m greatly increases this area. Due to the strong speed drop around the perturbation, the laminar flow breaks off near the perturbation, and turbulence forms, which ensures an increased mixing of the flow medium. This ensures better transport of the reactants contained in the flow medium to the catalytically active wall surface of the channels. This leads to a particularly uniform and intensive conversion of reactants contained in the flow medium on the catalytically active surface.
  • This advantage can be achieved without changing the previous manufacturing methods of monolithic catalyst bodies by conventional extrusion measures.
  • the catalyst body is pressed in a known manner in a strand, without additional work steps compared to conventional processes.
  • the section of the cross-sectional profile of the channels directed towards the inside of the channel is formed by the wall of the respective channel.
  • the wall forming this section is not or only insignificantly thicker than the outer channel wall.
  • This embodiment of the invention has additionally applied to the channel walls, directed towards the inside of the channel thick-walled structures have the advantage that a lower pressure loss is caused in the flow of the flow medium.
  • the channel cross section is characterized by a section directed toward the inside of the channel, which section is designed as an edge.
  • the edge divides the channel cross-section into m connected cross-sections. This creates a channel that can be thought of as being divided into two channel strips.
  • the edge m is designed in such a way that the channel strips are characterized by cross sections of different sizes, the average speed at which the flow medium flows through the channel strips is different for each channel strip. The differently rapid flows of the two trains meet each other along the edge, thus creating turbulence along the edge inside the channel, which ensures uniform mixing of the flow medium.
  • the section of the cross-sectional profile directed towards the inside of the channel is also advantageous to design the section of the cross-sectional profile directed towards the inside of the channel as a web oriented towards the center of the channel.
  • a web lowers the high flow rate of the flow medium in the middle of the channel only to a small extent.
  • an area of slow flow namely the area directly around the web, is brought close to the area of the fast flow in the middle of the channel.
  • particularly strong turbulence develops, which causes a uniform mixing of the flow medium and thus requires a uniform and intensive catalytic use of the channel surface.
  • the channels are designed in such a way that they have several sections directed towards the inside of the channel. This creates several areas, in which different scans currents are brought together. Turbulence develops in each of these areas.
  • the design of the channels of the catalyst body is expediently adapted to its operating conditions.
  • the suitable cross- sectional profile of the channels of the catalyst body results from these operating conditions. It is advantageous to all channels emheitlicn with this cross-sectional profile equip a uniform catalytic implementation-the reactants contained in the Stromungsmedium in Kataly ⁇ achieve satorkorper. This is also advantageous from the point of view of production, since the shape of the catalyst body is relatively simple.
  • the same channels, that is to say a homogeneous nature of the catalyst body have an advantageous effect on certain production steps, such as drying or calcining.
  • the catalyst bodies In the case of a catalyst module which is composed of a plurality of catalyst bodies arranged next to one another, the catalyst bodies generally have an essentially rectangular cross-sectional profile.
  • the individual channels In such Katalysa ⁇ torkorper it is expedient to design the individual channels in such a way that the cross-sectional profiles of a plurality of adjacent channels together form a rectangular cross-sectional profile. In this way it is possible to fill the rectangular cross-sectional profile of the catalyst body only with the desired cross-sectional profiles of the channels, without channels with non-targeted cross-sectional profiles being formed or even areas completely filled with catalyst material. In this way, the pressure loss in the flow medium generated by the catalyst body is kept low.
  • the catalyst body is advantageously produced as a full extrudate pressed in one strand from a catalytically active composition.
  • a full extrudate can be produced using an extruding machine. This is how shaped bodies become produced from a soft, plastic mass, which is then solidified (eg calcimerti. The section of the cross-sectional profile which is unchanged in the longitudinal direction of the channels and which faces the interior of the channel does not hinder extrusion of the catalyst body.
  • the upper surface of each channel which is freely accessible to the exhaust gas advantageously has the materials titanium dioxide (T ⁇ 0 2 ) at 70 to 95% by weight, tungsten trioxide (W0 3 ) and / or molybdenum trioxide (Mo0 3 ) to 0 to 15% by weight and vanadium pentoxide (V_0 3 ) to less than 5% by weight.
  • T ⁇ 0 2 titanium dioxide
  • W0 3 tungsten trioxide
  • Mo0 3 molybdenum trioxide
  • V_0 3 vanadium pentoxide
  • FIG. 1 shows a perspective view of the inflow side of a monolithic catalyst body with channels of the same cross-sectional profile, which have an edge projecting into the channel;
  • FIG. 2 shows a view of the inflow side of a catalyst body, in the case of ⁇ e the majority of the channels have four edges projecting into the channel;
  • FIG 3 shows a view of the inflow side of a catalyst body, four webs m reaching the interior of the channel for each channel.
  • FIG. 4 shows a view of the base of a catalyst body with hexagonal channels, into which three webs with transverse webs are provided.
  • FIG. 1 shows a perspective view of a monolithic catalyst body 11, the inflow side of which is a quatra- has a cross-sectional profile.
  • Seme 72 channels 12 can be flowed through by a flow medium, for example an exhaust gas from a combustion system, such as a power plant, in the flow direction 10.
  • the channels 12 are designed in such a way that two channels 12 lying together form a rectangular cross-sectional profile. All channels 12 are the same and completely fill the catalyst body 11.
  • the channels 12 are each distinguished by a single section or edge 14 pointing toward the inside of the channel, in such a way that each channel 12 is delimited by six flat channel walls 15.
  • the edges 14 are formed by the respective wall 15 of the channels.
  • each channel 12 shape each channel 12 so that it can be subdivided into two interconnected channel strips 16, 17 of rectangular cross-sectional profile, namely a small channel strip 16 and a large channel strip 17. If a flow medium flows through the catalyst body 11, it forms in large train 17 of each channel 12 a faster flow than m its small train 16. At the open connection between the two trains 16, 17, the differently fast flows adjoin one another and thus create a turbulence zone along the edge 14 which extends over the entire length of the channel 12 extends.
  • FIG. 2 shows a top view of the inflow side of a catalyst body 21 with a square cross section, which is characterized by cross-sectional profiles with cross-shaped channels 22.
  • a flow medium can flow through them in the flow direction 20.
  • Several of these channels 22 cannot be combined into a rectangular cross-sectional profile, so that channels 23 of different cross-sectional profile are also present at the edge of the catalyst body 21.
  • In each of the channels 22 there are four identical edges 24.
  • Each channel 22 m can be used to subdivide four channels 26 and a middle cable 25.
  • the flow of the flow medium is the fastest in the middle train 25, since it has no limitation by flat channel walls 2 1 . Only the four edges 24 reach the middle turn 25.
  • each channel is characterized by areas of turbulent flow over its entire length.
  • the edges 24 themselves are formed from the wall 27 between the channels 22, 23 and are not placed on the channel walls as a separate structure. As a result, the pressure loss of the catalyst body generated by the channel wall 27 is kept low.
  • FIG. 3 four webs 38 m extend inside the channel of each channel 32 of the catalyst body 31 through which flow can flow 30. All 36 channels 32 of the catalyst body 31 have the same cross-sectional profile.
  • the webs 38 are each arranged centrally on the associated wall 37. Due to the friction of the flow medium flowing through the channels 32 with the webs 38, the webs 38 are surrounded by a small area of slow flow. This area extends up to m the middle area ⁇ of the respective channel 32, which is characterized by rapid flow. The areas of slow and fast flow meet directly at the edges of the webs 38. Due to the high difference in speed in the narrowest space, the laminar flow breaks off in the area around the edge of the webs 38.
  • turbulence forms around the webs 38 and extends through the entire length of the channels 32.
  • the webs 38 s ⁇ itself are not a wall that separates adjacent channels, but are placed on such separating walls 37.
  • the webs 38 are thinner or not significantly thicker than the channel walls 37.
  • the catalyst body 31 does not cause a substantially greater pressure loss in the flow of the flow medium than a catalyst body with a comparable wall area per volume of catalyst body.
  • This catalyst body 31 can also be produced in a simple manner by extrusion cn from a solid material.
  • FIG. 4 Another exemplary embodiment of the invention is shown in FIG. 4.
  • a monolithic catalyst body 41 is formed by 19 channels 42 hexagonal cross-sectional profile.
  • the cross-sectional profile of all channels 42 is the same.
  • the area of slow flow of the flow medium flowing in the flow direction 40 through the channels 42 is defined by this crossbar 49 around the edge of each web
  • the size of the webs 48 and their transverse webs 49 is appropriately adapted to the operating conditions of the catalyst body 41.
  • the web 48 and the cross web 49 should not be so large that the rapid flow m of the center of the channel is slowed down so much that the flow velocity difference between the center of the channel and the area around the cross web 49 necessary for turbulence formation becomes too small.
  • the catalyst body 41 is used as a DeNox catalyst and is formed from a catalytically active composition which comprises the materials titanium dioxide (T ⁇ 0 2 ) to 70 to 95% by weight, tungsten oxide (W0 3 ) and / or molybdenum trioxide (Mo0 3 ) 0 to 15% by weight and Vanadmpentoxi ⁇ (V 2 0 5 ) less than 5
  • Gew.- includes.
  • the same material composition can also be used for the catalyst bodies from FIGS. 1, 2 and 3.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Health & Medical Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Toxicology (AREA)
  • Biomedical Technology (AREA)
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  • Oil, Petroleum & Natural Gas (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Catalysts (AREA)

Abstract

L'invention concerne un corps catalyseur (11, 21, 31, 41) monolytique comportant une pluralité de canaux (12, 22, 23, 32, 42) parallèles pouvant être traversés par un milieu en écoulement, dont un certain nombres se caractérisent par un tronçon (14, 24, 38, 48, 49) orienté vers l'intérieur dans le canal (12, 22, 32, 42) du profil de section. Ainsi, des zones d'écoulement rapide et d'écoulement lent se trouvent à proximité immédiate à l'intérieur d'un canal (12, 22, 32, 42), ce qui entraîne la formation de turbulences. Cela permet une exploitation régulière et intensive de la surface catalytiquement active des canaux (12, 22, 32, 42).
PCT/DE1999/001939 1998-07-07 1999-07-01 Corps catalyseur WO2000002657A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19830342.4 1998-07-07
DE19830342A DE19830342C1 (de) 1998-07-07 1998-07-07 Katalysatorkörper

Publications (1)

Publication Number Publication Date
WO2000002657A1 true WO2000002657A1 (fr) 2000-01-20

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ID=7873239

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/DE1999/001939 WO2000002657A1 (fr) 1998-07-07 1999-07-01 Corps catalyseur

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DE (1) DE19830342C1 (fr)
WO (1) WO2000002657A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2311550A1 (fr) * 2008-08-07 2011-04-20 Mitsubishi Heavy Industries, Ltd. Dispositif et système de traitement des gaz d'échappement
EP2311549A1 (fr) * 2008-08-07 2011-04-20 Mitsubishi Heavy Industries, Ltd. Dispositif de traitement de gaz d'échappement et système de traitement de gaz d'échappement
CN102949932A (zh) * 2012-11-09 2013-03-06 浙江达峰汽车技术有限公司 尾气净化用催化净化器的蜂窝载体

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DE19922355A1 (de) 1999-05-14 2000-11-23 Helmut Swars Katalysatorträgerkörper
DE102004024685A1 (de) * 2004-05-19 2005-12-15 Emitec Gesellschaft Für Emissionstechnologie Mbh Katalysator-Trägerkörper für einen motornah einzusetzenden katalytischen Konverter
DE202006007876U1 (de) * 2006-05-15 2007-09-20 Bauer Technologies Gmbh Optimierung von zellulären Strukturen, insbesondere für die Abgasreinigung von Verbrennungsaggregaten und andere Anwendungsbereiche
CN101687135B (zh) * 2007-07-05 2013-08-14 开利公司 具有非层流结构的流体净化器
CH711115A2 (de) 2015-05-22 2016-11-30 Exentis Tech Ag Mehrstufiger Körper mit einer Vielzahl von Strömungskanälen.
CN110582339B (zh) * 2016-12-12 2022-05-03 康明泰克股份有限公司 Scr催化剂模块及其对应的催化剂反应器

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US4135018A (en) * 1976-08-05 1979-01-16 Corning Glass Works Thermal shock resistant honeycomb structures
US4448828A (en) * 1980-07-11 1984-05-15 Ngk Insulators, Ltd. Ceramic honeycomb structural bodies
DE3501941A1 (de) * 1985-01-22 1986-07-24 Ekkehard Prof. Dr.-Ing. 4300 Essen Weber Steg-katalysator vorrichtung zur entfernung von stickoxiden
EP0191982A1 (fr) * 1985-01-21 1986-08-27 Ngk Insulators, Ltd. Elément céramique en nid d'abeilles
EP0201614A1 (fr) * 1985-05-14 1986-11-20 GebràœDer Sulzer Aktiengesellschaft Réacteur pour exécuter des réactions chimiques catalytiques hétérogènes
EP0240796A2 (fr) * 1986-04-08 1987-10-14 Kernforschungszentrum Karlsruhe Gmbh Support de catalyseur et son procédé de fabrication
DE4215481A1 (de) * 1992-05-11 1993-11-18 Siemens Ag Geformter keramischer Katalysator und Verfahren zu seiner Herstellung

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DE4210784A1 (de) * 1992-04-01 1993-10-07 Emitec Emissionstechnologie Metallwabenkörper mit Bereichen unterschiedlicher Strömung

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Publication number Priority date Publication date Assignee Title
US3983283A (en) * 1974-03-18 1976-09-28 Corning Glass Works Honeycombed structures having open-ended cells formed by interconnected walls with longitudinally extending discontinuities
US4135018A (en) * 1976-08-05 1979-01-16 Corning Glass Works Thermal shock resistant honeycomb structures
US4448828A (en) * 1980-07-11 1984-05-15 Ngk Insulators, Ltd. Ceramic honeycomb structural bodies
EP0191982A1 (fr) * 1985-01-21 1986-08-27 Ngk Insulators, Ltd. Elément céramique en nid d'abeilles
DE3501941A1 (de) * 1985-01-22 1986-07-24 Ekkehard Prof. Dr.-Ing. 4300 Essen Weber Steg-katalysator vorrichtung zur entfernung von stickoxiden
EP0201614A1 (fr) * 1985-05-14 1986-11-20 GebràœDer Sulzer Aktiengesellschaft Réacteur pour exécuter des réactions chimiques catalytiques hétérogènes
EP0240796A2 (fr) * 1986-04-08 1987-10-14 Kernforschungszentrum Karlsruhe Gmbh Support de catalyseur et son procédé de fabrication
DE4215481A1 (de) * 1992-05-11 1993-11-18 Siemens Ag Geformter keramischer Katalysator und Verfahren zu seiner Herstellung

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2311550A1 (fr) * 2008-08-07 2011-04-20 Mitsubishi Heavy Industries, Ltd. Dispositif et système de traitement des gaz d'échappement
EP2311549A1 (fr) * 2008-08-07 2011-04-20 Mitsubishi Heavy Industries, Ltd. Dispositif de traitement de gaz d'échappement et système de traitement de gaz d'échappement
EP2311549A4 (fr) * 2008-08-07 2012-08-08 Mitsubishi Heavy Ind Ltd Dispositif de traitement de gaz d'échappement et système de traitement de gaz d'échappement
EP2311550A4 (fr) * 2008-08-07 2012-08-29 Mitsubishi Heavy Ind Ltd Dispositif et système de traitement des gaz d'échappement
US8518332B2 (en) 2008-08-07 2013-08-27 Mitsubishi Heavy Industries, Ltd. Air pollution control apparatus and air pollution control system
CN102949932A (zh) * 2012-11-09 2013-03-06 浙江达峰汽车技术有限公司 尾气净化用催化净化器的蜂窝载体
CN102949932B (zh) * 2012-11-09 2014-06-04 浙江达峰汽车技术有限公司 尾气净化用催化净化器的蜂窝载体

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