EP0840840B1 - A catalyst carrier arrangement - Google Patents

A catalyst carrier arrangement Download PDF

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Publication number
EP0840840B1
EP0840840B1 EP96911153A EP96911153A EP0840840B1 EP 0840840 B1 EP0840840 B1 EP 0840840B1 EP 96911153 A EP96911153 A EP 96911153A EP 96911153 A EP96911153 A EP 96911153A EP 0840840 B1 EP0840840 B1 EP 0840840B1
Authority
EP
European Patent Office
Prior art keywords
monolith
casing
metal
catalyst body
section
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.)
Revoked
Application number
EP96911153A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0840840A1 (en
Inventor
Sven Melker Nilsson
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.)
Dinex Ecocat Oy
Original Assignee
Kemira Metalkat Oy
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=20398107&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=EP0840840(B1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by Kemira Metalkat Oy filed Critical Kemira Metalkat Oy
Publication of EP0840840A1 publication Critical patent/EP0840840A1/en
Application granted granted Critical
Publication of EP0840840B1 publication Critical patent/EP0840840B1/en
Anticipated expiration legal-status Critical
Revoked legal-status Critical Current

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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
    • F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
    • F01N3/2842—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration specially adapted for monolithic supports, e.g. of honeycomb type
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
    • F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
    • F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
    • F01N3/08—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
    • 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

Definitions

  • the subject invention concerns a carrier arrangement for catalytic converters.
  • metal substrates As substrates to be used to support the catalytic material in internal combustion engine exhaust systems ceramic materials are predominantly used. In latter years, metal substrates have, however, come into use to an increasingly large extent. The advantage of metal substrates is their ability to reach working temperatures more rapidly than do cermamic ones, as accordingly they begin their exhaust gases purification function at an earlier stage after start, which is a most essential feature. Moreover, metal substrates are more efficient thermal conductors, and thus they may be heated more quickly and the risk of local overheating is reduced. In addition, metal substrates support higher temperatures than ceramic ones.
  • metal monoliths As carrier members supporting the catalytic material so called metal monoliths are used. These consist of metal foils, preferably of stainless steel, wound into rolls wherein metal foils of flat configuration alternate with metal foils of corrugated configuration, whereby throughflow channels extending through the catalyst body are formed.
  • the foil thickness is small, normally only about 0.05 mm.
  • the catalyst body also includes a metal cover forming a jacket surrounding the monolith in contact with the latter. The cover thickness may amount to approximately 1 - 1.6 mm.
  • the thin carrier member foils are heated very rapidly.
  • the temperature quickly reaches between 500 and 800°C.
  • the temperature may rise to the range of up to between 1100 and 1200°C.
  • the temperature of the catalyst body rapidly sinks to the level of the ambient temperature.
  • the repeated temperature changes constitute a problem that affects the catalyst long-term durability.
  • the rapidly heated thin foils of the monolith also expand quickly.
  • the surrounding casing in abutment against the monolith but not in close contact with the exhausts and in addition having a larger material thickness, is heated and expands at a slower pace. During the heating, the casing thus prevents the monolith from expanding, which gives rise to considerable radial compressive forces that cause deformations to form in the monolith.
  • the strength of the metal also is reduced considerably, often down to about 10% of its strength at room temperature, which aggravates the deformations and reduces the monolith life further.
  • US 4,909,994 discloses a carrier arrangement for catalytic converters comprising a catalyst body which consists of a monolith of carrier members designed to support a catalytic material, said carrier members formed by superposed, alternately flat and corrugated metal foils which are helically wound to form through-flow channels extending through the catalyst body, and of a metal casing, the material thickness of which exceeds that of the metal foils and which casing encloses the monolith, whereby the interior width of the casing exceeds that of the monolith, whereby a gap forms between the casing and the monolith, and said gap is bridged at least in the area of a section by a radial bandlike depression of the casing extending circumferentially around the monolith.
  • the subject invention provides a simple, reliable and economical solution to the securement problem.
  • the solution functions both when applied to metal monoliths soldered together in the manner indicated above and when applied to metal monoliths joined together in some other manner, without soldering.
  • the characteristic features of the attachment arrangement appear from the appended claims.
  • the casing 2 is provided with at least one band-like depression 7, in accordance with the embodiment illustrated in the drawing figure with two such depressions, the gap 6 around the monolith 3 thus being eliminated in the area opposite said depressions.
  • the casing 2 and the monolith 3 are interconnected, preferably only at spaced intervals 8, for instance by means of soldering or welding.
  • the monolith 3 When the monolith 3 is heated by the exhaust gases flowing through it, the monolith 3 expands quicker than the casing 2, which is due partly to the more intimate contact of the monolith 3 with the hot exhaust gases, partly to the larger material thickness of the casing 2. The expansion may now take place essentially unimpededly, with the exception of in the area of the depressions 7 where a certain deformation of the outermost foil 4 of the monolith 3 will take place. Consequently, no compressive forces will generate along the major part of the surface of the monolith 3. When the casing and the monolith 3 again cool down, the monolith 3 may again retract and thus again open up a gap 6.
  • the catalyst body 1 may operate in an intact condition over a longer period than has hitherto been possible, with consequential increase of its serviceable life.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Exhaust Gas After Treatment (AREA)
  • Catalysts (AREA)
EP96911153A 1995-04-27 1996-04-18 A catalyst carrier arrangement Revoked EP0840840B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
SE9501556 1995-04-27
SE9501556A SE506670C2 (sv) 1995-04-27 1995-04-27 Fästarrangemang för katalysatorer
PCT/SE1996/000499 WO1996034188A1 (en) 1995-04-27 1996-04-18 A catalyst carrier arrangement

Publications (2)

Publication Number Publication Date
EP0840840A1 EP0840840A1 (en) 1998-05-13
EP0840840B1 true EP0840840B1 (en) 2003-07-23

Family

ID=20398107

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96911153A Revoked EP0840840B1 (en) 1995-04-27 1996-04-18 A catalyst carrier arrangement

Country Status (9)

Country Link
EP (1) EP0840840B1 (zh)
JP (1) JPH11504094A (zh)
KR (1) KR19990008026A (zh)
CN (1) CN1084429C (zh)
AU (1) AU5412096A (zh)
DE (1) DE69629196T2 (zh)
ES (1) ES2203689T3 (zh)
SE (1) SE506670C2 (zh)
WO (1) WO1996034188A1 (zh)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1096542C (zh) * 1997-03-21 2002-12-18 凯米拉梅塔尔卡特公司 催化反应器的改进
JP2001516418A (ja) * 1997-03-21 2001-09-25 メルケル ニルソン，スベン 触媒反応器の改良
SE9704265L (sv) 1997-11-21 1998-10-19 Nilcon Eng Ab Katalysator med kamfläns för fastklämning
SE522537C2 (sv) 2000-03-21 2004-02-17 Kemira Metalkat Oy Katalysatorbärare med mantel
EP1230978B1 (en) * 2001-02-12 2005-09-28 Ecocat Oy Method for manufacturing a corrugated metal reactor packing
JP5080306B2 (ja) * 2008-02-14 2012-11-21 エコキャット オサケユイチア 改良された触媒反応器
DE102018201738A1 (de) 2018-02-05 2019-08-08 Continental Automotive Gmbh Katalysator und Verfahren zu dessen Herstellung

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4909994A (en) * 1987-07-10 1990-03-20 Nissan Motor Co., Ltd. Catalytic converter
DE3926072A1 (de) * 1989-08-07 1991-02-21 Behr Gmbh & Co Katalysator zur abgasreinigung mit elastischen elementen zum ausgleich von laengsdehnungen
DE3930680A1 (de) * 1989-09-14 1991-03-28 Behr Gmbh & Co Katalysator zur abgasreinigung mit dehnungen ausgleichender lagerung
US5079210A (en) * 1989-11-16 1992-01-07 Toyota Jidosha Kabushiki Kaisha Metallic support for exhaust gas purifying catalyst

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0212243B1 (de) * 1985-07-25 1989-07-12 INTERATOM Gesellschaft mit beschränkter Haftung Halterung für einen metallischen Abgaskatalysatorträgerkörper und Verfahren zur Herstellung
DE8812762U1 (de) * 1988-10-11 1989-06-29 Emitec Gesellschaft für Emissionstechnologie mbH, 5204 Lohmar Katalysator mit Doppelmantelsystem

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4909994A (en) * 1987-07-10 1990-03-20 Nissan Motor Co., Ltd. Catalytic converter
DE3926072A1 (de) * 1989-08-07 1991-02-21 Behr Gmbh & Co Katalysator zur abgasreinigung mit elastischen elementen zum ausgleich von laengsdehnungen
DE3930680A1 (de) * 1989-09-14 1991-03-28 Behr Gmbh & Co Katalysator zur abgasreinigung mit dehnungen ausgleichender lagerung
US5079210A (en) * 1989-11-16 1992-01-07 Toyota Jidosha Kabushiki Kaisha Metallic support for exhaust gas purifying catalyst

Also Published As

Publication number Publication date
SE9501556D0 (sv) 1995-04-27
JPH11504094A (ja) 1999-04-06
AU5412096A (en) 1996-11-18
WO1996034188A1 (en) 1996-10-31
DE69629196D1 (de) 2003-08-28
DE69629196T2 (de) 2004-02-19
KR19990008026A (ko) 1999-01-25
ES2203689T3 (es) 2004-04-16
SE506670C2 (sv) 1998-01-26
SE9501556L (sv) 1996-10-28
CN1182468A (zh) 1998-05-20
EP0840840A1 (en) 1998-05-13
CN1084429C (zh) 2002-05-08

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