EP1598535A1 - The catalyzed diesel filter - especially for soot - Google Patents

The catalyzed diesel filter - especially for soot Download PDF

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Publication number
EP1598535A1
EP1598535A1 EP04460030A EP04460030A EP1598535A1 EP 1598535 A1 EP1598535 A1 EP 1598535A1 EP 04460030 A EP04460030 A EP 04460030A EP 04460030 A EP04460030 A EP 04460030A EP 1598535 A1 EP1598535 A1 EP 1598535A1
Authority
EP
European Patent Office
Prior art keywords
catalyst
zone
filter
soot
zones
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Withdrawn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
EP04460030A
Other languages
German (de)
French (fr)
Inventor
Wojciech Walkowiak
Czeslaw Kolanek
Zbigniew J Sroka
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.)
Politechnika Wroclawska
Original Assignee
Politechnika Wroclawska
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 Politechnika Wroclawska filed Critical Politechnika Wroclawska
Publication of EP1598535A1 publication Critical patent/EP1598535A1/en
Withdrawn legal-status Critical Current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
    • F01N3/02—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
    • F01N3/24—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
    • F01N2330/00—Structure of catalyst support or particle filter

Definitions

  • the object of this invention is a catalyzed diesel filter, especially for soot, that is used in the automotive industry as an element of the exhaust systems of vehicles driven by combustion engines and it is also used in the power and chemical industry in chimney filters.
  • the filter is known from a Polish patent specification no. 173058 and it is intended for anti-soot systems installed in the exhaust systems of vehicles with self-ignition engines.
  • the first filter has a ceramic porous filtering structure with formed ducts inside it and an internal heating structure in the form of electrically powered resistance elements placed in some of the ducts.
  • the second filter has a ceramic porous filtering structure made of a resistance ceramic that forms internal volumetric heating structure of the filter and is connected to the cables of the electric circuit.
  • This filter can also have a supporting structure compound of a set of parallel and alternate oriented pipes.
  • the pipes are plugged on one side and are made of a grid with resistant properties. Their ends are connected to the electric-power circuit and in the space between the pipes there is a high temperature resistant, filtering unwoven cloth.
  • a well-known diesel filter that is in use, especially for soot, has a base, which is a part of a profile with high porous structure and a rigid construction made of ceramic material or metal.
  • a highly expanded profile surface is covered with a catalyst carrier layer in the form of zone with only one type of catalyst.
  • the essence of the filter is that on one base the filter has at least three zones with catalysts, where the first zone with a catalyst is separated from the second zone with a catalyst by a middle zone.
  • each middle zone AB is a composition of adjacent to the middle zone catalysts of A and B zones.
  • catalytic compounds of each area with the catalyst are inserted in order from the least active to the most active, the direction is compatible with the exhaust gas flow.
  • the advantage of this catalyzed diesel filter is high efficiency in diesel particulates emissions, a significant limitation of carbon monoxide and nitric oxide emission levels and high filter regeneration efficiency.
  • the use of zones allows for an optimal choice of the catalytic activity of particular zones depending on the composition of gases being filtered and it also leads to effective and economic use of catalytic substances.
  • New catalyzed diesel particulates filters show a self-acting functioning, without service as well as the possibility of co-operating with additional exhaust cleaning systems.
  • a catalyzed diesel filter, especially for soot has on one base three zones with catalysts A, AB and B.
  • First zone with catalyst A is separated by the middle zone AB from the second zone with the B catalyst.
  • the catalytic compounds of each zone with catalyst A, AB, B are set in order from the least active to the most active, in direction compatible with the exhaust gas flow - Fig. 1.
  • a catalyzed diesel filter, especially for soot is made in the same way as in the example 1 but with a small difference, that the catalyst of each middle zone AB is a composition of adjacent to the middle zone catalysts of A and B zones - Fig. 1.
  • a catalyzed diesel filter, especially for soot is made in the same way as in the example 1 but with a difference, that it has on one base five zones with catalyst A, AB, B, BC, C, but the first zone with catalyst A is separated by the first middle zone AB from the second zone with catalyst B.
  • the second zone with catalyst B is separated by the second middle zone BC from the third zone with catalyst C - Fig. 2.

Abstract

The filter has on one base at least three zones with catalysts A, AB, B, where the first zone with catalyst A is separated from the second zone with catalyst B by a middle zone AB. It is significant that the catalyst of each middle zone AB is a composition of adjacent to the middle zone catalysts of A and B zones.

Description

  • The object of this invention is a catalyzed diesel filter, especially for soot, that is used in the automotive industry as an element of the exhaust systems of vehicles driven by combustion engines and it is also used in the power and chemical industry in chimney filters.
  • The filter is known from a Polish patent specification no. 173058 and it is intended for anti-soot systems installed in the exhaust systems of vehicles with self-ignition engines.
  • The first filter has a ceramic porous filtering structure with formed ducts inside it and an internal heating structure in the form of electrically powered resistance elements placed in some of the ducts.
  • The second filter has a ceramic porous filtering structure made of a resistance ceramic that forms internal volumetric heating structure of the filter and is connected to the cables of the electric circuit.
  • This filter can also have a supporting structure compound of a set of parallel and alternate oriented pipes. The pipes are plugged on one side and are made of a grid with resistant properties. Their ends are connected to the electric-power circuit and in the space between the pipes there is a high temperature resistant, filtering unwoven cloth.
  • A well-known diesel filter that is in use, especially for soot, has a base, which is a part of a profile with high porous structure and a rigid construction made of ceramic material or metal. A highly expanded profile surface is covered with a catalyst carrier layer in the form of zone with only one type of catalyst.
  • The essence of the filter, according to the invention, is that on one base the filter has at least three zones with catalysts, where the first zone with a catalyst is separated from the second zone with a catalyst by a middle zone.
  • It is beneficial that the catalyst of each middle zone AB is a composition of adjacent to the middle zone catalysts of A and B zones.
  • It is also advantageous that the catalytic compounds of each area with the catalyst are inserted in order from the least active to the most active, the direction is compatible with the exhaust gas flow.
  • According to this invention, the advantage of this catalyzed diesel filter, especially for soot, is high efficiency in diesel particulates emissions, a significant limitation of carbon monoxide and nitric oxide emission levels and high filter regeneration efficiency. The use of zones allows for an optimal choice of the catalytic activity of particular zones depending on the composition of gases being filtered and it also leads to effective and economic use of catalytic substances. New catalyzed diesel particulates filters show a self-acting functioning, without service as well as the possibility of co-operating with additional exhaust cleaning systems.
  • Some examples of complete filters are presented in Figures 1 and 2, which show schemes of diesel filters.
    • Example 1
  • A catalyzed diesel filter, especially for soot has on one base three zones with catalysts A, AB and B. First zone with catalyst A is separated by the middle zone AB from the second zone with the B catalyst. The catalytic compounds of each zone with catalyst A, AB, B are set in order from the least active to the most active, in direction compatible with the exhaust gas flow - Fig. 1.
    • Example 2
  • A catalyzed diesel filter, especially for soot is made in the same way as in the example 1 but with a small difference, that the catalyst of each middle zone AB is a composition of adjacent to the middle zone catalysts of A and B zones - Fig. 1.
    • Example 3
  • A catalyzed diesel filter, especially for soot is made in the same way as in the example 1 but with a difference, that it has on one base five zones with catalyst A, AB, B, BC, C, but the first zone with catalyst A is separated by the first middle zone AB from the second zone with catalyst B. The second zone with catalyst B is separated by the second middle zone BC from the third zone with catalyst C - Fig. 2.

Claims (3)

  1. A catalyzed diesel filter, especially for soot has a base covered by a zone with catalyst and it is significant, that on one base it has at least three zones with catalyst (A, AB, B), however the first zone with catalyst (A) is separated from the second zone with catalyst (B) by the middle zone (AB).
  2. A filter, according to claim n° 1 where it is significant that the catalyst of each middle zone (AB) is a composition of adjacent to the middle zone catalysts of (A) and (B) zones
  3. A filter, according to claims n° 1 or n° 2 where it is significant that the catalytic compounds of each zone with catalyst (A), (B) are set in order from the least active to the most active, in direction compatible with the exhaust gas flow.
EP04460030A 2004-05-17 2004-07-14 The catalyzed diesel filter - especially for soot Withdrawn EP1598535A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PL368021A PL202891B1 (en) 2004-05-17 2004-05-17 Solid matter filter, particularly for soot
PL36802104 2004-05-17

Publications (1)

Publication Number Publication Date
EP1598535A1 true EP1598535A1 (en) 2005-11-23

Family

ID=34933171

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04460030A Withdrawn EP1598535A1 (en) 2004-05-17 2004-07-14 The catalyzed diesel filter - especially for soot

Country Status (2)

Country Link
EP (1) EP1598535A1 (en)
PL (1) PL202891B1 (en)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4118199A (en) * 1975-09-23 1978-10-03 Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler Monolithic carrier catalyst and arrangements of such a catalyst for the purification of exhaust gases from an internal combustion engine
DE3732655A1 (en) * 1987-09-28 1989-04-13 Edt Technik Consult Und Umwelt Heating furnace or water heater for burning solid, liquid or gaseous fuels
DE3907939A1 (en) * 1989-01-27 1990-08-02 Asea Brown Boveri Device for cleaning the exhaust gases from diesel engines
EP0835684A2 (en) * 1996-10-11 1998-04-15 Johnson Matthey Public Limited Company Emission control

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4118199A (en) * 1975-09-23 1978-10-03 Deutsche Gold- Und Silber-Scheideanstalt Vormals Roessler Monolithic carrier catalyst and arrangements of such a catalyst for the purification of exhaust gases from an internal combustion engine
DE3732655A1 (en) * 1987-09-28 1989-04-13 Edt Technik Consult Und Umwelt Heating furnace or water heater for burning solid, liquid or gaseous fuels
DE3907939A1 (en) * 1989-01-27 1990-08-02 Asea Brown Boveri Device for cleaning the exhaust gases from diesel engines
EP0835684A2 (en) * 1996-10-11 1998-04-15 Johnson Matthey Public Limited Company Emission control

Also Published As

Publication number Publication date
PL202891B1 (en) 2009-08-31
PL368021A1 (en) 2005-11-28

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