WO2012158022A1 - Exhaust system for a diesel engine - Google Patents
Exhaust system for a diesel engine Download PDFInfo
- Publication number
- WO2012158022A1 WO2012158022A1 PCT/NL2012/050304 NL2012050304W WO2012158022A1 WO 2012158022 A1 WO2012158022 A1 WO 2012158022A1 NL 2012050304 W NL2012050304 W NL 2012050304W WO 2012158022 A1 WO2012158022 A1 WO 2012158022A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- exhaust gas
- coated
- walls
- coating
- catalyst coating
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/033—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
- F01N3/02—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
- F01N3/08—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
- F01N3/2066—Selective catalytic reduction [SCR]
-
- 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
- F01N2510/00—Surface coverings
- F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
-
- 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
- F01N2510/00—Surface coverings
- F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
- F01N2510/068—Surface coverings for exhaust purification, e.g. catalytic reaction characterised by the distribution of the catalytic coatings
- F01N2510/0682—Surface coverings for exhaust purification, e.g. catalytic reaction characterised by the distribution of the catalytic coatings having a discontinuous, uneven or partially overlapping coating of catalytic material, e.g. higher amount of material upstream than downstream or vice versa
-
- 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
- F01N2570/00—Exhaust treating apparatus eliminating, absorbing or adsorbing specific elements or compounds
- F01N2570/18—Ammonia
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Definitions
- the invention relates to an exhaust gas system for a diesel engine comprising an inlet and an outlet and a filter located in between comprising a plurality of channels arranged next to one another and having porous walls, where neighbouring channels are alternately shut off by an end plug at the inlet end and the outlet end, as a result of which the exhaust gas is forced to flow through the walls which are at least partially coated with a first coating.
- a filter located in between comprising a plurality of channels arranged next to one another and having porous walls, where neighbouring channels are alternately shut off by an end plug at the inlet end and the outlet end, as a result of which the exhaust gas is forced to flow through the walls which are at least partially coated with a first coating.
- An exhaust system of this type is generally known in the form of a diesel particle filter (DPF) in which the walls of the channels are coated with a selective catalytic reduction catalyst (SCR catalyst). The end plugs are generally installed before the walls are coated.
- DPF diesel particle filter
- SCR catalyst selective catalytic reduction catalyst
- the exhaust gas system according to the invention is characterized in that from the outlet end to a distance from this outlet end, the walls are coated with a second coating, where the end plugs in the outlet ends have a length that is at least equal to said distance over which the walls are coated with the second coating. If the AMOX catalyst has not been coated in the place of the end plugs on the walls of the channels, the exhaust gas will partially flow through the AMOX catalyst coated wall sections and partially through the SCR catalyst coated wall sections.
- Figure 1 shows an embodiment of the exhaust gas system according to the invention in longitudinal section
- FIG. 1 gives a detailed representation of the interior of the exhaust gas system shown in Fig. 1.
- FIG. 1 shows an embodiment of the exhaust gas system for a diesel engine according to the invention.
- the exhaust gas system 1 comprises a housing 3 which has an inlet 5 and an outlet 7 and a filter 9 accommodated in the housing.
- the filter comprises channels 11A and 11B extending in the direction of flow and having porous walls 13.
- the channels are open at one end and closed at the other by means of an end plug 15, 17.
- the channels 11 A open at the inlet end 19 and closed at the outlet end 21 are then surrounded by channels 19B open at the outlet end 21and closed at the inlet end 19.
- the exhaust gas 19 is forced to flow through the walls 13.
- Figure 2 gives a detailed representation of the interior of the filter 9 in enlarged form. From the inlet end 19 onwards the walls 13 are coated with an SCR coating 25 over a first distance and coated with an AMOX catalyst coating 29 from the outlet end 21 onwards over a second distance 27. The end plugs 17 in the outlet ends have a length that at least equals said second distance 27 over which the walls are coated with the AMOX catalyst coating 29. As a result, one side of the wall sections coated with the AMOX catalyst coating is covered and the exhaust gas cannot but flow first through the wall sections 13 coated with SCR catalyst coating 25. Only then can the exhaust gas flow past the wall sections 13 coated with the AMOX catalyst coating 29.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
An exhaust gas system for a diesel engine comprises a filter 9 that includes channels extending in the direction of flow and having porous walls 13 which are clad with an SCR catalyst coating 25. Neighbouring channels are alternately shut off by end plugs 15, 17 at the inlet end and the outlet end, as a result of which the exhaust gas is forced to flow through the walls. The walls 13 are coated with an AMOX catalyst coating 29 from the end 21 over a distance 27. The end plugs 17 in the outlet ends have a length that at least equals said distance 27. As a result, one side of the wall sections coated with the AMOX catalyst coating is covered and the exhaust gas cannot but flow first through the wall sections coated with SCR catalyst coating 25 and only then can the exhaust gas flow past the wall sections coated with the AMOX catalyst coating 29.
Description
Exhaust gas system for a diesel engine
DESCRIPTION:
Field of the invention
The invention relates to an exhaust gas system for a diesel engine comprising an inlet and an outlet and a filter located in between comprising a plurality of channels arranged next to one another and having porous walls, where neighbouring channels are alternately shut off by an end plug at the inlet end and the outlet end, as a result of which the exhaust gas is forced to flow through the walls which are at least partially coated with a first coating. State of the art
An exhaust system of this type is generally known in the form of a diesel particle filter (DPF) in which the walls of the channels are coated with a selective catalytic reduction catalyst (SCR catalyst). The end plugs are generally installed before the walls are coated.
Once the exhaust gas has flown through the DFP with the SCR catalyst on it, it is desirable to have the filtered exhaust gas flow past an ammonia oxidation catalyst (AMOX catalyst). Summary of the invention
It is an object of the invention to provide an exhaust gas system of the type defined in the opening paragraph which is advantageously provided with an AMOX catalyst. For this purpose the exhaust gas system according to the invention is characterized in that from the outlet end to a distance from this outlet end, the walls are coated with a second coating, where the end plugs in the outlet ends have a length that is at least equal to said distance over which the walls are coated with the second coating. If the AMOX catalyst has not been coated in the place of the end plugs on the walls of the channels, the exhaust gas will partially flow through the AMOX catalyst coated wall sections and partially through the
SCR catalyst coated wall sections. By covering one side of the sections of the walls which are coated with the AMOX catalyst, the exhaust gas cannot but flow first through the SCR catalyst coated sections of the walls. Not until then can the exhaust gas flow past the wall sections coated with the AMOX catalyst coating. By shutting off the wall sections coated with the AMOX catalyst coating by means of the end plugs, no extra closing means are required. Only the end plugs in the outlet end need to be made longer than normal.
Brief description of the drawing figures. The invention will be further described below in more detail with reference to an embodiment of the exhaust gas system according to the invention represented in the drawing figures, in which:
Figure 1 shows an embodiment of the exhaust gas system according to the invention in longitudinal section; and
Figure 2 gives a detailed representation of the interior of the exhaust gas system shown in Fig. 1.
Detailed description of the drawing figures Figure 1 shows an embodiment of the exhaust gas system for a diesel engine according to the invention. The exhaust gas system 1 comprises a housing 3 which has an inlet 5 and an outlet 7 and a filter 9 accommodated in the housing. The filter comprises channels 11A and 11B extending in the direction of flow and having porous walls 13. The channels are open at one end and closed at the other by means of an end plug 15, 17. The channels 11 A open at the inlet end 19 and closed at the outlet end 21 are then surrounded by channels 19B open at the outlet end 21and closed at the inlet end 19. As a result, the exhaust gas 19 is forced to flow through the walls 13.
Figure 2 gives a detailed representation of the interior of the filter 9 in enlarged form. From the inlet end 19 onwards the walls 13 are coated with an SCR coating 25 over a first distance and coated with an AMOX catalyst coating 29 from the outlet end 21 onwards over a second distance 27. The end plugs 17 in the outlet ends have a length that at least equals said second distance 27 over which the walls are coated with the AMOX catalyst coating 29. As a result, one side of the wall sections coated with the AMOX catalyst coating is covered and the exhaust gas cannot but flow first through the wall sections 13 coated with
SCR catalyst coating 25. Only then can the exhaust gas flow past the wall sections 13 coated with the AMOX catalyst coating 29.
Albeit the invention has been elucidated in the foregoing with reference to the drawing figures, it should be set out that the invention is not by any manner or means restricted to the embodiments shown in the drawing figures. The invention also extends to any embodiments deviating from the embodiments shown in the drawing figures within the spirit and scope defined by the claims.
Claims
1. An exhaust gas system (1) for a diesel engine comprising an inlet (5) and an outlet (7) and a filter (9) located in between comprising a plurality of channels (11A, 11B) arranged next to one another and having porous walls (13), where neighbouring channels are alternately shut off by an end plug (15, 17) at the inlet end (19) and the outlet end (21), as a result of which the exhaust gas is forced to flow through the walls (13) which are at least partially coated with a first coating (25), characterized in that from the outlet end (21) to a distance (27) from this outlet end, the walls (13) are coated with a second coating (29), where the end plugs (17) in the outlet ends have a length that is at least equal to said distance (27) over which the walls (13) are coated with the second coating (29).
2. An exhaust gas system (1) as claimed in claim 1, characterized in that the filter (9) is a diesel particle filter, in that the first coating (25) is a selective catalytic reduction coating and in that the second coating (29) is an ammonia oxidation catalyst coating.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12726912.4A EP2705226A1 (en) | 2011-05-02 | 2012-05-01 | Exhaust system for a diesel engine |
US14/115,207 US20150113965A1 (en) | 2011-05-02 | 2012-05-01 | Exhaust system for a diesel engine |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL2006705 | 2011-05-02 | ||
NL2006705 | 2011-05-02 | ||
NL2006993 | 2011-06-24 | ||
NL2006993A NL2006993C2 (en) | 2011-05-02 | 2011-06-24 | EXHAUST GAS SYSTEM FOR A DIESEL ENGINE. |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2012158022A1 true WO2012158022A1 (en) | 2012-11-22 |
Family
ID=46246154
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/NL2012/050304 WO2012158022A1 (en) | 2011-05-02 | 2012-05-01 | Exhaust system for a diesel engine |
Country Status (4)
Country | Link |
---|---|
US (1) | US20150113965A1 (en) |
EP (1) | EP2705226A1 (en) |
NL (1) | NL2006993C2 (en) |
WO (1) | WO2012158022A1 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103670611A (en) * | 2013-12-16 | 2014-03-26 | 上海三一重机有限公司 | Tail gas treatment device and diesel engine comprising same |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2897731B1 (en) * | 2012-09-24 | 2024-05-01 | Smiths Detection-Watford Limited | On-demand vapour generator |
GB2531338B (en) * | 2014-10-17 | 2018-09-12 | Jaguar Land Rover Ltd | Particulate filter |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001012320A1 (en) * | 1999-08-13 | 2001-02-22 | Johnson Matthey Public Limited Company | Catalytic wall-flow filter |
WO2010004320A2 (en) * | 2008-07-09 | 2010-01-14 | Johnson Matthey Public Limited Company | Exhaust system for a lean burn ic engine |
WO2011045847A1 (en) * | 2009-10-13 | 2011-04-21 | 日産ディーゼル工業株式会社 | Exhaust purification device for engine |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8844274B2 (en) * | 2009-01-09 | 2014-09-30 | Ford Global Technologies, Llc | Compact diesel engine exhaust treatment system |
US8246922B2 (en) * | 2009-10-02 | 2012-08-21 | Basf Corporation | Four-way diesel catalysts and methods of use |
EP2501464B1 (en) * | 2009-11-20 | 2018-02-28 | Basf Se | Zoned catalyzed soot filter |
US8591820B2 (en) * | 2011-03-11 | 2013-11-26 | Corning Incorporated | Honeycomb filters for reducing NOx and particulate matter in diesel engine exhaust |
US8722000B2 (en) * | 2011-03-29 | 2014-05-13 | Basf Corporation | Multi-component filters for emissions control |
US8789356B2 (en) * | 2011-07-28 | 2014-07-29 | Johnson Matthey Public Limited Company | Zoned catalytic filters for treatment of exhaust gas |
-
2011
- 2011-06-24 NL NL2006993A patent/NL2006993C2/en active
-
2012
- 2012-05-01 EP EP12726912.4A patent/EP2705226A1/en not_active Withdrawn
- 2012-05-01 WO PCT/NL2012/050304 patent/WO2012158022A1/en active Application Filing
- 2012-05-01 US US14/115,207 patent/US20150113965A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2001012320A1 (en) * | 1999-08-13 | 2001-02-22 | Johnson Matthey Public Limited Company | Catalytic wall-flow filter |
WO2010004320A2 (en) * | 2008-07-09 | 2010-01-14 | Johnson Matthey Public Limited Company | Exhaust system for a lean burn ic engine |
WO2011045847A1 (en) * | 2009-10-13 | 2011-04-21 | 日産ディーゼル工業株式会社 | Exhaust purification device for engine |
Non-Patent Citations (1)
Title |
---|
See also references of EP2705226A1 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103670611A (en) * | 2013-12-16 | 2014-03-26 | 上海三一重机有限公司 | Tail gas treatment device and diesel engine comprising same |
Also Published As
Publication number | Publication date |
---|---|
US20150113965A1 (en) | 2015-04-30 |
EP2705226A1 (en) | 2014-03-12 |
NL2006993C2 (en) | 2012-11-05 |
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