US20150101315A1 - Exhaust gas apparatus and method for the regeneration of a nox trap and a particle filter - Google Patents
Exhaust gas apparatus and method for the regeneration of a nox trap and a particle filter Download PDFInfo
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- US20150101315A1 US20150101315A1 US14/576,251 US201414576251A US2015101315A1 US 20150101315 A1 US20150101315 A1 US 20150101315A1 US 201414576251 A US201414576251 A US 201414576251A US 2015101315 A1 US2015101315 A1 US 2015101315A1
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- Prior art keywords
- exhaust gas
- cold flame
- nox trap
- exhaust
- particle filter
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- 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
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0821—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with particulate filters
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- 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
- F01N3/023—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 using means for regenerating the filters, e.g. by burning trapped particles
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- 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
- F01N3/023—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 using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/025—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 using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
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- 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
- F01N3/023—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 using means for regenerating the filters, e.g. by burning trapped particles
- F01N3/025—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 using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust
- F01N3/0253—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 using means for regenerating the filters, e.g. by burning trapped particles using fuel burner or by adding fuel to exhaust adding fuel to exhaust gases
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- 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
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0828—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents characterised by the absorbed or adsorbed substances
- F01N3/0842—Nitrogen oxides
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- 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
- F01N3/30—Arrangements for supply of additional air
- F01N3/306—Preheating additional air
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- 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
- F01N2240/00—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being
- F01N2240/30—Combination or association of two or more different exhaust treating devices, or of at least one such device with an auxiliary device, not covered by indexing codes F01N2230/00 or F01N2250/00, one of the devices being a fuel reformer
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- 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
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- 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
- F01N2250/04—Combinations of different methods of purification afterburning and catalytic conversion
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- 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
- F01N2270/00—Mixing air with exhaust gases
- F01N2270/04—Mixing air with exhaust gases for afterburning
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- 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
- F01N2610/00—Adding substances to exhaust gases
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- 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
- F01N3/36—Arrangements for supply of additional fuel
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- 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 present invention relates to apparatus for regenerating a NOx trap and the regeneration of a particle filter and a NOx trap in a single operation.
- the invention is also related to a method for the regeneration of a NOx trap and a method for regenerating a particle filter and a NOx trap in a single operation.
- the invention further relates to the use of the apparatus and the methods with a compression ignition engine, i.e. what is often called a diesel engine.
- the cold flame is a phenomenon which has so far not received to much attention.
- a cold flame the fuel is partially oxidized in preheated air and the temperature is kept constant at about 450° C., and it is independent of air/fuel ratio and residence time.
- the cold flame process only 2-20% of the calorific value of the fuel is released, and this heat is used to evaporate the fuel, giving a homogenous gaseous fuel.
- the gas was able to remove carbon deposits from the reactor walls. The reason for this has not been established yet, but is thought to be due to free radicals that are present in the cold flame gas, i.e. the partially oxidized, gaseous fuel.
- Exhaust from compression ignition engines (often imprecisely called diesel engines), which operate on excess air, contains mainly particulates, NOx and incomplete combustion products (HC and CO). Particulates can be removed using a filter downstream from the engine. After a while, the filter will be blocked and need to be regenerated. This is done by increasing the temperature in the exhaust gas to above 600° C. under oxidizing conditions and thereby burning away the carbon deposits. In order to allow for continuous operation, it is common to have two filters in parallel and a valve which sends the majority of the exhaust to one of the filters while the other is being regenerated.
- Incomplete combustion products can be removed by an oxidation catalyst.
- NOx on the other hand, can only be removed catalytically if the exhaust gas is slightly reducing (as in an Otto engine). This is not normally the case in a compression ignition engine. Since the regenerating of the particle requires an oxidizing environment while the regenerating of the NOx trap requires a slightly reducing environment, there has not been available a method for regenerating the particle filter and the NOx trap in a single operation.
- One way to reduce NOx emissions in a diesel engine is to recirculate some of the exhaust back into the engine (EGR).
- An NOx absorbent can be made from barium carbonate. During absorption, the absorbent is converted to barium nitrate and releases CO 2 at the same time. When the absorbent is saturated, it can be regenerated using CO in that the barium nitrate is converted back to barium carbonate and release N 2 gas.
- a particle filter+an NOx absorber (NOx trap)+an oxidation catalyst is used for a complete treatment of the exhaust gas.
- NOx trap an NOx absorber
- the problem is, as already mentioned, that the particle filter has to be regenerated under high temperature (600° C.) in an oxidizing environment while the NOx absorber is regenerated at lower temperatures in a reducing environment (500° C. with CO gas). This means that two process operations are needed in order to clean both the particle filter and the NOx trap, as described in the American patent U.S. Pat. No. 6,955,042.
- a further objective of the present invention has been to find a way to regenerate the particle filter and the NOx trap in a single operation.
- an exhaust gas cleaning apparatus for the cleaning of exhaust gas flowing in an exhaust gas conduit.
- the exhaust cleaning apparatus comprises at least one NOx trap arranged in the exhaust gas conduit such that the NOx trap at least partially removes NOx from the exhaust gas flowing through the exhaust gas conduit.
- the exhaust gas cleaning apparatus further comprises a cold flame vaporizer wherein fuel is partially oxidized in preheated air to form a cold flame gas.
- the cold flame vaporizer is arranged in fluid communication with the exhaust gas conduit such that the cold flame gas can flow through the NOx trap in the exhaust gas conduit, thereby regenerating the NOx trap.
- the cold flame vaporizer is a standard cold flame vaporizer in which the fuel can be partially oxidized in preheated air.
- air and fuel is mixed in a proportion of typically 0.3-1.0 (1.0 is stoichiometric air/fuel ratio), but only a small fraction of the air is used in the cold flame reaction.
- the exhaust gas conduit may be a pipe or similar of any cross sectional shape, or the exhaust gas conduit may be formed as internal conduits in a larger body.
- the means for preheating the air may be a heat exchanger in which the heat of the exhaust gas warms up the air. It would also be possible to use other means for preheating the, for instance electrical heating means.
- the cold flame vaporizer may be arranged outside the exhaust gas conduit and, if necessary, connected to the exhaust gas conduit with fluid lines. If the cold flame vaporizer is mounted to the exhaust gas conduit, then there may only be necessary to provide openings into the exhaust gas conduit, while if the cold flame vaporizer is arranged separate from the exhaust gas conduit, fluid lines will be provided connecting the cold flame vaporizer and the exhaust gas conduit.
- the cold flame vaporizer can also be arranged inside the exhaust gas conduit. In that case, there is no need for fluid lines as the cold flame vaporizer may just release the cold flame gas into the exhaust gas conduit through openings including said valve means.
- the exhaust gas cleaning apparatus further comprises valve means controlling the flow of cold flame gas from the cold flame vaporizer into the exhaust gas conduit.
- the exhaust gas cleaning apparatus is further provided with one or more valve means which controls the flow of exhaust gas through the exhaust gas conduit.
- the flow of exhaust gas can therefore at least partially be shut off.
- valve means may be controlled such that the NOx trap is regenerated, for instance, at specific time intervals, or when the pressure drop across NOx trap reaches a predetermined level indicating that the NOx trap needs to be regenerated.
- the exhaust gas cleaning apparatus comprises a fuel supply which is arranged in fluid communication with the cold flame vaporizer.
- the exhaust gas cleaning apparatus also comprises an air supply and means for preheating the air, the air supply being in fluid communication with the cold flame vaporizer.
- the exhaust gas apparatus comprises one or more valve means controlling the flow of fuel and preheated air to said cold flame vaporizer.
- an exhaust gas apparatus for the cleaning of exhaust gas, the exhaust gas apparatus comprising an exhaust conduit section which is formed with at least two separate flow paths. Each flow path is provided with a particle filter for the removal of particulate matter from the exhaust gas and an NOx trap for the removal of NOx from the exhaust gas.
- the exhaust gas apparatus further comprises at least one cold flame vaporizer in which fuel is partially oxidized in preheated air to form a cold flame gas.
- the cold flame vaporizer is arranged in fluid communication with each of the flow paths in the exhaust conduit section such that the cold flame gas can flow through the particle filter and the NOx trap.
- valve means for controlling the flow of cold flame gas from the cold flame vaporizer to each flow path in the exhaust conduit section, whereby both the particle filter and the NOx trap in at least one of the flow paths can be regenerated in a single operation.
- the cold flame vaporizer is a standard cold flame vaporizer in which the fuel can be partially oxidized in preheated air.
- air and fuel is mixed in a proportion of typically 0.3-1.0 (1.0 is stoichiometric air/fuel ratio), but only a small fraction of the air is used in the cold flame reaction.
- the exhaust gas conduit may be a pipe or similar of any cross sectional shape, or the exhaust gas conduit may be formed as internal conduits in a larger body.
- the means for preheating the air may be a heat exchanger in which the heat of the exhaust gas warms up the air. It would also be possible to use other means for preheating the air, for instance electrical heating means.
- the flow paths may be formed by providing the exhaust gas return conduit, at least along a part of its length, with one or more partitions such that two or more separate flow paths for the exhaust gas are formed in the exhaust conduit section. These partitions may be one or more plates dividing the exhaust gas return conduit in two or more flow paths. Alternatively, the flow paths may be formed by providing the exhaust gas return conduit with at least two separate conduits through which the exhaust gas can flow.
- the cold flame vaporizer may be arranged outside the exhaust conduit section and, if necessary, connected to the exhaust conduit section with fluid lines. If the cold flame vaporizer is mounted to the exhaust conduit section, then there may only be necessary to provide openings into the exhaust conduit section, while if the cold flame vaporizer is arranged separate from the exhaust conduit section, fluid lines will be provided connecting the cold flame vaporizer and the exhaust conduit section.
- the at least one cold flame vaporizer can also be arranged inside the exhaust conduit section. In that case, there is no need for fluid lines as the cold flame vaporizer may just release the cold flame gas into the exhaust gas conduit through openings including said valve means.
- the exhaust gas apparatus is preferably provided with one or more valve means which controls the flow of exhaust gas through the flow paths of the exhaust conduit section.
- the valve means may close off one or more flow paths for the flow of exhaust gas.
- the exhaust gas apparatus is preferably also provided with one or more valve means controlling the flow of cold flame gas from the at least one cold flame vaporizer to the flow paths of exhaust conduit section and the particle filters and NOx traps in the flow paths. These valve means may be controlled such that the particle filters and NOx traps are regenerated, for instance, at specific time intervals, or when the pressure drop across a particle filter and/or NOx trap reaches a predetermined level indicating that the particle filter and the NOx trap needs to be regenerated.
- the exhaust gas apparatus further comprises a fuel supply which is arranged in fluid communication with the at least one cold flame vaporizer.
- a fuel supply which is arranged in fluid communication with the at least one cold flame vaporizer.
- valve means controlling the flow of fuel to the at least one cold flame vaporizer.
- the exhaust gas apparatus also comprises an air supply and, as mentioned above, means for preheating the air, the air supply being arranged in fluid communication with the at least one cold flame vaporizer.
- valve means controlling the flow of preheated air to the at least one cold flame vaporizer.
- the NOx trap is preferably arranged downstream of the particle filter so that particulate matter in the exhaust gas can be removed before reaching the NOx trap.
- the exhaust gas apparatus also comprises an oxidation catalyst arranged downstream of the particle filter and the NOx trap.
- the method comprises the following steps:
- the cold flame gas may be provided by partially oxidizing fuel in preheated air in a cold flame vaporizer which is arranged in fluid communication with the exhaust conduit.
- a cold flame vaporizer air and fuel is mixed in a proportion of typically 0.3-1.0, but only a small fraction of the air is used in the cold flame reaction.
- the method also comprises the step of arranging the NOx trap downstream of the particle filter.
- the method also comprises the step of providing one or more valve means for controlling the flow of cold flame gas from the cold flame vaporizer into the exhaust gas conduit.
- the method also comprises the step of providing a fuel supply arranged in fluid communication with the cold flame vaporizer, and an air supply and heating means for the preheating of the air, the air supply being arranged in fluid communication with the cold flame vaporizer. Furthermore, the method comprises the step of providing valve means for controlling the flow of fuel and preheated air to the cold flame vaporizer.
- the cleaning means are provided in each of the flow paths and comprises
- the cold flame gas may be provided by partially oxidizing fuel in preheated air in at least one cold flame vaporizer which is arranged in fluid communication with all the flow paths of the exhaust conduit section.
- air and fuel is mixed in a proportion of 0.3-1.0 (again 1.0 is stoichiometric air/fuel ratio), but only a small fraction of the air is used in the cold flame reaction.
- the method also comprises the step of providing one or more valve means for separately controlling the flow of cold flame gas from the cold flame vaporizer into each flow path of the exhaust gas conduit.
- the method also comprises the step of providing a fuel supply arranged in fluid communication with the cold flame vaporizer, and an air supply and heating means for the preheating of the air, the air supply being arranged in fluid communication with the cold flame vaporizer.
- the method also comprises the step of providing one or more valve means for controlling the flow of fuel and preheated air to the cold flame vaporizer.
- the method also comprises the step of arranging, in each flow path in the exhaust conduit section, the NOx trap downstream of the respective particle filter.
- the method also comprises the step of arranging an oxidation catalyst in the exhaust conduit section downstream of the particle filter and the NOx trap.
- the cleaning means comprising a particle filter and an NOx trap, with a compression ignition engine.
- a cold flame is one method to achieve a partially oxidized fuel gas among a number of other partially oxidized fuel gases with the same properties.
- the present invention should therefore not be seen as limited to only a cold flame gas, but should include other partially oxidized fuel gases with the same or similar properties as the cold flame gas.
- FIG. 1 illustrates an embodiment of the invention where a NOx trap is arranged in an exhaust conduit.
- FIG. 2 a illustrates an embodiment of the invention where a particle filter and a NOx trap is arranged in a section of an exhaust conduit which is.
- FIG. 2 b is an illustration of the section A-A through the particle filter in FIG. 2 a.
- FIG. 2 c is an illustration of the section B-B through the NOx trap in FIG. 2 a.
- FIG. 3 a illustrates a similar embodiment of the invention where a particle filter and a NOx trap is arranged in a section of an exhaust conduit.
- FIG. 3 b an illustration of the section A-A through the particle filter in FIG. 3 a.
- FIG. 3 c an illustration of the section B-B through the particle filter in FIG. 3 a.
- FIG. 1 illustrates a first embodiment of the invention.
- An exhaust gas flows in an exhaust gas conduit 14 with valve means 18 controlling the flow of exhaust gas through a NOx trap 30 .
- a cold flame vaporizer 11 with a fuel supply 12 , which may be diesel or heavy fuel oil, and an air supply 13 .
- the air supply may be provided with an air intake 15 including an air filter (not shown).
- Valve means 16 , 19 controls the flow of air through fluid line 25 and flow of fuel through fluid line 26 to the cold flame vaporizer 11 respectively.
- valve means 18 When the NOx trap needs to be regenerated, valve means 18 is preferably closed and valve means 17 is opened such that cold flame gas can flow through the NOx trap, thereby regenerating it.
- FIG. 2 a - 2 c there is shown a second embodiment of the invention.
- Exhaust gas indicated by arrow 20 on the figure, flows in exhaust gas conduit 14 and through an exhaust conduit section 10 comprising at least a particle filter 30 and a NOx trap 40 .
- an oxidation catalyst 50 Further downstream there is provided an oxidation catalyst 50 .
- the oxidation catalyst could also be placed together with the particle filter 30 and the NOx trap 40 .
- the exhaust conduit section 10 is formed with two separate flow paths as can easily be seen on FIGS. 2 b and 2 c, which illustrate sections through the particle filter 30 and the NOx trap 40 respectively.
- the two flow paths are formed by a partition 25 dividing the exhaust conduit section 10 in two parts in the longitudinal direction.
- a particle filter 30 and a NOx trap 40 In each flow path there is provided a particle filter 30 and a NOx trap 40 .
- one of the flow paths 41 , 42 is closed for the flow of exhaust 20 while the other flow path is kept open for the flow of exhaust gas.
- Valve means 17 are opened and cold flame gas flows through the flow path 41 , 42 which has been for the flow of exhaust gas.
- the particle filter 30 and the NOx trap 40 in that flow path are thereby regenerated in one operation while exhaust gas is allowed to flow through the other flow path. There is therefore not necessary to stop the engine from which the exhaust gas originates.
- valve means switches positions so that the exhaust gas now flows through the flow path 41 , 42 containing the regenerated particle filter and NOx trap, while the cold flame gas is directed through the flow path 41 , 42 in which the particle filter 30 and NOx trap 40 is not yet regenerated.
- the regeneration of the particle filter 30 and the NOx trap 40 can thereby be carried out in one operation without having to stop the engine.
- the exhaust conduit section 10 is provided with only two flow paths 41 , 42 . It is however, possible to provide any number of flow paths for the exhaust gas through the exhaust conduit section 10
- FIG. 3 a - 3 c a very similar embodiment of the invention to the embodiment on FIG. 2 a - 2 c, is shown. Again the cold flame vaporizer 11 with its fuel supply 12 and air supply 13 is identical to what has already been described and will not be repeated.
- FIG. 3 a - 3 c The embodiment of the invention shown on FIG. 3 a - 3 c is also provided with two flow paths 34 , 35 through which the exhaust gas may flow, but are now in the form of two separate exhaust gas conduits. There is also provided fluid lines so that cold flame gas from the cold flame vaporizer 11 can flow through the two flow paths 34 , 35 .
- Flow paths 34 , 35 are provided with valve means 32 , 33 which control the flow of exhaust gas through the two flow paths.
- Valve means 17 control the flow of cold flame gas to through the two flow paths 34 , 35 .
- Both flow paths are provided with a exhaust conduit section 10 comprising at least a particle filter 30 and a NOx trap 40 .
- the exhaust conduit section 10 comprises an oxidation catalyst, but this is optional as mentioned above.
- one of the flow paths 32 , 33 is closed for the flow of exhaust gas by valve means 32 , 33 and the one of valve means 17 opens such that cold flame gas from the cold flame vaporizer 11 is directed to and flows through the exhaust conduit section 10 which has been closed for the flow of exhaust gas.
- the particle filter 30 and the NOx trap in one of the exhaust conduit sections 34 , 35 are regenerated by the cold flame gas in one operation.
- FIGS. 3 b and 3 c are sections through the particle filters 30 and the NOx trap 40 respectively. As can be seen on the figure, the filters cover substantially the whole cross section as opposed to the embodiment shown in FIG. 2 a - 2 c.
- FIG. 3 a - 3 c are provided with two flow paths 34 , 35 , but it would be possible to provide as many flow paths as is necessary for any given purpose.
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- 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)
- Processes For Solid Components From Exhaust (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
- Combustion Methods Of Internal-Combustion Engines (AREA)
- Electrical Control Of Air Or Fuel Supplied To Internal-Combustion Engine (AREA)
Abstract
Exhaust gas apparatus for the cleaning of exhaust gas where the exhaust gas apparatus comprises an exhaust conduit section which is formed with at least two separate flow paths. Each flow path is provided with a particle filter for the removal of particulate matter from the exhaust gas, an NOx trap for the removal of NOx from the exhaust gas. The exhaust gas apparatus further comprises at least one cold flame vaporizer in which fuel is partially oxidized in preheated air to form a cold flame gas where the cold flame vaporizer is arranged in fluid communication with each of the flow paths in the exhaust conduit section such that the cold flame gas can flow through the particle filter and the NOx trap, and valve means for controlling the flow of cold flame gas from the cold flame vaporizer to each flow path in the exhaust conduit section. Thereby, both the particle filter and the NOx trap in at least one of the flow paths can be regenerated in a single operation. There is also provided a method for regenerating cleaning means for exhaust gas where the cleaning means comprises an NOx trap and possibly a particle filter.
Description
- This application is a continuation application of U.S. Ser. No. 12/675,400, filed Feb. 26, 2010, which was a National Stage application of PCT/NO2008/000310 filed Sep. 1, 2008, and claims the benefit of U.S. Provisional application 60/968,899 filed Aug. 30, 2007.
- The present invention relates to apparatus for regenerating a NOx trap and the regeneration of a particle filter and a NOx trap in a single operation. The invention is also related to a method for the regeneration of a NOx trap and a method for regenerating a particle filter and a NOx trap in a single operation. The invention further relates to the use of the apparatus and the methods with a compression ignition engine, i.e. what is often called a diesel engine.
- The cold flame is a phenomenon which has so far not received to much attention. In a cold flame the fuel is partially oxidized in preheated air and the temperature is kept constant at about 450° C., and it is independent of air/fuel ratio and residence time. In the cold flame process, only 2-20% of the calorific value of the fuel is released, and this heat is used to evaporate the fuel, giving a homogenous gaseous fuel. During developmental work, it has been observed that the gas was able to remove carbon deposits from the reactor walls. The reason for this has not been established yet, but is thought to be due to free radicals that are present in the cold flame gas, i.e. the partially oxidized, gaseous fuel.
- A more complete description of the cold flame gas phenomenon can be found in the American patent, U.S. Pat. No. 6,793,693.
- Exhaust from compression ignition engines (often imprecisely called diesel engines), which operate on excess air, contains mainly particulates, NOx and incomplete combustion products (HC and CO). Particulates can be removed using a filter downstream from the engine. After a while, the filter will be blocked and need to be regenerated. This is done by increasing the temperature in the exhaust gas to above 600° C. under oxidizing conditions and thereby burning away the carbon deposits. In order to allow for continuous operation, it is common to have two filters in parallel and a valve which sends the majority of the exhaust to one of the filters while the other is being regenerated.
- Incomplete combustion products (HC and CO) can be removed by an oxidation catalyst.
- NOx, on the other hand, can only be removed catalytically if the exhaust gas is slightly reducing (as in an Otto engine). This is not normally the case in a compression ignition engine. Since the regenerating of the particle requires an oxidizing environment while the regenerating of the NOx trap requires a slightly reducing environment, there has not been available a method for regenerating the particle filter and the NOx trap in a single operation.
- One way to reduce NOx emissions in a diesel engine is to recirculate some of the exhaust back into the engine (EGR).
- While the above method reduces the NOx formation, it is also possible to remove NOx by inserting an NOx absorbent, as described in several patent documents, for instance U.S. Pat. No. 5,974,791. An NOx absorbent can be made from barium carbonate. During absorption, the absorbent is converted to barium nitrate and releases CO2 at the same time. When the absorbent is saturated, it can be regenerated using CO in that the barium nitrate is converted back to barium carbonate and release N2 gas.
- For a complete treatment of the exhaust gas, a particle filter+an NOx absorber (NOx trap)+an oxidation catalyst is used. The problem is, as already mentioned, that the particle filter has to be regenerated under high temperature (600° C.) in an oxidizing environment while the NOx absorber is regenerated at lower temperatures in a reducing environment (500° C. with CO gas). This means that two process operations are needed in order to clean both the particle filter and the NOx trap, as described in the American patent U.S. Pat. No. 6,955,042.
- There is therefore an objective of the present invention to find a new way to regenerate an NOx trap.
- A further objective of the present invention has been to find a way to regenerate the particle filter and the NOx trap in a single operation.
- These objectives are achieved by the present invention as defined in the independent claims. Further embodiments of the invention is defined in the dependent claims.
- There is provided an exhaust gas cleaning apparatus for the cleaning of exhaust gas flowing in an exhaust gas conduit. The exhaust cleaning apparatus comprises at least one NOx trap arranged in the exhaust gas conduit such that the NOx trap at least partially removes NOx from the exhaust gas flowing through the exhaust gas conduit. The exhaust gas cleaning apparatus further comprises a cold flame vaporizer wherein fuel is partially oxidized in preheated air to form a cold flame gas. The cold flame vaporizer is arranged in fluid communication with the exhaust gas conduit such that the cold flame gas can flow through the NOx trap in the exhaust gas conduit, thereby regenerating the NOx trap.
- The cold flame vaporizer is a standard cold flame vaporizer in which the fuel can be partially oxidized in preheated air. In the cold flame vaporizer air and fuel is mixed in a proportion of typically 0.3-1.0 (1.0 is stoichiometric air/fuel ratio), but only a small fraction of the air is used in the cold flame reaction.
- The exhaust gas conduit may be a pipe or similar of any cross sectional shape, or the exhaust gas conduit may be formed as internal conduits in a larger body.
- The means for preheating the air may be a heat exchanger in which the heat of the exhaust gas warms up the air. It would also be possible to use other means for preheating the, for instance electrical heating means.
- The cold flame vaporizer may be arranged outside the exhaust gas conduit and, if necessary, connected to the exhaust gas conduit with fluid lines. If the cold flame vaporizer is mounted to the exhaust gas conduit, then there may only be necessary to provide openings into the exhaust gas conduit, while if the cold flame vaporizer is arranged separate from the exhaust gas conduit, fluid lines will be provided connecting the cold flame vaporizer and the exhaust gas conduit.
- In an embodiment of the invention, the cold flame vaporizer can also be arranged inside the exhaust gas conduit. In that case, there is no need for fluid lines as the cold flame vaporizer may just release the cold flame gas into the exhaust gas conduit through openings including said valve means.
- The exhaust gas cleaning apparatus further comprises valve means controlling the flow of cold flame gas from the cold flame vaporizer into the exhaust gas conduit.
- The exhaust gas cleaning apparatus is further provided with one or more valve means which controls the flow of exhaust gas through the exhaust gas conduit. When regenerating the NOx trap in the exhaust gas conduit, the flow of exhaust gas can therefore at least partially be shut off.
- These valve means may be controlled such that the NOx trap is regenerated, for instance, at specific time intervals, or when the pressure drop across NOx trap reaches a predetermined level indicating that the NOx trap needs to be regenerated.
- Furthermore, the exhaust gas cleaning apparatus comprises a fuel supply which is arranged in fluid communication with the cold flame vaporizer. The exhaust gas cleaning apparatus also comprises an air supply and means for preheating the air, the air supply being in fluid communication with the cold flame vaporizer. In order to control the flow of fuel and preheated air into the cold flame vaporizer, the exhaust gas apparatus comprises one or more valve means controlling the flow of fuel and preheated air to said cold flame vaporizer.
- There is also provided an exhaust gas apparatus for the cleaning of exhaust gas, the exhaust gas apparatus comprising an exhaust conduit section which is formed with at least two separate flow paths. Each flow path is provided with a particle filter for the removal of particulate matter from the exhaust gas and an NOx trap for the removal of NOx from the exhaust gas. The exhaust gas apparatus further comprises at least one cold flame vaporizer in which fuel is partially oxidized in preheated air to form a cold flame gas. The cold flame vaporizer is arranged in fluid communication with each of the flow paths in the exhaust conduit section such that the cold flame gas can flow through the particle filter and the NOx trap. There is further provided valve means for controlling the flow of cold flame gas from the cold flame vaporizer to each flow path in the exhaust conduit section, whereby both the particle filter and the NOx trap in at least one of the flow paths can be regenerated in a single operation.
- The cold flame vaporizer is a standard cold flame vaporizer in which the fuel can be partially oxidized in preheated air. In the cold flame vaporizer air and fuel is mixed in a proportion of typically 0.3-1.0 (1.0 is stoichiometric air/fuel ratio), but only a small fraction of the air is used in the cold flame reaction.
- The exhaust gas conduit may be a pipe or similar of any cross sectional shape, or the exhaust gas conduit may be formed as internal conduits in a larger body.
- The means for preheating the air may be a heat exchanger in which the heat of the exhaust gas warms up the air. It would also be possible to use other means for preheating the air, for instance electrical heating means.
- The flow paths may be formed by providing the exhaust gas return conduit, at least along a part of its length, with one or more partitions such that two or more separate flow paths for the exhaust gas are formed in the exhaust conduit section. These partitions may be one or more plates dividing the exhaust gas return conduit in two or more flow paths. Alternatively, the flow paths may be formed by providing the exhaust gas return conduit with at least two separate conduits through which the exhaust gas can flow.
- The cold flame vaporizer may be arranged outside the exhaust conduit section and, if necessary, connected to the exhaust conduit section with fluid lines. If the cold flame vaporizer is mounted to the exhaust conduit section, then there may only be necessary to provide openings into the exhaust conduit section, while if the cold flame vaporizer is arranged separate from the exhaust conduit section, fluid lines will be provided connecting the cold flame vaporizer and the exhaust conduit section.
- In an embodiment of the invention, the at least one cold flame vaporizer can also be arranged inside the exhaust conduit section. In that case, there is no need for fluid lines as the cold flame vaporizer may just release the cold flame gas into the exhaust gas conduit through openings including said valve means.
- The exhaust gas apparatus is preferably provided with one or more valve means which controls the flow of exhaust gas through the flow paths of the exhaust conduit section. The valve means may close off one or more flow paths for the flow of exhaust gas. The exhaust gas apparatus is preferably also provided with one or more valve means controlling the flow of cold flame gas from the at least one cold flame vaporizer to the flow paths of exhaust conduit section and the particle filters and NOx traps in the flow paths. These valve means may be controlled such that the particle filters and NOx traps are regenerated, for instance, at specific time intervals, or when the pressure drop across a particle filter and/or NOx trap reaches a predetermined level indicating that the particle filter and the NOx trap needs to be regenerated.
- The exhaust gas apparatus further comprises a fuel supply which is arranged in fluid communication with the at least one cold flame vaporizer. Preferably, there is also provided valve means controlling the flow of fuel to the at least one cold flame vaporizer.
- The exhaust gas apparatus also comprises an air supply and, as mentioned above, means for preheating the air, the air supply being arranged in fluid communication with the at least one cold flame vaporizer. Preferably, there is also provided valve means controlling the flow of preheated air to the at least one cold flame vaporizer.
- In each flow path, the NOx trap is preferably arranged downstream of the particle filter so that particulate matter in the exhaust gas can be removed before reaching the NOx trap.
- Preferably, the exhaust gas apparatus also comprises an oxidation catalyst arranged downstream of the particle filter and the NOx trap.
- There is also provided a method for regenerating an NOx trap which removes NOx from exhaust gas flowing in an exhaust gas conduit, the NOx trap being provided in the exhaust gas conduit, the method comprising the following steps:
-
- providing a cold flame gas,
- letting the cold flame gas flow through the NOx trap, thereby regenerating the NOx trap.
- There is also provided a method for regenerating cleaning means for exhaust gas flowing in an exhaust gas conduit where the cleaning means comprises a particle filter for the removal of particulate matter from the exhaust gas and an NOx trap for the removal of NOx from the exhaust gas wherein the particle filter and the NOx trap being arranged in the exhaust gas conduit. The method comprises the following steps:
-
- providing a cold flame gas,
- letting the cold flame gas flow through the particle filter and the NOx trap, thereby regenerating both the particle filter and the NOx trap in a single operation.
- Again, the cold flame gas may be provided by partially oxidizing fuel in preheated air in a cold flame vaporizer which is arranged in fluid communication with the exhaust conduit. In the cold flame vaporizer air and fuel is mixed in a proportion of typically 0.3-1.0, but only a small fraction of the air is used in the cold flame reaction.
- In order to remove particulate matter from the exhaust gas before the exhaust gas passes through the NOx trap, the method also comprises the step of arranging the NOx trap downstream of the particle filter.
- The method also comprises the step of providing one or more valve means for controlling the flow of cold flame gas from the cold flame vaporizer into the exhaust gas conduit.
- The method also comprises the step of providing a fuel supply arranged in fluid communication with the cold flame vaporizer, and an air supply and heating means for the preheating of the air, the air supply being arranged in fluid communication with the cold flame vaporizer. Furthermore, the method comprises the step of providing valve means for controlling the flow of fuel and preheated air to the cold flame vaporizer.
- There is also provided a method for regenerating cleaning means for exhaust gas flowing through an exhaust conduit section of an exhaust gas conduit, the exhaust conduit section being formed with at least two flow paths for the exhaust gas. The cleaning means are provided in each of the flow paths and comprises
-
- a particle filter for the removal of particulate matter from the exhaust gas,
- an NOx trap for the removal of NOx from the exhaust gas
The method comprises the following steps: - providing a cold flame gas,
- letting the cold flame gas flow through the particle filter and the NOx trap in at least one of the flow paths of the exhaust conduit section.
The particle filter and the NOx trap in the at least one flow path are thereby both, in one operation, regenerated.
- As mentioned several times, the cold flame gas may be provided by partially oxidizing fuel in preheated air in at least one cold flame vaporizer which is arranged in fluid communication with all the flow paths of the exhaust conduit section. In the cold flame vaporizer air and fuel is mixed in a proportion of 0.3-1.0 (again 1.0 is stoichiometric air/fuel ratio), but only a small fraction of the air is used in the cold flame reaction.
- The method also comprises the step of providing one or more valve means for separately controlling the flow of cold flame gas from the cold flame vaporizer into each flow path of the exhaust gas conduit.
- Furthermore, the method also comprises the step of providing a fuel supply arranged in fluid communication with the cold flame vaporizer, and an air supply and heating means for the preheating of the air, the air supply being arranged in fluid communication with the cold flame vaporizer.
- The method also comprises the step of providing one or more valve means for controlling the flow of fuel and preheated air to the cold flame vaporizer.
- The method also comprises the step of arranging, in each flow path in the exhaust conduit section, the NOx trap downstream of the respective particle filter.
- The method also comprises the step of arranging an oxidation catalyst in the exhaust conduit section downstream of the particle filter and the NOx trap.
- There is also provided a use of the exhaust gas cleaning apparatus where the NOx trap is arranged in the exhaust conduit of a compression ignition engine.
- There is also provided a use of the exhaust gas apparatus wherein the exhaust conduit section forms part of the exhaust gas conduit of a compression ignition engine.
- There is also provided a use of the method for regenerating an NOx trap wherein the NOx trap is arranged in the exhaust conduit of a compression ignition engine.
- There is also provided a use of the methods for regenerating cleaning means for exhaust gas, the cleaning means comprising a particle filter and an NOx trap, with a compression ignition engine.
- Above, only a cold flame gas produced by a cold flame vaporizer has been mentioned. A cold flame is one method to achieve a partially oxidized fuel gas among a number of other partially oxidized fuel gases with the same properties. The present invention should therefore not be seen as limited to only a cold flame gas, but should include other partially oxidized fuel gases with the same or similar properties as the cold flame gas.
- In the following, an embodiment of the invention is disclosed in detail with reference to the enclosed figures, where
-
FIG. 1 illustrates an embodiment of the invention where a NOx trap is arranged in an exhaust conduit. -
FIG. 2 a illustrates an embodiment of the invention where a particle filter and a NOx trap is arranged in a section of an exhaust conduit which is. -
FIG. 2 b is an illustration of the section A-A through the particle filter inFIG. 2 a. -
FIG. 2 c is an illustration of the section B-B through the NOx trap inFIG. 2 a. -
FIG. 3 a illustrates a similar embodiment of the invention where a particle filter and a NOx trap is arranged in a section of an exhaust conduit. -
FIG. 3 b an illustration of the section A-A through the particle filter inFIG. 3 a. -
FIG. 3 c an illustration of the section B-B through the particle filter inFIG. 3 a. -
FIG. 1 illustrates a first embodiment of the invention. An exhaust gas flows in anexhaust gas conduit 14 with valve means 18 controlling the flow of exhaust gas through aNOx trap 30. - There is also provided a
cold flame vaporizer 11 with afuel supply 12, which may be diesel or heavy fuel oil, and anair supply 13. The air supply may be provided with anair intake 15 including an air filter (not shown). Valve means 16, 19 controls the flow of air throughfluid line 25 and flow of fuel throughfluid line 26 to thecold flame vaporizer 11 respectively. - When the NOx trap needs to be regenerated, valve means 18 is preferably closed and valve means 17 is opened such that cold flame gas can flow through the NOx trap, thereby regenerating it.
- In
FIG. 2 a-2 c there is shown a second embodiment of the invention. Exhaust gas, indicated byarrow 20 on the figure, flows inexhaust gas conduit 14 and through anexhaust conduit section 10 comprising at least aparticle filter 30 and aNOx trap 40. Further downstream there is provided anoxidation catalyst 50. The oxidation catalyst could also be placed together with theparticle filter 30 and theNOx trap 40. - The
exhaust conduit section 10 is formed with two separate flow paths as can easily be seen onFIGS. 2 b and 2 c, which illustrate sections through theparticle filter 30 and theNOx trap 40 respectively. The two flow paths are formed by apartition 25 dividing theexhaust conduit section 10 in two parts in the longitudinal direction. In each flow path there is provided aparticle filter 30 and aNOx trap 40. There is also provided means, like valve means, to control the flow of exhaust gas and cold flame gas through theexhaust conduit section 10. - There is also provided a
cold flame vaporizer 11 with afuel supply 12 and anair supply 13. There is no difference from the first embodiment of the invention shown inFIG. 1 , so it will not be described any further here. - When the particle filters 30 and the NOx traps 40, arranged in the
fluid paths exhaust conduit section 10, are to be regenerated using the cold flame gas from thecold flame vaporizer 11, one of theflow paths exhaust 20 while the other flow path is kept open for the flow of exhaust gas. Valve means 17 are opened and cold flame gas flows through theflow path particle filter 30 and theNOx trap 40 in that flow path are thereby regenerated in one operation while exhaust gas is allowed to flow through the other flow path. There is therefore not necessary to stop the engine from which the exhaust gas originates. - When the particle filter and the NOx trap in one
flow path flow path flow path particle filter 30 andNOx trap 40 is not yet regenerated. The regeneration of theparticle filter 30 and theNOx trap 40 can thereby be carried out in one operation without having to stop the engine. - In this embodiment of the invention, the
exhaust conduit section 10 is provided with only twoflow paths exhaust conduit section 10 - In
FIG. 3 a-3 c a very similar embodiment of the invention to the embodiment onFIG. 2 a-2 c, is shown. Again thecold flame vaporizer 11 with itsfuel supply 12 andair supply 13 is identical to what has already been described and will not be repeated. - The embodiment of the invention shown on
FIG. 3 a-3 c is also provided with twoflow paths cold flame vaporizer 11 can flow through the twoflow paths -
Flow paths flow paths - Both flow paths are provided with a
exhaust conduit section 10 comprising at least aparticle filter 30 and aNOx trap 40. OnFIG. 3 a it is also shown that theexhaust conduit section 10 comprises an oxidation catalyst, but this is optional as mentioned above. - As before, when the particle filters 30 and the NOx traps 40 need to be regenerated, one of the
flow paths 32, 33 is closed for the flow of exhaust gas by valve means 32, 33 and the one of valve means 17 opens such that cold flame gas from thecold flame vaporizer 11 is directed to and flows through theexhaust conduit section 10 which has been closed for the flow of exhaust gas. Theparticle filter 30 and the NOx trap in one of theexhaust conduit sections - Later the direction of flow of exhaust gas and cold flame gas through the two exhaust conduit sections will change so that the
particle filter 30 and theNOx trap 40 in the otherexhaust conduit section 10 are also regenerated by the cold flame gas. -
FIGS. 3 b and 3 c are sections through the particle filters 30 and theNOx trap 40 respectively. As can be seen on the figure, the filters cover substantially the whole cross section as opposed to the embodiment shown inFIG. 2 a-2 c. - Again, the embodiment shown on
FIG. 3 a-3 c are provided with twoflow paths
Claims (19)
1. Exhaust gas apparatus for the cleaning of exhaust gas, the exhaust gas apparatus comprising an exhaust conduit section which is formed with at least two separate flow paths, each flow path being provided with
a particle filter for the removal of particulate matter from the exhaust gas,
an NOx trap for the removal of NOx from the exhaust gas,
wherein the exhaust gas apparatus further comprises
at least one cold flame vaporizer in which fuel is partially oxidized in preheated air by a cold flame such that 2-20% of the calorific value of the fuel is released,
whereby a cold flame gas is formed,
the cold flame vaporizer is arranged in fluid communication with each of the flow paths in the exhaust conduit section such that the cold flame gas can flow through the particle filter and the NOx trap, and
one or more valves for controlling the flow of cold flame gas from the cold flame vaporizer to each flow path in the exhaust conduit section, whereby both the particle filter and the NOx trap in at least one of the flow paths can be regenerated in a single operation.
2. Exhaust gas apparatus according to claim 1 ,
wherein the flow paths are formed by providing the exhaust conduit section as one conduit with one or more partitions such that two or more separate flow paths for the exhaust gas are formed in the exhaust conduit section.
3. Exhaust gas apparatus according to claim 1 ,
wherein the flow paths are formed by providing the exhaust conduit section with at least two separate conduits through which the exhaust gas can flow.
4. Exhaust gas apparatus according to claim 1 ,
wherein the at least one cold flame vaporizer is arranged outside the flow paths and that the cold flame vaporizer, is connected to each of the flow paths of the exhaust conduit section by fluid lines or conduits.
5. Exhaust gas apparatus according to claim 1 ,
wherein the at least one cold flame vaporizer is arranged within the exhaust conduit section.
6. Exhaust gas apparatus according to claim 1 ,
wherein the exhaust gas apparatus comprises one or more valve controlling the flow of exhaust gas through each of the flow paths of the exhaust conduit section.
7. Exhaust gas apparatus according to claim 1 ,
wherein the exhaust gas apparatus comprises a fuel supply which is arranged in fluid communication with the cold flame vaporizer.
8. Exhaust gas apparatus according claim 1 ,
wherein the exhaust gas apparatus comprises an air supply and a heat exchanger or electrical heater for preheating the air, the air supply being arranged in fluid communication with the cold flame vaporizer.
9. Exhaust gas apparatus according to claim 7 or 8 ,
wherein the exhaust gas apparatus comprises one or more valve controlling the flow of fuel and preheated air to the cold flame vaporizer.
10. Exhaust gas apparatus according to claim 1 ,
wherein, in each flow path, the NOx trap is arranged downstream of the particle filter.
11. Exhaust gas apparatus according to claim 1 ,
wherein the exhaust gas apparatus comprises an oxidation catalyst arranged downstream of the particle filter and the NOx trap.
12. Method for regenerating cleaning means for exhaust gas flowing through an exhaust conduit section of an exhaust gas conduit, the exhaust conduit section being formed with at least two flow paths for the exhaust gas, the cleaning means being provided in each of the flow paths and comprising
a particle filter for the removal of particulate matter from the exhaust gas,
an NOx trap for the removal of NOx from the exhaust gas,
wherein the method comprises the following steps:
providing a cold flame gas by partially oxidizing a fuel in preheated air in a cold flame such that 2-20% of the calorific value of the fuel is released, the released heat being used to evaporate the fuel thereby forming the cold flame gas,
letting the cold flame gas flow through the particle filter and the NOx trap in at least one of the flow paths of the exhaust conduit section, thereby, in one operation, regenerating both the particle filter and the NOx trap in said at least one flow path.
13. Method according to claim 12 ,
wherein the method further comprises the step of providing one or more valves for separately controlling the flow of cold flame gas from the cold flame vaporizer into each flow path of the exhaust gas conduit.
14. Method according to claim 12 ,
wherein the method further comprises the step of providing a fuel supply arranged in fluid communication with the cold flame vaporizer, and an air supply and a heat exchanger or electrical heater for the preheating of the air, the air supply being arranged in fluid communication with the cold flame vaporizer.
15. Method according to claim 14 ,
wherein the method further comprises the step of providing one or more valves for controlling the flow of fuel and preheated air to the cold flame vaporizer.
16. Method according to claim 12 ,
wherein the method further comprises the step of arranging, in each flow path in the exhaust conduit section, the NOx trap downstream of the respective particle filter.
17. Method according to claim 12 ,
wherein the method further comprises the step of arranging an oxidation catalyst in the exhaust conduit section downstream of the particle filter and the NOx trap.
18. Method for regeneration of a NOx trap wherein a cold flame gas is flowed through the NOx trap such that the NOx trap is regenerated.
19. Method for regeneration of a particle filter and a NOx trap in a single operation wherein a cold flame gas, which is formed by partially oxidizing a fuel in preheated air in a cold flame such that 2-20% of the calorific value of the fuel is released, the released heat being used to evaporate the fuel, thereby forming the cold flame gas, is flowed through the particle filter and the NOx trap such that the particle filter and the NOx trap are regenerated.
Priority Applications (1)
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US14/576,251 US20150101315A1 (en) | 2007-08-30 | 2014-12-19 | Exhaust gas apparatus and method for the regeneration of a nox trap and a particle filter |
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US96889907P | 2007-08-30 | 2007-08-30 | |
PCT/NO2008/000310 WO2009028958A1 (en) | 2007-08-30 | 2008-09-01 | Exhaust gas apparatus and method for the regeneration of a nox trap and a particle filter |
US67540010A | 2010-04-20 | 2010-04-20 | |
US14/576,251 US20150101315A1 (en) | 2007-08-30 | 2014-12-19 | Exhaust gas apparatus and method for the regeneration of a nox trap and a particle filter |
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US12/675,400 Continuation US20100236223A1 (en) | 2007-08-30 | 2008-09-01 | Exhaust gas apparatus and method for the regeneration of a nox trap and a particle filter |
PCT/NO2008/000310 Continuation WO2009028958A1 (en) | 2007-08-30 | 2008-09-01 | Exhaust gas apparatus and method for the regeneration of a nox trap and a particle filter |
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US20150101315A1 true US20150101315A1 (en) | 2015-04-16 |
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US12/675,399 Active 2033-03-09 US9784156B2 (en) | 2007-08-30 | 2008-09-01 | Particle filter assembly and method for cleaning a particle filter |
US12/675,400 Abandoned US20100236223A1 (en) | 2007-08-30 | 2008-09-01 | Exhaust gas apparatus and method for the regeneration of a nox trap and a particle filter |
US14/576,251 Abandoned US20150101315A1 (en) | 2007-08-30 | 2014-12-19 | Exhaust gas apparatus and method for the regeneration of a nox trap and a particle filter |
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US12/675,399 Active 2033-03-09 US9784156B2 (en) | 2007-08-30 | 2008-09-01 | Particle filter assembly and method for cleaning a particle filter |
US12/675,400 Abandoned US20100236223A1 (en) | 2007-08-30 | 2008-09-01 | Exhaust gas apparatus and method for the regeneration of a nox trap and a particle filter |
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EP (3) | EP2198133B1 (en) |
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150322833A1 (en) * | 2013-01-28 | 2015-11-12 | Alfa Laval Aalborg As | Method and cleaning apparatus for removal of SOx and NOx from exhaust gas |
US9528410B2 (en) | 2014-01-30 | 2016-12-27 | Denso Corporation | Reducing agent supplying device |
WO2017145111A3 (en) * | 2016-02-24 | 2017-10-05 | Jtsmcdp, Llc | Systems, devices, and methods for regenerating a particulate filter |
Families Citing this family (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8061120B2 (en) * | 2007-07-30 | 2011-11-22 | Herng Shinn Hwang | Catalytic EGR oxidizer for IC engines and gas turbines |
DE602008005623D1 (en) * | 2007-08-30 | 2011-04-28 | Energy Conversion Technology As | EXHAUST GAS AND METHOD FOR REGENERATING A NOX TRAP AND PARTICULATE FILTER |
GB2468159B (en) * | 2009-02-27 | 2011-11-09 | Energy Conversion Technology As | Exhaust gas cleaning apparatus and method for cleaning an exhaust gas |
GB2484045B (en) * | 2009-08-01 | 2015-09-30 | Electro Motive Diesel Inc | Exhaust gas recirculation system and apparatus for a locomotive two-stroke uniflow scavenged diesel engine |
WO2011017270A1 (en) * | 2009-08-01 | 2011-02-10 | Electro-Motive Diesel, Inc. | Control system for an exhaust gas recirculation system for a locomotive two-stroke uniflow scavenged diesel engine |
US20130199494A1 (en) * | 2012-02-06 | 2013-08-08 | Vianney Rabhi | High-pressure spark-ignition and stratification device for an internal combustion engine |
US8671917B2 (en) * | 2012-03-09 | 2014-03-18 | Ener-Core Power, Inc. | Gradual oxidation with reciprocating engine |
US10865709B2 (en) | 2012-05-23 | 2020-12-15 | Herng Shinn Hwang | Flex-fuel hydrogen reformer for IC engines and gas turbines |
CN103216316B (en) * | 2013-04-28 | 2015-04-15 | 清华大学 | Low-temperature combustion method of internal-combustion engine with fuel reformation inside cylinders and system |
JP6156108B2 (en) * | 2013-12-05 | 2017-07-05 | 株式会社デンソー | Highly active substance addition equipment |
CN103758630B (en) * | 2014-01-03 | 2016-02-24 | 清华大学 | The combustion system of natural gas engine and natural gas engine |
US10626790B2 (en) | 2016-11-16 | 2020-04-21 | Herng Shinn Hwang | Catalytic biogas combined heat and power generator |
CN110799732B (en) * | 2017-07-24 | 2021-08-31 | 沃尔沃卡车集团 | Exhaust gas aftertreatment system with adjustable flow path and method for operating such an exhaust gas aftertreatment system |
DE102018222571A1 (en) | 2018-12-20 | 2020-06-25 | Ford Global Technologies, Llc | Method for operating an exhaust gas aftertreatment device of a motor vehicle |
DE102019203061A1 (en) | 2019-03-06 | 2020-09-10 | Ford Global Technologies, Llc | Method for regenerating a NOx storage catalytic converter of an exhaust gas aftertreatment device |
DE102021104273A1 (en) | 2021-02-23 | 2022-08-25 | Friedrich Boysen GmbH & Co KG. | burner system |
Citations (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2000257419A (en) * | 1999-03-03 | 2000-09-19 | Toyota Motor Corp | Exhaust purification method and device thereof |
US20040001983A1 (en) * | 2002-06-28 | 2004-01-01 | Matos Da Silva Jader | Process for utilization of a cold-flame vaporizer in auto-thermal reforming of liquid fuel |
US20040163377A1 (en) * | 2002-06-11 | 2004-08-26 | Ke Liu | Reducing oxides of nitrogen using reformate generated from engine fuel, water and/or air |
US6793693B1 (en) * | 1998-07-29 | 2004-09-21 | Heinrich Köhne | Method for utilizing a fuel by using exothermic pre-reactions in the form of a cold flame |
US20050053534A1 (en) * | 2003-09-08 | 2005-03-10 | Ke Liu | Integrated NOx trap and particulate filter for internal combustion engines |
US20050167173A1 (en) * | 2003-11-20 | 2005-08-04 | Michael Hoetger | Vehicle with combustion engine and auxiliary power unit |
JP2005273513A (en) * | 2004-03-24 | 2005-10-06 | Toyota Central Res & Dev Lab Inc | Device for estimating timing for mixture ignition of internal combustion engine, and control device of internal combustion engine |
US20050244764A1 (en) * | 2002-07-19 | 2005-11-03 | Frank Haase | Process for combustion of a liquid hydrocarbon |
US20050274107A1 (en) * | 2004-06-14 | 2005-12-15 | Ke Liu | Reforming unvaporized, atomized hydrocarbon fuel |
US20060053780A1 (en) * | 2004-09-13 | 2006-03-16 | Hiroyuki Kikuchi | Motorcycle exhaust system |
US20060059896A1 (en) * | 2004-09-21 | 2006-03-23 | Ke Liu | Internal combustion engine exhaust treatment having a single valve directing exhaust to dual NOx traps |
US7216481B2 (en) * | 2005-09-23 | 2007-05-15 | Delphi Technologies, Inc. | Method and apparatus for regeneration of engine exhaust aftertreatment devices |
US20070261686A1 (en) * | 2004-09-20 | 2007-11-15 | Stephan Montel | Process for the Catalytic Partial Oxidation of Liquid Hydrocarbonaceous Fuel |
US20090308057A1 (en) * | 2006-06-27 | 2009-12-17 | Renault S.A.S. | Exhaust line of a diesel engine and desulfation method |
GB2468159A (en) * | 2009-02-27 | 2010-09-01 | Energy Conversion Technology A | Exhaust gas cleaning apparatus and method for cleaning an exhaust gas |
US20100236223A1 (en) * | 2007-08-30 | 2010-09-23 | Energy Conversion Technology As | Exhaust gas apparatus and method for the regeneration of a nox trap and a particle filter |
US20100251700A1 (en) * | 2009-04-02 | 2010-10-07 | Basf Catalysts Llc | HC-SCR System for Lean Burn Engines |
US8061120B2 (en) * | 2007-07-30 | 2011-11-22 | Herng Shinn Hwang | Catalytic EGR oxidizer for IC engines and gas turbines |
Family Cites Families (55)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5236212B2 (en) * | 1973-02-15 | 1977-09-14 | ||
US4067685A (en) * | 1973-04-13 | 1978-01-10 | Ellis A. Creek | Fuel introduction system |
US3946711A (en) * | 1974-04-08 | 1976-03-30 | Wigal Voorhis F | Hydrogen fired ignition system for internal combustion engines |
JPS50144816A (en) * | 1974-05-13 | 1975-11-20 | ||
US4147136A (en) * | 1974-12-06 | 1979-04-03 | Nippon Soken, Inc. | Fuel reforming system for an internal combustion engine |
US4276131A (en) * | 1975-02-27 | 1981-06-30 | Feuerman Arnold I | Vaporized fuel for internal combustion engine |
JPS51123422A (en) * | 1975-04-21 | 1976-10-28 | Nissan Motor Co Ltd | Fuel modulating system |
US4267976A (en) * | 1978-03-10 | 1981-05-19 | Chatwin Francis R | Apparatus for vaporizing and atomizing liquids |
US4335698A (en) * | 1979-11-13 | 1982-06-22 | Max-Mi Corporation | Vaporization chamber |
US4594969A (en) * | 1981-09-29 | 1986-06-17 | Aleksander Przybylski | Method and apparatus for producing a fuel mixture |
CA1226183A (en) * | 1982-10-30 | 1987-09-01 | Timothy J. Bedford | Fuel oil injection engine |
JPS59101522A (en) * | 1982-12-02 | 1984-06-12 | Yanmar Diesel Engine Co Ltd | Exhaust gas treating device for diesel engine |
US4742801A (en) * | 1987-08-13 | 1988-05-10 | Erik Kelgard | Dual fuel mobil engine system |
US5231962A (en) * | 1991-09-27 | 1993-08-03 | Nippondenso Co., Ltd. | Fuel injection control system with split fuel injection for diesel engine |
US5408973A (en) * | 1993-11-26 | 1995-04-25 | Spangjer; Keith G. | Internal combustion engine fuel supply system and method |
JPH07189848A (en) | 1993-12-28 | 1995-07-28 | Goto Ikueikai | Combustion method for internal combustion engine |
DE59503286D1 (en) * | 1994-08-10 | 1998-09-24 | Siemens Ag | METHOD FOR CATALYTICALLY CONVERTING NITROGEN OXIDS CONTAINED IN THE EXHAUST GAS FROM A COMBUSTION ENGINE |
JPH0882257A (en) | 1994-09-14 | 1996-03-26 | Ngk Insulators Ltd | Exhaust gas recirculating device for internal combustion engine |
KR100479485B1 (en) * | 1995-08-04 | 2005-09-07 | 마이크로코팅 테크놀로지, 인크. | Chemical Deposition and Powder Formation Using Thermal Spraying of Near Supercritical and Supercritical Fluids |
DE19536571C2 (en) * | 1995-09-29 | 1998-09-03 | Siemens Ag | Method and device for metering the input of a reducing agent into the exhaust gas or exhaust air stream of an incineration plant |
WO1998004817A1 (en) * | 1996-07-26 | 1998-02-05 | Ford Motor Company Limited | Internal combustion engine |
JP3645704B2 (en) * | 1997-03-04 | 2005-05-11 | トヨタ自動車株式会社 | Exhaust gas purification device for internal combustion engine |
JPH10299456A (en) * | 1997-04-22 | 1998-11-10 | Mitsubishi Heavy Ind Ltd | Method and device for removing black smoke |
JPH10306718A (en) * | 1997-05-06 | 1998-11-17 | Mitsubishi Heavy Ind Ltd | Internal combustion engine equipped with filter regeneration apparatus |
US5992397A (en) * | 1997-06-30 | 1999-11-30 | Hideaki; Watase | Combustion enhancing apparatus and method |
DE19928102B4 (en) * | 1999-06-19 | 2005-06-02 | Daimlerchrysler Ag | Vehicle with a drive internal combustion engine and with a fuel cell system for supplying electrical consumers of the vehicle and method for operating such a vehicle |
JP3858958B2 (en) | 1999-10-22 | 2006-12-20 | 日産自動車株式会社 | Diesel engine control device |
US6237576B1 (en) * | 2000-01-25 | 2001-05-29 | Giuseppe Buccino | On demand/multi-fuel/vapor delivery system |
US6598584B2 (en) * | 2001-02-23 | 2003-07-29 | Clean Air Partners, Inc. | Gas-fueled, compression ignition engine with maximized pilot ignition intensity |
US6378489B1 (en) * | 2001-05-24 | 2002-04-30 | Rudolf H. Stanglmaier | Method for controlling compression ignition combustion |
US6470849B1 (en) * | 2001-06-26 | 2002-10-29 | Caterpillar Inc. | Separate injector main timing maps for use with and without pilot |
US6817347B2 (en) * | 2001-09-18 | 2004-11-16 | Paul Noble | Fuel converter |
SE520972C2 (en) * | 2001-12-06 | 2003-09-16 | Stt Emtec Ab | Device for cleaning its exhaust gases in an internal combustion engine |
DE10240234A1 (en) | 2002-08-28 | 2004-03-11 | Heyder, Michael | Internal combustion engine has cold flame reactor for pre-treatment of fuel-air mixture |
US6832473B2 (en) * | 2002-11-21 | 2004-12-21 | Delphi Technologies, Inc. | Method and system for regenerating NOx adsorbers and/or particulate filters |
JP2004190586A (en) | 2002-12-12 | 2004-07-08 | Hitachi Ltd | Compression ignition type internal combustion engine |
FR2850372B1 (en) * | 2003-01-23 | 2006-06-09 | Inst Francais Du Petrole | NEW PARTIAL OXIDATION REACTOR |
US8037674B2 (en) * | 2003-02-12 | 2011-10-18 | Delphi Technologies, Inc. | System and method of NOx abatement |
EP1479883A1 (en) | 2003-05-10 | 2004-11-24 | Universität Stuttgart | Method and device for exhaust gas purification |
US7017547B2 (en) * | 2003-06-09 | 2006-03-28 | Southwest Res Inst | Method and apparatus for controlling liquid-phase fuel penetration distance in a direct-fuel injected engine |
US6866016B2 (en) * | 2003-07-14 | 2005-03-15 | General Electric Company | System and method for controlling ignition in internal combustion engines |
DE10333150A1 (en) * | 2003-07-22 | 2005-02-17 | Modine Manufacturing Co., Racine | Heat exchangers for motor vehicles |
US20080028754A1 (en) * | 2003-12-23 | 2008-02-07 | Prasad Tumati | Methods and apparatus for operating an emission abatement assembly |
US7533650B2 (en) * | 2004-04-07 | 2009-05-19 | Mack Trucks, Inc. | Emission control for an internal combustion engine |
US6955042B1 (en) * | 2004-06-30 | 2005-10-18 | Hydrogensource Llc | CPO regenerated lean NOx trap with no moving parts |
US6947830B1 (en) * | 2004-08-31 | 2005-09-20 | Walt Froloff | Adaptive variable fuel internal combustion engine |
JP4333536B2 (en) * | 2004-09-14 | 2009-09-16 | 株式会社デンソー | Diesel engine control system |
DE502005007492D1 (en) * | 2004-10-01 | 2009-07-30 | Eberspaecher J Gmbh & Co | Exhaust system for an internal combustion engine and associated operating method |
JP4515217B2 (en) * | 2004-10-14 | 2010-07-28 | ヤンマー株式会社 | Exhaust gas purification device control method |
US20060277897A1 (en) * | 2005-06-08 | 2006-12-14 | Ralph Slone | NOx reduction system and method |
JP4638543B2 (en) * | 2005-09-30 | 2011-02-23 | コリア・インスティチュート・オブ・エネルギー・リサーチ | Exhaust gas heating device for internal combustion engine |
JP2007120319A (en) * | 2005-10-25 | 2007-05-17 | Toyota Motor Corp | Exhaust emission control device of internal combustion engine |
US20080155972A1 (en) * | 2006-12-28 | 2008-07-03 | James Joshua Driscoll | Exhaust treatment system |
US8333171B2 (en) * | 2009-02-06 | 2012-12-18 | Exen Holdings, Llc | Homogenizing fuel enhancement system |
JP5482716B2 (en) * | 2010-08-20 | 2014-05-07 | マツダ株式会社 | Diesel engine control device and diesel engine control method |
-
2008
- 2008-09-01 DE DE200860005623 patent/DE602008005623D1/en active Active
- 2008-09-01 EP EP20080828640 patent/EP2198133B1/en active Active
- 2008-09-01 AT AT08828640T patent/ATE502190T1/en not_active IP Right Cessation
- 2008-09-01 PL PL08828406T patent/PL2198132T3/en unknown
- 2008-09-01 JP JP2010522844A patent/JP5631211B2/en active Active
- 2008-09-01 PT PT08828197T patent/PT2201231E/en unknown
- 2008-09-01 DK DK08828640T patent/DK2198133T3/en active
- 2008-09-01 SI SI200830236T patent/SI2198132T1/en unknown
- 2008-09-01 DK DK08828197T patent/DK2201231T3/en active
- 2008-09-01 WO PCT/NO2008/000311 patent/WO2009028959A1/en active Application Filing
- 2008-09-01 EP EP20080828197 patent/EP2201231B1/en active Active
- 2008-09-01 CA CA 2696098 patent/CA2696098A1/en not_active Abandoned
- 2008-09-01 ES ES08828197T patent/ES2383876T3/en active Active
- 2008-09-01 US US12/675,401 patent/US8601984B2/en not_active Expired - Fee Related
- 2008-09-01 AT AT08828406T patent/ATE502189T1/en not_active IP Right Cessation
- 2008-09-01 JP JP2010522846A patent/JP5192045B2/en not_active Expired - Fee Related
- 2008-09-01 ES ES08828640T patent/ES2362325T3/en active Active
- 2008-09-01 US US12/675,399 patent/US9784156B2/en active Active
- 2008-09-01 PT PT08828640T patent/PT2198133E/en unknown
- 2008-09-01 EP EP20080828406 patent/EP2198132B1/en active Active
- 2008-09-01 DK DK08828406T patent/DK2198132T3/en active
- 2008-09-01 CN CN200880105172.8A patent/CN101802354B/en active Active
- 2008-09-01 DE DE200860005624 patent/DE602008005624D1/en active Active
- 2008-09-01 PL PL08828197T patent/PL2201231T3/en unknown
- 2008-09-01 CN CN2008801049022A patent/CN101802353B/en active Active
- 2008-09-01 PT PT08828406T patent/PT2198132E/en unknown
- 2008-09-01 US US12/675,400 patent/US20100236223A1/en not_active Abandoned
- 2008-09-01 PL PL08828640T patent/PL2198133T3/en unknown
- 2008-09-01 AT AT08828197T patent/ATE547602T1/en active
- 2008-09-01 CA CA 2696097 patent/CA2696097A1/en not_active Abandoned
- 2008-09-01 CA CA 2696094 patent/CA2696094A1/en not_active Abandoned
- 2008-09-01 SI SI200830237T patent/SI2198133T1/en unknown
- 2008-09-01 JP JP2010522845A patent/JP5683267B2/en active Active
- 2008-09-01 CN CN2008801050299A patent/CN101849088B/en not_active Expired - Fee Related
- 2008-09-01 WO PCT/NO2008/000310 patent/WO2009028958A1/en active Application Filing
- 2008-09-01 WO PCT/NO2008/000309 patent/WO2009028957A1/en active Application Filing
- 2008-09-01 ES ES08828406T patent/ES2362323T3/en active Active
-
2011
- 2011-05-27 CY CY20111100512T patent/CY1113226T1/en unknown
- 2011-05-27 CY CY20111100511T patent/CY1113227T1/en unknown
-
2012
- 2012-05-25 CY CY20121100471T patent/CY1113229T1/en unknown
-
2014
- 2014-12-19 US US14/576,251 patent/US20150101315A1/en not_active Abandoned
Patent Citations (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6793693B1 (en) * | 1998-07-29 | 2004-09-21 | Heinrich Köhne | Method for utilizing a fuel by using exothermic pre-reactions in the form of a cold flame |
JP2000257419A (en) * | 1999-03-03 | 2000-09-19 | Toyota Motor Corp | Exhaust purification method and device thereof |
US20040163377A1 (en) * | 2002-06-11 | 2004-08-26 | Ke Liu | Reducing oxides of nitrogen using reformate generated from engine fuel, water and/or air |
US20040001983A1 (en) * | 2002-06-28 | 2004-01-01 | Matos Da Silva Jader | Process for utilization of a cold-flame vaporizer in auto-thermal reforming of liquid fuel |
US20050244764A1 (en) * | 2002-07-19 | 2005-11-03 | Frank Haase | Process for combustion of a liquid hydrocarbon |
US20050053534A1 (en) * | 2003-09-08 | 2005-03-10 | Ke Liu | Integrated NOx trap and particulate filter for internal combustion engines |
US20050167173A1 (en) * | 2003-11-20 | 2005-08-04 | Michael Hoetger | Vehicle with combustion engine and auxiliary power unit |
JP2005273513A (en) * | 2004-03-24 | 2005-10-06 | Toyota Central Res & Dev Lab Inc | Device for estimating timing for mixture ignition of internal combustion engine, and control device of internal combustion engine |
US20050274107A1 (en) * | 2004-06-14 | 2005-12-15 | Ke Liu | Reforming unvaporized, atomized hydrocarbon fuel |
US20060053780A1 (en) * | 2004-09-13 | 2006-03-16 | Hiroyuki Kikuchi | Motorcycle exhaust system |
US20070261686A1 (en) * | 2004-09-20 | 2007-11-15 | Stephan Montel | Process for the Catalytic Partial Oxidation of Liquid Hydrocarbonaceous Fuel |
US20060059896A1 (en) * | 2004-09-21 | 2006-03-23 | Ke Liu | Internal combustion engine exhaust treatment having a single valve directing exhaust to dual NOx traps |
US7216481B2 (en) * | 2005-09-23 | 2007-05-15 | Delphi Technologies, Inc. | Method and apparatus for regeneration of engine exhaust aftertreatment devices |
US20090308057A1 (en) * | 2006-06-27 | 2009-12-17 | Renault S.A.S. | Exhaust line of a diesel engine and desulfation method |
US8061120B2 (en) * | 2007-07-30 | 2011-11-22 | Herng Shinn Hwang | Catalytic EGR oxidizer for IC engines and gas turbines |
US20100236223A1 (en) * | 2007-08-30 | 2010-09-23 | Energy Conversion Technology As | Exhaust gas apparatus and method for the regeneration of a nox trap and a particle filter |
GB2468159A (en) * | 2009-02-27 | 2010-09-01 | Energy Conversion Technology A | Exhaust gas cleaning apparatus and method for cleaning an exhaust gas |
US20120051990A1 (en) * | 2009-02-27 | 2012-03-01 | Cool Flame Technologies As | Exhaust gas cleaning apparatus and method for cleaning an exhaust gas |
US20100251700A1 (en) * | 2009-04-02 | 2010-10-07 | Basf Catalysts Llc | HC-SCR System for Lean Burn Engines |
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150322833A1 (en) * | 2013-01-28 | 2015-11-12 | Alfa Laval Aalborg As | Method and cleaning apparatus for removal of SOx and NOx from exhaust gas |
US9631533B2 (en) * | 2013-01-28 | 2017-04-25 | Alfa Laval Aalborg A/S | Method and cleaning apparatus for removal of SOx and NOx from exhaust gas |
US9528410B2 (en) | 2014-01-30 | 2016-12-27 | Denso Corporation | Reducing agent supplying device |
WO2017145111A3 (en) * | 2016-02-24 | 2017-10-05 | Jtsmcdp, Llc | Systems, devices, and methods for regenerating a particulate filter |
US10941685B2 (en) | 2016-02-24 | 2021-03-09 | Jtsmcdp, Llc | Systems, devices, and methods for regenerating a particulate filter |
US11761362B2 (en) | 2016-02-24 | 2023-09-19 | Jtsmcdp, Llc | Systems, devices, and methods for regenerating a particulate filter |
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