WO2000050744A1 - Procede de regeneration assistee de filtre a particules par apport de solution contenant des composes hydroxyles - Google Patents
Procede de regeneration assistee de filtre a particules par apport de solution contenant des composes hydroxyles Download PDFInfo
- Publication number
- WO2000050744A1 WO2000050744A1 PCT/FR2000/000319 FR0000319W WO0050744A1 WO 2000050744 A1 WO2000050744 A1 WO 2000050744A1 FR 0000319 W FR0000319 W FR 0000319W WO 0050744 A1 WO0050744 A1 WO 0050744A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- combustion
- regeneration
- particulate filter
- solution
- supply
- 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
- F01N3/023—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
- F01N3/029—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 by adding non-fuel substances to exhaust
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
- F02M25/00—Engine-pertinent apparatus for adding non-fuel substances or small quantities of secondary fuel to combustion-air, main fuel or fuel-air mixture
Definitions
- the present invention relates to the technical field of regeneration of particle filters.
- the invention relates to a method of regeneration by combustion of a particulate filter placed on the exhaust pipe of an internal combustion engine.
- Diesel engine exhaust contains solid particles which it is desirable to retain in filters, so as to reduce pollution.
- filters tend to clog up due to the accumulation of filtered particles.
- the progressive clogging of the filters causes, in the exhaust ducts, a back pressure of increasing value, which can become damaging. Therefore, a filter must be cleaned periodically before it can be used under acceptable conditions. This step is called regenerating the filter. It is obtained by total in situ oxidation of the particles, essentially consisting of solid, polycondensed and highly dehydrogenated carbon molecules, and absorbed heavy hydrocarbons.
- the first consists of passive assistance, by adding a catalytic phase to the filter or an organometallic additive in the fuel so as to lower the combustion start temperature.
- the catalytic phases are generally not stable. Indeed, the combustion of the particles fixed on the filter is an exothermic reaction which causes the aging of the catalyst.
- the catalytic phase and the additives may not allow the combustion of the particles at temperatures below 400 ° C.
- certain additives can degrade the ceramic supports of the filters, and in general, the accumulation of these additives leads to clogging of the filters.
- the second line of action consists of active assistance through the provision of energy by external heating. This can be achieved in particular by means of a burner or an electrical resistance. Such an addition generally takes place only for the start-up phase of the reaction, the latter, once initiated, self-sustaining. However, the electrical power required to heat the exhaust gases or the filter itself, results in additional installation costs and significant overconsumption.
- the present invention proposes to promote the regeneration of a particulate filter at a lower temperature.
- the method comprises an additional supply of chemical compounds, such as iron, sodium or cerium, mixed directly with the fuel.
- the method comprises the presence of a catalytic phase disposed on the particle filter.
- the method comprises an energy supply at the level of the particle filter.
- the solution used is an aqueous solution or a solution containing alcohols.
- Figure 1 shows, schematically, the intake and exhaust system of an internal combustion engine.
- FIG. 1 an internal combustion engine 1, consisting of a combustion chamber 7, connected to an intake system, which consists of an intake duct 2 and an intake manifold 3 , and to an exhaust system, which consists of an exhaust manifold 4 and an exhaust duct 5.
- an intake system which consists of an intake duct 2 and an intake manifold 3
- an exhaust system which consists of an exhaust manifold 4 and an exhaust duct 5.
- a filter 6 which is crossed by the gases d exhaust from combustion.
- the supply of solution takes place before the combustion of the fuel mixture has taken place.
- the supply can be made, for example, by a direct injection into the fuel or by a direct injection into the intake air, into the exhaust gas recirculation duct, or into the cylinder.
- the addition can also be made by a fuel previously additivated (of the aquazole type, for example) for which different methods of stabilizing the fuel / solution emulsion already exist.
- Injection systems of aqueous solution upstream of the engine 1 are already used since the presence of water in the fuel, during the combustion, reduces the production of nitrogen oxides and soot. For these systems, water injection takes place during the entire operation of engine 1.
- a second embodiment consists in injecting the solution, containing compounds having at least one hydroxyl function, downstream of the combustion chamber 7 and upstream of the filter 6.
- the solution is therefore injected directly into the exhaust gases.
- a first system for injecting the solution into the fuel, placed upstream of the combustion chamber can participate in the regeneration of the filter, but also reduce, for example if the solution used is water, the production of nitrogen oxides and soot during combustion.
- a second injection system located downstream of the combustion chamber can be exclusively dedicated to promoting the regeneration of the filter.
- the filter contains a catalytic phase, or if the fuel includes additives of the Iron, Sodium, Cerium, Copper, Manganese type, the supply of solution in the exhaust gases allows regeneration of the filter in the urban cycle and extra urban, even for relatively low exhaust gas temperatures.
- an external supply of energy by heating the filter for example of the electric heating, burner or microwave type, is very low, or even useless. It is then possible to use an exhaust gas heating system or filter that consumes little energy, and even to completely eliminate such a system.
- the solution used can be, for example, simply water, but can also be a solution of alcohols, or else a mixture of these two compounds.
- An example of an aqueous solution used in the present invention is that of glycol water.
- the present invention promotes the regeneration of a particulate filter by lowering the temperature of ignition of the particles and of propagation throughout the soot bed, and allows more frequent regenerations of the filter.
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Processes For Solid Components From Exhaust (AREA)
- Filtering Of Dispersed Particles In Gases (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00903773A EP1165945A1 (fr) | 1999-02-24 | 2000-02-10 | Procede de regeneration assistee de filtre a particules par apport de solution contenant des composes hydroxyles |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR99/02286 | 1999-02-24 | ||
FR9902286A FR2789910B1 (fr) | 1999-02-24 | 1999-02-24 | Procede de regeneration assistee de filtre a particules par apport de solution contenant des composes hydroxyles |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2000050744A1 true WO2000050744A1 (fr) | 2000-08-31 |
Family
ID=9542465
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR2000/000319 WO2000050744A1 (fr) | 1999-02-24 | 2000-02-10 | Procede de regeneration assistee de filtre a particules par apport de solution contenant des composes hydroxyles |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1165945A1 (fr) |
FR (1) | FR2789910B1 (fr) |
WO (1) | WO2000050744A1 (fr) |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57162629A (en) * | 1981-03-30 | 1982-10-06 | Tsuchiya Mfg Co Ltd | Treatment of fine particle in waste gas |
JPS60153413A (ja) * | 1984-01-20 | 1985-08-12 | Toyota Motor Corp | デイ−ゼル排気浄化装置 |
JPS6293420A (ja) * | 1985-10-18 | 1987-04-28 | Mazda Motor Corp | 触媒溶液 |
US4670233A (en) * | 1984-10-04 | 1987-06-02 | Filterwerk Mann & Hummel Gmbh | Method of removing soot which has been trapped in an exhaust gas filter of an internal combustion engine |
EP0492101A1 (fr) * | 1990-12-21 | 1992-07-01 | Daimler-Benz Aktiengesellschaft | Utilisation d'additifs organométalliques pour améliorer la combustion de la suie d'huiles pour Diesel |
EP0590814A2 (fr) * | 1992-09-28 | 1994-04-06 | Ford Motor Company Limited | Système de contrôle d'émission de particules et de gaz d'échappement |
-
1999
- 1999-02-24 FR FR9902286A patent/FR2789910B1/fr not_active Expired - Fee Related
-
2000
- 2000-02-10 WO PCT/FR2000/000319 patent/WO2000050744A1/fr not_active Application Discontinuation
- 2000-02-10 EP EP00903773A patent/EP1165945A1/fr not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS57162629A (en) * | 1981-03-30 | 1982-10-06 | Tsuchiya Mfg Co Ltd | Treatment of fine particle in waste gas |
JPS60153413A (ja) * | 1984-01-20 | 1985-08-12 | Toyota Motor Corp | デイ−ゼル排気浄化装置 |
US4670233A (en) * | 1984-10-04 | 1987-06-02 | Filterwerk Mann & Hummel Gmbh | Method of removing soot which has been trapped in an exhaust gas filter of an internal combustion engine |
JPS6293420A (ja) * | 1985-10-18 | 1987-04-28 | Mazda Motor Corp | 触媒溶液 |
EP0492101A1 (fr) * | 1990-12-21 | 1992-07-01 | Daimler-Benz Aktiengesellschaft | Utilisation d'additifs organométalliques pour améliorer la combustion de la suie d'huiles pour Diesel |
EP0590814A2 (fr) * | 1992-09-28 | 1994-04-06 | Ford Motor Company Limited | Système de contrôle d'émission de particules et de gaz d'échappement |
Non-Patent Citations (3)
Title |
---|
PATENT ABSTRACTS OF JAPAN vol. 11, no. 302 2 October 1987 (1987-10-02) * |
PATENT ABSTRACTS OF JAPAN vol. 7, no. 3 7 January 1983 (1983-01-07) * |
PATENT ABSTRACTS OF JAPAN vol. 9, no. 319 14 December 1985 (1985-12-14) * |
Also Published As
Publication number | Publication date |
---|---|
EP1165945A1 (fr) | 2002-01-02 |
FR2789910B1 (fr) | 2004-07-09 |
FR2789910A1 (fr) | 2000-08-25 |
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