JP2001503668A - NO▲下x▼吸収体 - Google Patents
NO▲下x▼吸収体Info
- Publication number
- JP2001503668A JP2001503668A JP51033998A JP51033998A JP2001503668A JP 2001503668 A JP2001503668 A JP 2001503668A JP 51033998 A JP51033998 A JP 51033998A JP 51033998 A JP51033998 A JP 51033998A JP 2001503668 A JP2001503668 A JP 2001503668A
- Authority
- JP
- Japan
- Prior art keywords
- sorbent
- absorber
- exhaust stream
- support
- temperature
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
Links
Classifications
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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
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/22—Control of additional air supply only, e.g. using by-passes or variable air pump drives
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/0407—Constructional details of adsorbing systems
- B01D53/0415—Beds in cartridges
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/54—Nitrogen compounds
- B01D53/56—Nitrogen oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
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- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9481—Catalyst preceded by an adsorption device without catalytic function for temporary storage of contaminants, e.g. during cold start
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
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- B01D53/34—Chemical or biological purification of waste gases
- B01D53/92—Chemical or biological purification of waste gases of engine exhaust gases
- B01D53/94—Chemical or biological purification of waste gases of engine exhaust gases by catalytic processes
- B01D53/9481—Catalyst preceded by an adsorption device without catalytic function for temporary storage of contaminants, e.g. during cold start
- B01D53/949—Catalyst preceded by an adsorption device without catalytic function for temporary storage of contaminants, e.g. during cold start for storing sulfur oxides
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
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- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/009—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00 having two or more separate purifying devices arranged in series
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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
- F01N3/0814—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents combined with catalytic converters, e.g. NOx absorption/storage reduction catalysts
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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
- F01N3/0807—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
- F01N3/085—Sulfur or sulfur 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
- F01N3/0807—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by using absorbents or adsorbents
- F01N3/0871—Regulation of absorbents or adsorbents, e.g. purging
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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
- F01N3/0871—Regulation of absorbents or adsorbents, e.g. purging
- F01N3/0885—Regeneration of deteriorated absorbents or adsorbents, e.g. desulfurization of NOx traps
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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
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/22—Control of additional air supply only, e.g. using by-passes or variable air pump drives
- F01N3/222—Control of additional air supply only, e.g. using by-passes or variable air pump drives using electric valves only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/30—Alkali metal compounds
- B01D2251/304—Alkali metal compounds of sodium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/40—Alkaline earth metal or magnesium compounds
- B01D2251/408—Alkaline earth metal or magnesium compounds of barium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/60—Inorganic bases or salts
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/25—Coated, impregnated or composite adsorbents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2253/00—Adsorbents used in seperation treatment of gases and vapours
- B01D2253/30—Physical properties of adsorbents
- B01D2253/34—Specific shapes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/30—Sulfur compounds
- B01D2257/302—Sulfur oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2257/00—Components to be removed
- B01D2257/40—Nitrogen compounds
- B01D2257/404—Nitrogen oxides other than dinitrogen oxide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/01—Engine exhaust gases
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40007—Controlling pressure or temperature swing adsorption
- B01D2259/40009—Controlling pressure or temperature swing adsorption using sensors or gas analysers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/40—Further details for adsorption processes and devices
- B01D2259/40083—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption
- B01D2259/40088—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating
- B01D2259/40096—Regeneration of adsorbents in processes other than pressure or temperature swing adsorption by heating by using electrical resistance heating
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/45—Gas separation or purification devices adapted for specific applications
- B01D2259/4566—Gas separation or purification devices adapted for specific applications for use in transportation means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/02—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography
- B01D53/04—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by adsorption, e.g. preparative gas chromatography with stationary adsorbents
- B01D53/0454—Controlling adsorption
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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
- F01N2240/16—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 an electric heater, i.e. a resistance heater
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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
- F01N2250/12—Combinations of different methods of purification absorption or adsorption, 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
- F01N2610/00—Adding substances to exhaust gases
- F01N2610/03—Adding substances to exhaust gases the substance being hydrocarbons, e.g. engine fuel
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B1/00—Engines characterised by fuel-air mixture compression
- F02B1/02—Engines characterised by fuel-air mixture compression with positive ignition
- F02B1/04—Engines characterised by fuel-air mixture compression with positive ignition with fuel-air mixture admission into cylinder
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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
Abstract
Description
Claims (1)
- 【特許請求の範囲】 1.支持体を具備し、この支持体上に、周りをガス流が流れる、増大した表面積 をする吸収層が被覆形成され、この吸収層が、少なくとも1つの窒素酸化物( NOx)およびまたは少なくとも1つの硫黄酸化物(SOx)を可逆的に吸収す るために適している、吸収体において、支持体が吸収層を備えた範囲において 0.16mm以下の壁厚を有することを特徴とする吸収体。 2.支持体を具備し、この支持体上に、周りをガス流が流れる、増大した表面積 を有する吸収層が被覆形成され、この吸収層が、少なくとも1つの窒素酸化物 (NOx)およびまたは少なくとも1つの硫黄酸化物(SOx)を可逆的に吸収 するために適している、支持体を備えた吸収体において、支持体が金属からな っていることを特徴とする吸収体。 3.金属が金属薄板または金属箔であることを特徴とする請求項2記載の吸収体 。 4.金属からなる支持体が電流を供給することによって加熱可能であることを特 徴とする請求項2または3記載の吸収体。 5.金属からなる支持体が0.1mm以下、特に0.05mm以下の壁厚を有すること を特徴とする請求項2〜4のいずれか一つに記載の吸収体。 6.支持体が閉じた横断面を有する平行に延びる多数の通路を備え、この通路が 内部に吸収層を備え、この通路にガス流を案内可能であることを特徴とする請 求項1〜5のいずれか一つに記載の吸収体。 7.複数の通路が少なくとも一部区間にわたってガス流に乱流を発生する構造体 を備えていることを特徴とする請求項6記載の吸収体。 8.ガス流に乱流を発生する構造体が通路の横断面変更部およびまたは波形部お よびまたはねじれ部または湾曲部であることを特徴とする請求項7記載の吸収 体。 9.吸収体がセグメントに分割されていることを特徴とする請求項6〜8のいず れか一つに記載の吸収体。 10.セグメントが異なる長さおよびまたは異なる通路横断面およびまたは異なる 数の通路を有し、およびまたは少なくとも50cmだけ互いに離隔されている ことを特徴とする請求項9記載の吸収体。 11.ガス流が到達し得る吸収層の質量に関連して、増大した表面積が少なくとも 20m2/g、特に少なくとも40m2/g、好ましくは少なくとも100m2 /gを有することを特徴とする請求項1〜10のいずれか一つに記載の吸収体 。 12.吸収層が酸化アルミニウム、特にγ−酸化アルミニウムを含んでいることを 特徴とする請求項1〜11のいずれか一つに記載の吸収体。 13.吸収層がアルカリ金属、アルカリ土類金属、希土類、ランタン、チタン、銅 およびまたはマンガンを含んでいることを特徴とする請求項1〜12のいずれ か一つに記載の吸収体。 14.吸収層がバリウム、ナトリウム、カリウムの元素の少なくとも一つを含んで いることを特徴とする請求項13記載の吸収体。 15.吸収層が特に酸素過剰時に、特に内燃機関の排気からNOxおよびまたはS Oxを吸収することを特徴とする請求項1〜14のいずれか一つに記載の吸収 体。 16.吸収層が還元された雰囲気内でおよびまたは低い酸素濃度でNOxおよびま たはSOxを遊離することを特徴とする請求項1〜15のいずれか一つに記載 の吸収体。 17.酸素濃度または酸素濃度を含む量を検出する酸素濃度測定装置と、制御装置 が設けられ、この制御装置が酸素濃度またはこの酸素濃度を含む量を入力量と して有し、吸収体の負荷または負荷解除を開始することを特徴とする請求項1 5およびまたは16記載の吸収体。 18.吸収層が高い温度でNOxおよびまたはSOxを遊離することを特徴とする請 求項1〜17のいずれか一つに記載の吸収体。 19.ガス流およびまたは吸収層およびまたは支持体の温度または温度を含む量を 検出する温度測定装置が設けられ、更に制御装置が設けられ、この制御装置が 温度または温度を含む量を入力量として有し、吸収体の負荷または負荷解除を 開始することを特徴とする請求項18記載の吸収体。 20.制御装置が入力量として、酸素濃度と温度またはこれらを含む量を有するこ とを特徴とする請求項17および19記載の吸収体。 21.吸収層がセラミックス内に少なくとも50μmの厚さを有し、金属支持体上 に少なくとも25μmの厚さを有することを特徴とする請求項1〜20のいず れか一つに記載の吸収体。 22.吸収層が薄め塗膜内にあることを特徴とする請求項1〜21のいずれか一つ に記載の吸収体。 23.吸収層が少なくとも一つの貴金属を支持していることを特徴とする請求項1 〜22のいずれか一つに記載の吸収体。 24.吸収層が貴金属と共に酸化触媒または三元触媒を形成していることを特徴と する請求項23記載の吸収体。 25.ガス流が流れ得る質量に関連して、吸収層が少なくとも0.2cm3/gの孔容 積を有することを特徴とする請求項1〜24のいずれか一つに記載の吸収体。 26.独立したユニットとしての酸化触媒、特に三元触媒が吸収体の前およびまた は後に接続配置されていることを特徴とする請求項1〜25のいずれか一つに 記載の吸収体。 27.内燃機関の排気流から少なくとも窒素酸化物(NOx)を除去するための方 法において、次のステップ、 酸素を含む排気流を生じながら内燃機関を運転し、 NOx用の収着剤を有する装置を経て酸素を含む排気流を案内し、この場合 収着剤が160μm以下の壁厚の支持体上の装置内におよびまたは金属製の支 持体上に配置され、 収着剤と共にNOxを貯蔵し、 酸素の少ない排気流または化学量論的な還元剤過剰量を有する排気流を生じ る前に、同時にあるいはその後に、内燃機関の運転中収着剤を少なくとも所定 の温度に加熱し、 収着剤が少なくとも所定の温度を有する間、酸素の少ない排気流または化学 量論的な還元剤過剰量を有する排気流内でNOxを還元しながら収着剤からN Oxを放出し、 酸素含む排気流を再ひ生じ、 酸素含む排気流を再び生じる上記ステップの前、同時にあるいはその後で、 所定の温度への収着剤の加熱を終了し、 収着剤と共にNOxを貯蔵する上記ステップ以降のステップを繰り返す ことを特徴とする方法。 28.収着剤の加熱が排気流への燃料噴射と特に排気流の触媒的な燃焼およびまた は内燃機関の運転状態の変更およびまたは収着剤の電気的な加熱およびまたは 排気流のバーナー加熱によって行われることを特徴とする請求項27記載の方 法。 29.内燃機関の運転中収着剤を所定の温度に予熱するステップの前に、収着剤お よびまたは収着剤と温度か関連する物が少なくとも所定の温度を有するかどう かを検出するステップが実施され、 収着剤およびまたは収着剤と温度が関連する物が少なくとも所定の温度を有 することが検出時に確認されると、内燃機関の運転中収着剤を所定の温度に予 熱するステップと、内燃機関の運転中少なくとも所定の温度への収着剤の加熱 を終了するステップが省略されることを特徴とする請求項27または28記載 の方法。 30.内燃機関の排気流から少なくとも窒素酸化物(NOx)を除去するための方 法において、次のステップ、 酸素を含む排気流を生じながら内燃機関を運転し、 NOx用の収着剤を有する装置を経て酸素を含む排気流を案内し、この場合 収着剤が160μm以下の壁厚の支持体上の装置内におよびまたは金属製の支 持体上に配置され、 収着剤と共にNOxを貯蔵し、 収着剤およびまたは収着剤と温度的に関連する物が少なくとも所定の温度を 有するかどうかを検出し、 収着剤が少なくとも所定の温度を有する間、酸素の少ない排気流または化学 量論的な還元剤過剰量を有する排気流を生じ、 収着剤が少なくとも所定の温度を有する間、酸素の少ない排気流または化学 量論的な還元剤過剰量を有する排気流内でNOxを還元しながら収着剤からN Oxを放出し、 酸素含む排気流を再び生じ、 収着剤と共にNOxを貯蔵する上記ステップ以降のステップを繰り返す ことを特徴とする方法。 31.方法ステップの間、NOxのほかに、少なくとも一つの硫黄酸化物(SOx) が収着剤によって貯蔵されるかまたは収着剤から放出されることを特徴とする 請求項27〜30のいずれか一つに記載の方法。 32.収着剤からの放出が時間に依存しておよびまたは負荷に依存して行われるこ とを特徴とする請求項27〜31のいずれか一つに記載の方法。 33.収着剤として吸収剤が使用されることを特徴とする請求項27〜32のいず れか一つに記載の方法。 34.吸収剤がγ−酸化アルミニウムと、アルカリ金属、アルカリ土類金属、希土 類およびまたはランタンのグループの少なくとも一つの元素を含んでいること を特徴とする請求項33記載の方法。 35.排気流が乱流状態で収着剤を経て案内されることを特徴とする請求項27〜 34のいずれか一つに記載の方法。 36.排気流が平行に延びる多数の通路を有する、収着剤を支持する支持体を経て 案内されることを特徴とする請求項27〜35のいずれか一つに記載の方法。 37.排気流が、異なる数の通路およびまたは異なる直径の通路を有する、収着剤 を支持する1個または複数の支持体を経て、およびまたは少なくとも50cm だけ互いに離隔された、収着剤を支持する支持体を経て案内されることを特徴 とする請求項36記載の方法。 38.排気流が、ねじれたまたは湾曲した通路を有する、収着剤を支持する支持体 を経て案内されることを特徴とする請求項36または37記載の方法。
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DE19633050.5 | 1996-08-19 | ||
DE19633050 | 1996-08-19 | ||
PCT/EP1997/004306 WO1998007504A1 (de) | 1996-08-19 | 1997-08-07 | NOx-ABSORBER |
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JP2001503668A true JP2001503668A (ja) | 2001-03-21 |
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US (2) | US6531099B1 (ja) |
EP (1) | EP0944428B1 (ja) |
JP (1) | JP2001503668A (ja) |
KR (1) | KR100494189B1 (ja) |
WO (1) | WO1998007504A1 (ja) |
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1997
- 1997-08-07 WO PCT/EP1997/004306 patent/WO1998007504A1/de active IP Right Grant
- 1997-08-07 KR KR10-1999-7000653A patent/KR100494189B1/ko not_active IP Right Cessation
- 1997-08-07 EP EP97918968.5A patent/EP0944428B1/de not_active Expired - Lifetime
- 1997-08-07 JP JP51033998A patent/JP2001503668A/ja not_active Ceased
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1999
- 1999-02-18 US US09/252,506 patent/US6531099B1/en not_active Expired - Lifetime
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JP2003003828A (ja) * | 2001-06-22 | 2003-01-08 | Bosch Automotive Systems Corp | ディーゼル排気ガス後処理方法及び装置 |
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KR100494189B1 (ko) | 2005-06-10 |
EP0944428B1 (de) | 2013-06-26 |
WO1998007504A1 (de) | 1998-02-26 |
KR20000068020A (ko) | 2000-11-25 |
US6274106B1 (en) | 2001-08-14 |
US6531099B1 (en) | 2003-03-11 |
EP0944428A1 (de) | 1999-09-29 |
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