DE102006011411B3 - catalyst - Google Patents
catalyst Download PDFInfo
- Publication number
- DE102006011411B3 DE102006011411B3 DE102006011411A DE102006011411A DE102006011411B3 DE 102006011411 B3 DE102006011411 B3 DE 102006011411B3 DE 102006011411 A DE102006011411 A DE 102006011411A DE 102006011411 A DE102006011411 A DE 102006011411A DE 102006011411 B3 DE102006011411 B3 DE 102006011411B3
- Authority
- DE
- Germany
- Prior art keywords
- catalyst
- reduction
- oxidation
- reduction catalyst
- oxidation catalyst
- 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.)
- Revoked
Links
- 239000003054 catalyst Substances 0.000 title claims abstract description 164
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims abstract description 70
- 230000003647 oxidation Effects 0.000 claims abstract description 55
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 55
- 238000006722 reduction reaction Methods 0.000 claims abstract description 54
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 26
- 239000007789 gas Substances 0.000 claims abstract description 21
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 11
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 11
- 239000001301 oxygen Substances 0.000 claims abstract description 11
- 238000002485 combustion reaction Methods 0.000 claims abstract description 10
- 238000010531 catalytic reduction reaction Methods 0.000 claims abstract description 5
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 21
- 239000011149 active material Substances 0.000 claims description 12
- 239000004408 titanium dioxide Substances 0.000 claims description 10
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 8
- 239000011248 coating agent Substances 0.000 claims description 7
- 238000000576 coating method Methods 0.000 claims description 7
- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 claims description 6
- 239000000654 additive Substances 0.000 claims description 6
- 238000005470 impregnation Methods 0.000 claims description 4
- 229910052697 platinum Inorganic materials 0.000 claims description 4
- ZNOKGRXACCSDPY-UHFFFAOYSA-N tungsten trioxide Chemical compound O=[W](=O)=O ZNOKGRXACCSDPY-UHFFFAOYSA-N 0.000 claims description 4
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims description 3
- 229910052750 molybdenum Inorganic materials 0.000 claims description 3
- 239000011733 molybdenum Substances 0.000 claims description 3
- 229910052763 palladium Inorganic materials 0.000 claims description 3
- 229910052720 vanadium Inorganic materials 0.000 claims description 3
- 229910052878 cordierite Inorganic materials 0.000 claims description 2
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 claims description 2
- 238000000746 purification Methods 0.000 claims description 2
- 239000010948 rhodium Substances 0.000 claims description 2
- 229910052703 rhodium Inorganic materials 0.000 claims description 2
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 claims description 2
- LEONUFNNVUYDNQ-UHFFFAOYSA-N vanadium atom Chemical compound [V] LEONUFNNVUYDNQ-UHFFFAOYSA-N 0.000 claims 1
- 238000007086 side reaction Methods 0.000 abstract description 7
- 238000006243 chemical reaction Methods 0.000 abstract description 4
- 238000004140 cleaning Methods 0.000 abstract description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 32
- 229910021529 ammonia Inorganic materials 0.000 description 16
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 9
- GQPLMRYTRLFLPF-UHFFFAOYSA-N Nitrous Oxide Chemical compound [O-][N+]#N GQPLMRYTRLFLPF-UHFFFAOYSA-N 0.000 description 9
- 239000000919 ceramic Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 description 5
- 239000004202 carbamide Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 4
- 239000012876 carrier material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000000243 solution Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- 238000007792 addition Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- GNTDGMZSJNCJKK-UHFFFAOYSA-N divanadium pentaoxide Chemical compound O=[V](=O)O[V](=O)=O GNTDGMZSJNCJKK-UHFFFAOYSA-N 0.000 description 2
- JKQOBWVOAYFWKG-UHFFFAOYSA-N molybdenum trioxide Chemical compound O=[Mo](=O)=O JKQOBWVOAYFWKG-UHFFFAOYSA-N 0.000 description 2
- 229910052757 nitrogen Inorganic materials 0.000 description 2
- 239000001272 nitrous oxide Substances 0.000 description 2
- 239000010970 precious metal Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- GPPXJZIENCGNKB-UHFFFAOYSA-N vanadium Chemical compound [V]#[V] GPPXJZIENCGNKB-UHFFFAOYSA-N 0.000 description 2
- 229940045605 vanadium Drugs 0.000 description 2
- PAWQVTBBRAZDMG-UHFFFAOYSA-N 2-(3-bromo-2-fluorophenyl)acetic acid Chemical compound OC(=O)CC1=CC=CC(Br)=C1F PAWQVTBBRAZDMG-UHFFFAOYSA-N 0.000 description 1
- 229910021536 Zeolite Inorganic materials 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- SNAAJJQQZSMGQD-UHFFFAOYSA-N aluminum magnesium Chemical compound [Mg].[Al] SNAAJJQQZSMGQD-UHFFFAOYSA-N 0.000 description 1
- 239000007864 aqueous solution Substances 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 description 1
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000003795 desorption Methods 0.000 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 230000007062 hydrolysis Effects 0.000 description 1
- 238000006460 hydrolysis reaction Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 150000002828 nitro derivatives Chemical class 0.000 description 1
- 230000001590 oxidative effect Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- PIBWKRNGBLPSSY-UHFFFAOYSA-L palladium(II) chloride Chemical compound Cl[Pd]Cl PIBWKRNGBLPSSY-UHFFFAOYSA-L 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000012713 reactive precursor Substances 0.000 description 1
- SONJTKJMTWTJCT-UHFFFAOYSA-K rhodium(iii) chloride Chemical compound [Cl-].[Cl-].[Cl-].[Rh+3] SONJTKJMTWTJCT-UHFFFAOYSA-K 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 description 1
- 229910052721 tungsten Inorganic materials 0.000 description 1
- 239000010937 tungsten Substances 0.000 description 1
- 150000003658 tungsten compounds Chemical class 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
- 239000010457 zeolite Substances 0.000 description 1
Classifications
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- B01J35/19—
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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
- B01D53/9404—Removing only nitrogen compounds
- B01D53/9409—Nitrogen oxides
- B01D53/9431—Processes characterised by a specific device
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/56—Platinum group metals
- B01J23/64—Platinum group metals with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/648—Vanadium, niobium or tantalum or polonium
- B01J23/6482—Vanadium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/38—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals
- B01J23/54—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals combined with metals, oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/56—Platinum group metals
- B01J23/64—Platinum group metals with arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/652—Chromium, molybdenum or tungsten
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/024—Multiple impregnation or coating
- B01J37/0242—Coating followed by impregnation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J37/00—Processes, in general, for preparing catalysts; Processes, in general, for activation of catalysts
- B01J37/02—Impregnation, coating or precipitation
- B01J37/024—Multiple impregnation or coating
- B01J37/0244—Coatings comprising several layers
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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
- 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
- F01N13/0097—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 the purifying devices are arranged in a single housing
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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
- F01N3/105—General auxiliary catalysts, e.g. upstream or downstream of the main catalyst
- F01N3/106—Auxiliary oxidation 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
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/18—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control
- F01N3/20—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by methods of operation; Control specially adapted for catalytic conversion ; Methods of operation or control of catalytic converters
- F01N3/2066—Selective catalytic reduction [SCR]
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2251/00—Reactants
- B01D2251/20—Reductants
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20707—Titanium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20723—Vanadium
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20769—Molybdenum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/207—Transition metals
- B01D2255/20776—Tungsten
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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
- F01N2340/00—Dimensional characteristics of the exhaust system, e.g. length, diameter or volume of the apparatus; Spatial arrangements of exhaust apparatuses
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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
- F01N2370/00—Selection of materials for exhaust purification
- F01N2370/02—Selection of materials for exhaust purification used in catalytic reactors
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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
- F01N2510/00—Surface coverings
- F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
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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
- F01N2510/00—Surface coverings
- F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
- F01N2510/068—Surface coverings for exhaust purification, e.g. catalytic reaction characterised by the distribution of the catalytic coatings
- F01N2510/0682—Surface coverings for exhaust purification, e.g. catalytic reaction characterised by the distribution of the catalytic coatings having a discontinuous, uneven or partially overlapping coating of catalytic material, e.g. higher amount of material upstream than downstream or vice versa
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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
- F01N2510/00—Surface coverings
- F01N2510/06—Surface coverings for exhaust purification, e.g. catalytic reaction
- F01N2510/068—Surface coverings for exhaust purification, e.g. catalytic reaction characterised by the distribution of the catalytic coatings
- F01N2510/0684—Surface coverings for exhaust purification, e.g. catalytic reaction characterised by the distribution of the catalytic coatings having more than one coating layer, e.g. multi-layered coatings
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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
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
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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
Es wird ein Katalysator (1) zur Reinigung von sauerstoffhaltigen Abgasen (5) einer Verbrennungsanlage, insbesondere eines mit Luftüberschuss betriebenen Verbrennungsmotors umfassend einen Reduktionskatalysator (2) zur selektiven katalytischen Reduktion von im Abgas (5) enthaltenen Stickoxiden mittels eines Reduktionsmittels und einem dem Reduktionskatalysator (2) abströmseitig aufgebrachten Oxidationskatalysator (3) zur Oxidation des Reduktionsmittels, angegeben. Dabei ist vorgesehen, dass der Oxidationskatalysator (3) dem Reduktionskatalysator (2) über einen abströmseitigen Bereich aufgebracht ist, der 1-19% des gesamten Katalysatorvolumens beträgt. Dabei setzt sich der Reduktionskatalysator (2) aus einer Anzahl von Einzelkatalysatoren (15, 16) zusammen, wobei der Oxidationskatalysator (3) auf dem oder den abströmseitig letzten Einzelkatalysator/-en aufgebracht ist. Mit dem Katalysator (1) wird bei vielfältigem Einsatz ein hoher Umsetzungsgrad von Stickoxiden unter Vermeidung eines Reduktionsmittelschlupfes und unerwünschter Nebenreaktionen erzielt.The invention relates to a catalyst (1) for cleaning oxygen-containing exhaust gases (5) from a combustion system, in particular an internal combustion engine operated with excess air, comprising a reduction catalyst (2) for the selective catalytic reduction of nitrogen oxides contained in the exhaust gas (5) by means of a reducing agent and one of the reduction catalyst ( 2) oxidation catalyst (3) applied on the downstream side for the oxidation of the reducing agent. It is provided that the oxidation catalyst (3) is applied to the reduction catalyst (2) over an area on the outflow side, which is 1-19% of the total catalyst volume. The reduction catalyst (2) is composed of a number of individual catalysts (15, 16), the oxidation catalyst (3) being applied to the last individual catalyst (s) on the outflow side. With a wide range of uses, the catalyst (1) achieves a high degree of conversion of nitrogen oxides while avoiding slippage of reducing agents and undesirable side reactions.
Description
Die Erfindung betrifft einen Katalysator zur Reinigung von sauerstoffhaltigen Abgasen einer Verbrennungsanlage, insbesondere eines mit Luftüberschuss betriebenen Verbrennungsmotors, umfassend einen Reduktionskatalysator zur selektiven katalytischen Reduktion von im Abgas enthaltenen Stickoxiden mittels eines Reduktionsmittels und einen dem Reduktionskatalysator abströmseitig aufgebrachten Oxidationskatalysator zur Oxidation des Reduktionsmittels, wobei der Oxidationskatalysator dem Reduktionskatalysator über einen abströmseitigen Bereich aufgebracht ist, der 1–19% des gesamten Katalysatorvoluments beträgt.The The invention relates to a catalyst for the purification of oxygen-containing Exhaust gases of a combustion plant, in particular one with excess air operated internal combustion engine comprising a reduction catalyst for the selective catalytic reduction of nitrogen oxides contained in the exhaust gas by means of a reducing agent and a reduction catalyst downstream applied oxidation catalyst for the oxidation of the reducing agent, wherein the oxidation catalyst to the reduction catalyst via a downstream Range is applied, the 1-19% of the total catalyst volume.
Ein
derartiger Katalysator ist aus der
Weiter
ist aus der
Die Abgabe des zugesetzten Reduktionsmittels an die Umwelt muss beispielsweise zur Vermeidung einer Geruchsbelästigung möglichst gering gehalten werden. Aus diesem Grund erfolgt in den angewendeten SCR-Verfahren eine bezüglich des tatsächlichen oder des zu erwartenden Stickoxidgehalts des Abgases unterstöchiometrische Dosierung des Reduktionsmittels. Hierdurch wird zwar eine Reduktionsmittelemission sicher verhindert, jedoch wird an dem Reduktionskatalysator nicht die maximal mögliche, sondern eine kleinere Menge an Stickoxiden beseitigt. Als Folge muss der Reduktionskatalysator hinreichend groß ausgelegt sein und die Steuerung der Reduktionsmitteldosierung exakt arbeiten, um insbesondere während eines transienten Motorbetriebes, wie er in einem Kraftfahrzeug üblich ist, eine signifikante Stickoxidminderung zu erreichen.The For example, to deliver the added reducing agent to the environment to avoid odor nuisance preferably be kept low. For this reason takes place in the applied SCR method a with respect to actual or the expected nitrogen oxide content of the exhaust gas substoichiometric Dosage of the reducing agent. Although this is a reductant emission certainly prevented, but is not on the reduction catalyst the maximum possible, but eliminates a smaller amount of nitrogen oxides. As a result the reduction catalyst must be designed sufficiently large and the control of Reducing agent dosage work exactly, especially during a transient engine operation, as is common in a motor vehicle, to achieve a significant nitrogen oxide reduction.
Ein Katalysator der eingangs genannten Art umgeht diese Problematik, indem dem Reduktionskatalysator abströmseitig ein Oxidationskatalysator zur Oxidation des Reduktionsmittels aufgebracht ist. An diesem Oxidationskatalysator wird in Anwesenheit von Sauerstoff das Reduktionsmittel, insbesondere Ammoniak, in unschädliche Verbindungen, insbesondere molekularer Stickstoff und Wasser, oxidiert.One Catalyst of the type mentioned circumvents this problem, by the reduction catalyst downstream of an oxidation catalyst for Oxidation of the reducing agent is applied. At this oxidation catalyst In the presence of oxygen, the reducing agent, in particular Ammonia, harmless Compounds, in particular molecular nitrogen and water, oxidized.
Hierzu
ist der einstückig
hergestellte Reduktionskatalysator gemäß der
Nachteiligerweise weist ein derartiger Katalysator unerwünschte Nebenreaktionen auf. So können erneut Stickoxide gebildet werden. Auch kann beispielsweise Ammoniak bei vorhandenem Luftüberschuss zu Lachgas oder Ammoniumnitrat umgesetzt werden. Gegebenenfalls können im Abgas vorhandene Kohlenwasserstoffe zu schädlichen Nitroverbindungen reagieren.Unfortunately, such catalyst has undesirable side reactions. So can again nitrogen oxides are formed. Also, for example, ammonia in the presence of excess air be converted to nitrous oxide or ammonium nitrate. Possibly can hydrocarbons present in the exhaust gas react to harmful nitro compounds.
Gemäß der
Aufgabe der Erfindung ist es, einen Katalysator der eingangs genannten Art anzugeben, der unter Vermeidung eines Reduktionsmittelschlupfes und unerwünschter Nebenreaktionen einen möglichst hohen Umsetzungsgrad für Stickoxide ermöglicht, und der möglichst vielseitig einsetzbar ist.task The invention is a catalyst of the type mentioned specify, while avoiding a Reduktionsmittelschlupfes and unwanted Side reactions as possible high degree of conversion for Allows nitrogen oxides, and the possible is versatile.
Diese Aufgabe wird für einen Katalysator gemäß dem Oberbegriff von Anspruch 1 erfindungsgemäß dadurch gelöst, dass der Reduktionskatalysator aus einer Anzahl von Einzelkatalysatoren zusammengesetzt ist, wobei der Oxidationskatalysator dem oder den abströmseitig letzten Einzelkatalysator/-en aufgebracht ist. Umfangreiche Untersuchungen haben ergeben, dass mit einem Reduktionskatalysator, auf den abströmseitig ein Oxidationskatalysator aufgebracht ist, unerwünschte Nebenreaktionen sicher vermieden werden und ein hoher Umsetzungsgrad der Stickoxide erzielt werden kann, wenn der Oxidationskatalysator abströmseitig über einen Bereich aufgebracht ist, der 1–19% des gesamten Katalysatorvolumens beträgt.These Task is for a catalyst according to the preamble of claim 1 according to the invention thereby solved, that the reduction catalyst from a number of individual catalysts is composed, wherein the oxidation catalyst or the downstream last single catalyst / is applied. Extensive investigations have shown that with a reduction catalyst on the downstream side an oxidation catalyst is applied, unwanted side reactions safely avoided be achieved and a high degree of conversion of nitrogen oxides can, if the oxidation catalyst applied downstream over a range is that 1-19% the total catalyst volume is.
Ein derartiger Katalysator erlaubt überraschenderweise bereits eine stöchiometrische oder überstöchiometrische Zudosierung des Reduktionsmittels, so dass der Reduktionskatalysator eine maximal mögliche Menge an Stickoxiden umsetzt, ohne dass es zu einem Reduktionsmittelschlupf kommt. Dabei genügt bei kleinen Stickoxidkonzentrationen und stöchiometrischer Zudosierung des Reduktionsmittels bereits ein mit dem Oxidationskatalysator versehenes Volumen von 1%. Wird ein Volumen des gesamten Katalysators von mehr als 19% mit dem Oxidationskatalysator versehen, so treten verstärkt die erwähnten unerwünschten Nebenreaktionen auf. Insbesondere werden am Oxidationskatalysator in dem Zusammenspiel aus Stickstoff, Sauerstoff und unverbrauchtem Reduktionsmittel erneut Stickoxide gebildet. Ein über 19% hinausgehendes Volumen an Oxidationskatalysator dient somit nicht zum Abbau von Reduktionsmittel, sondern es werden dann an freien Adsorptionsplätzen unerwünschte Reaktionen katalysiert.Surprisingly, such a catalyst already allows a stoichiometric or superstoichiometric metered addition of the reducing agent, so that the reduction catalyst converts a maximum possible amount of nitrogen oxides, without that there is a reductant slip. At low nitrogen oxide concentrations and stoichiometric metered addition of the reducing agent, a volume of 1% provided with the oxidation catalyst is sufficient. If a volume of the entire catalyst of more than 19% is provided with the oxidation catalyst, then the mentioned undesired side reactions occur increasingly. In particular, nitrogen oxides are formed again on the oxidation catalyst in the interaction of nitrogen, oxygen and unconsumed reducing agent. A volume of oxidation catalyst which exceeds 19% thus does not serve to degrade the reducing agent, but undesirable reactions are then catalysed at free adsorption sites.
Der angegebene Katalysator lässt sich kostengünstig herstellen, da keine zwei getrennten Katalysatoren für die Reduktion bzw. für die Oxidation gefertigt werden müssen. Zur Herstellung wird der Reduktionskatalysator in an sich bekannter Weise gefertigt. Anschließend wird auf diesen Reduktionskatalysator zur Schaffung des Oxidationskatalysators abströmseitig die Zusammensetzung der katalytisch aktiven Oberfläche geändert. Dies kann z.B. durch Neubeschichten oder durch das Einbringen von die Oxidation des Reduktionsmittels katalysierenden Verbindungen oder Elementen geschehen. Alternativ wäre auch das Ersetzen der bereits vorhandenen hinsichtlich der Reduktion katalytisch aktiven Oberfläche vorstellbar.Of the specified catalyst leaves cost-effective because no two separate catalysts for the reduction or for the oxidation must be made. For the preparation of the reduction catalyst is known per se Made way. Subsequently is downstream of this reduction catalyst to create the oxidation catalyst changed the composition of the catalytically active surface. This can e.g. by re-stratifying or by introducing the oxidation the reducing agent catalysing compounds or elements happen. Alternative would be also replacing the already existing in terms of reduction catalytically active surface imaginable.
Der Katalysator wird in den Abgaskanal einer Verbrennungsanlage und insbesondere in den Abgaskanal eines Verbrennungsmotors eingesetzt. Um verschiedenen räumlichen Gegebenheiten und Abgaszusammensetzungen flexibel begegnen zu können, ist der Reduktionskatalysator aus einer Anzahl von Einzelkatalysatoren zusammengesetzt, wobei der Oxidationskatalysator dem oder den abströmseitig letzten Einzelkatalysator/-en aufgebracht ist. Hierbei kann modulartig die gewünschte Länge des Reduktionskatalysators über die Anzahl der Einzelkatalysatoren eingestellt werden. Der hinsichtlich des gesamten Katalysatorvolumens gewünschte abströmseitige Bereich, der als Oxidationskatalysator wirkt, kann sich dabei über mehrere der Einzelkatalysatoren abströmseitig erstrecken. Bei einem kleinen Volumenbereich oder bei relativ langen Einzelkatalysatoren ist lediglich der in Strömungsrichtung des Abgases betrachtet letzte Einzelkatalysator entsprechend mit dem Oxidationskatalysator versehen. Die modulartige Ausgestaltung des Katalysators im Ganzen bietet einen Kostenvorteil, da hierdurch die Typenvielfalt der herzustellenden Katalysatoren deutlich reduziert ist. Weiterhin wird durch die kürzeren Einzelmodule eine geringere thermische Belastung der Monolithe erzielt.Of the Catalyst is placed in the exhaust duct of an incinerator and used in particular in the exhaust passage of an internal combustion engine. To different spatial Being able to meet conditions and exhaust gas compositions flexibly, is the reduction catalyst from a number of individual catalysts composed, wherein the oxidation catalyst or the downstream last single catalyst / is applied. This can be modular the desired Length of the Reduction catalyst over the number of individual catalysts can be adjusted. The respect the entire catalyst volume desired downstream side Area, which acts as an oxidation catalyst, can be over several the individual catalysts downstream extend. For a small volume range or for a relatively long one Single catalysts is only considered in the flow direction of the exhaust gas last single catalyst corresponding to the oxidation catalyst Mistake. The modular design of the catalyst as a whole offers a cost advantage, as this the variety of types to be produced Catalysts is significantly reduced. Furthermore, by the shorter individual modules achieved a lower thermal load of the monoliths.
Der Reduktionskatalysator oder die Einzelkatalysatoren als solche können als ein Trägerkatalysator mit einer SCR-aktiven Beschichtung ausgebildet sein, worauf dann der Oxidationskatalysator aufgebracht ist. In dieser Ausgestaltungsvariante wird die katalytisch aktive Beschichtung auf ein in der Regel plattenförmiges Trägermaterial aufgebracht. Die beschichteten Trägerplatten werden dann zur Ausbildung des Katalysators gestapelt, wobei für das durchströmende Abgas Strömungskanäle durch in das Trägermaterial eingebrachte Sicken und/oder Wellen gebildet werden.Of the Reduction catalyst or the individual catalysts as such can as a supported catalyst be formed with an SCR-active coating, then what the oxidation catalyst is applied. In this embodiment variant is the catalytically active coating on a usually plate-shaped carrier material applied. The coated carrier plates are then used for Formation of the catalyst stacked, wherein for the exhaust gas flowing through Flow channels through in the carrier material introduced beads and / or waves are formed.
In einer anderen vorteilhaften Ausgestaltung ist der Reduktionskatalysator als ein SCR-aktives Vollextrudat ausgebildet, worauf der Oxidationskatalysator aufgebracht ist. Das Vollextrudat besteht hierbei aus einer keramischen Masse, die als eine Aufschlämmung von Metalloxiden, insbesondere Titandioxid, hergestellt und extrudiert wird. Der so hergestellte Formkörper wird anschließend getrocknet und zur Keramik kalziniert. Das Vollextrudat umfasst eine Reihe von durchgängigen Poren, durch welche das Abgas strömt und mit der Oberfläche des Katalysators in Berührung kommt.In In another advantageous embodiment, the reduction catalyst formed as an SCR-active Vollextrudat, whereupon the oxidation catalyst is applied. The Vollextrudat consists of a ceramic Mass acting as a slurry of metal oxides, in particular titanium dioxide, produced and extruded becomes. The molded body thus produced will follow dried and calcined to ceramic. The solid extrudate comprises a series of continuous Pores through which the exhaust gas flows and with the surface of the Catalyst in contact comes.
Während demnach das Vollextrudat aus einer keramischen Masse gefertigt ist, die insgesamt SCR-aktiv ist, ist das katalytisch aktive Material, welches insbesondere die gleiche Zusammensetzung wie die Masse des Vollextrudats aufweisen kann, bei dem Trägerkatalysator auf das Trägermaterial aufgebracht. Dies kann durch Auftragen oder Eintauchen des Trägermaterials geschehen. Zwischen dem SCR-aktiven Material und dem Trägermaterial kann auch eine Schicht aus einem Aluminiumoxid aufgetragen sein. Alternativ zu einer Titandioxid-Keramik kann auch ein Zeolith als die katalytisch aktiven weiteren Komponenten beinhaltendes Material eingesetzt sein.While accordingly the Vollextrudat is made of a ceramic mass, the SCR active is the catalytically active material which in particular the same composition as the mass of the Vollextrudats in the supported catalyst on the carrier material applied. This can be done by applying or dipping the substrate happen. Between the SCR-active material and the carrier material It is also possible to apply a layer of an aluminum oxide. As an alternative to a titanium dioxide ceramic can also be a zeolite as the catalytically active further components containing material be used.
In einer vorteilhaften Ausgestaltung der Erfindung ist der Oxidationskatalysator dem Reduktionskatalysator als eine Tränkung oder Imprägnierung aufgebracht. Hierbei wird der später als Oxidationskatalysator wirkende Teil des Reduktionskatalysators beispielsweise in eine Lösung eingetaucht, die eine Oxidation katalysierende Substanzen bzw. deren reaktive Vorläufer enthält. Diese Substanzen schlagen sich dabei auf der offenen Oberfläche des katalytisch aktiven Materials des Reduktionskatalysators nieder bzw. dringen in das Volumen des Materials ein. Durch eine gegebenenfalls erforderliche Nachbehandlung, wie eine Temperaturbehandlung in entsprechender Atmosphäre, wird dann das imprägnierte Material des Reduktionskatalysators zu dem katalytisch aktiven Material des Oxidationskatalysators umgebildet.In An advantageous embodiment of the invention is the oxidation catalyst the reduction catalyst as a saturation or impregnation applied. This is the later acting as an oxidation catalyst part of the reduction catalyst for example, in a solution submerged, the oxidation catalyzing substances or their reactive precursors contains. These substances are thereby impacted on the open surface of the catalytic active material of the reduction catalyst down or penetrate into the volume of the material. By any necessary after-treatment, how a temperature treatment in appropriate atmosphere, will then the impregnated Material of the reduction catalyst to the catalytically active material transformed the oxidation catalyst.
Das katalytisch aktive Material des Reduktionskatalysators, welches sowohl als Beschichtung für das Trägermaterial des Plattenkatalysators als auch als Material des Vollextrudats Verwendung findet, umfasst vorteilhafterweise überwiegend Titandioxid sowie als Zusätze Vanadium, Molybdän, Wolfram und/oder deren Oxide.The catalytically active material of Redukti onskatalysators, which is used both as a coating for the support material of the plate catalyst and as a material of the bulk extrudate advantageously comprises predominantly titanium dioxide and as additives vanadium, molybdenum, tungsten and / or their oxides.
Hinsichtlich einer großen katalytisch aktiven Oberfläche wird dabei Titandioxid in der Anatas-Struktur verwendet. Ein derartiges Titandioxid kann beispielsweise flammhydrolytisch oder durch Fällung hergestellt sein.Regarding a big one catalytically active surface Titanium dioxide is used in the anatase structure. Such a thing Titanium dioxide can be produced, for example, by flame hydrolysis or by precipitation be.
Das katalytisch aktive Material des Oxidationskatalysators umfasst vorzugsweise ebenfalls überwiegend Titandioxid sowie als Zusätze Platin, Rhodium und/oder Palladium. Die Edelmetalle können durch Imprägnierung des katalytisch aktiven Materials des Reduktionskatalysators mit einer wässrigen Lösung von Hexachloroplatinsäure, Palladiumchlorid und/oder Rhodiumchlorid eingebracht werden.The Catalytically active material of the oxidation catalyst preferably comprises also predominantly Titanium dioxide and as additives Platinum, rhodium and / or palladium. The precious metals can through impregnation of the catalytically active material of the reduction catalyst an aqueous solution of hexachloroplatinic acid, Palladium chloride and / or rhodium chloride are introduced.
Alternativ kann auf das katalytisch aktive Material des Reduktionskatalysators als Oxidationsbeschichtung ein γ-Aluminiumoxid mit Zusätzen von Ceroxid und Zirkonoxid aufgebracht werden. Die Edelmetalle werden dann in das Aluminiumoxid eingebracht. Als Aluminiumoxid kann auch ein Cordierit, d.h. ein Magnesium-Aluminium-Silikat, eingesetzt werden. Im Übrigen kann das γ-Aluminiumoxid auch als Beschichtung auf dem Plattenkatalysator aufgebracht sein und zur Ausbildung des katalytisch aktiven Materials des Reduktionskatalysators mit den entsprechenden Substanzen imprägniert werden.alternative can on the catalytically active material of the reduction catalyst as oxidation coating a γ-alumina with additives of ceria and zirconia are applied. The precious metals will be then introduced into the alumina. As alumina can also a cordierite, i. a magnesium-aluminum silicate used. Furthermore may be the γ-alumina also be applied as a coating on the plate catalyst and for the formation of the catalytically active material of the reduction catalyst be impregnated with the appropriate substances.
Ausführungsbeispiele der Erfindung werden anhand einer Zeichnung näher erläutert. Dabei zeigen:embodiments The invention will be explained in more detail with reference to a drawing. Showing:
Der
dargestellte Katalysator
Der
Volumenanteil des Oxidationskatalysators
In
Zur
Reinigung strömt
das Abgas
Der
im Abgasrohr
Zur
Entfernung der im Abgas
Die
zugeleitete wässrige
Harnstofflösung wird
schließlich
im Abgasrohr
Das
entsprechend der Stickoxidkonzentration in etwa stöchiometrisch
zudosierte Ammoniak wird an dem Reduktionskatalysator
Das
von Stickoxiden unter optimaler Ausnutzung des Reduktionskatalysators
- 11
- Katalysatorcatalyst
- 22
- Reduktionskatalysatorreduction catalyst
- 33
- Oxidationskatalysatoroxidation catalyst
- 55
- Abgasexhaust
- 66
- Abgasreinigungsanlageemission control system
- 88th
- Dieselmotordiesel engine
- 1010
- Auspuffkrümmerexhaust
- 1212
- Abgasrohrexhaust pipe
- 1414
- AuspuffExhaust
- 1515
- Einzelkatalysatorsingle catalyst
- 1616
- Einzelkatalysatorsingle catalyst
- 1818
- Vorratsbehälterreservoir
- 1919
- Zuführleitungfeed
- 2020
- Steuerventilcontrol valve
- 2121
- Zerstäuberdüseatomizer
Claims (7)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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DE102006011411A DE102006011411B3 (en) | 2006-03-11 | 2006-03-11 | catalyst |
DE202006020151U DE202006020151U1 (en) | 2006-03-11 | 2006-03-11 | catalyst |
EP07703095A EP1993709A1 (en) | 2006-03-11 | 2007-01-29 | Catalyst for exhaust gas cleaning consisting of a number of individual catalysts |
PCT/EP2007/000735 WO2007104382A1 (en) | 2006-03-11 | 2007-01-29 | Catalyst for exhaust gas cleaning consisting of a number of individual catalysts |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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DE102006011411A DE102006011411B3 (en) | 2006-03-11 | 2006-03-11 | catalyst |
Publications (1)
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DE102006011411B3 true DE102006011411B3 (en) | 2007-11-29 |
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ID=38110621
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DE202006020151U Expired - Lifetime DE202006020151U1 (en) | 2006-03-11 | 2006-03-11 | catalyst |
DE102006011411A Revoked DE102006011411B3 (en) | 2006-03-11 | 2006-03-11 | catalyst |
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EP (1) | EP1993709A1 (en) |
DE (2) | DE202006020151U1 (en) |
WO (1) | WO2007104382A1 (en) |
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GB2493987B (en) | 2011-08-26 | 2014-03-19 | Jc Bamford Excavators Ltd | An engine system |
EP2607641A1 (en) | 2011-12-19 | 2013-06-26 | Mtu Friedrichshafen Gmbh | Mixer device for introducing a reducing agent to an exhaust gas flow with blade-shaped means |
EP2792864A1 (en) | 2013-04-17 | 2014-10-22 | ROTH-TECHNIK AUSTRIA Gesellschaft m.b.H. | Exhaust gas processing device for an exhaust gas flow of a combustion engine |
EP3111071B1 (en) | 2014-02-28 | 2019-01-02 | Scania CV AB | Method and system for controlling nitrogen oxide emissions from a combustion engine |
WO2015128247A1 (en) * | 2014-02-28 | 2015-09-03 | Haldor Topsøe A/S | Method for the cleaning of exhaust gas from a compression ignition engine |
SE539803C2 (en) | 2015-06-05 | 2017-12-05 | Scania Cv Ab | A method and a system for determining a composition of a gasmix in a vehicle |
SE539129C2 (en) | 2015-08-27 | 2017-04-11 | Scania Cv Ab | Process and system for processing a single stream combustion exhaust stream |
EP3341596B1 (en) | 2015-08-27 | 2021-07-28 | Scania CV AB | Method and exhaust treatment system for treatment of an exhaust gas stream |
SE539133C2 (en) | 2015-08-27 | 2017-04-11 | Scania Cv Ab | Exhaust gas treatment system and method for treating an exhaust gas stream |
SE539131C2 (en) | 2015-08-27 | 2017-04-11 | Scania Cv Ab | Process and exhaust treatment system for treating an exhaust stream |
SE539134C2 (en) | 2015-08-27 | 2017-04-11 | Scania Cv Ab | Exhaust gas treatment system and method for treating an exhaust gas stream |
SE539130C2 (en) | 2015-08-27 | 2017-04-11 | Scania Cv Ab | Process and exhaust treatment system for treating an exhaust stream |
DE102016004333A1 (en) | 2016-04-13 | 2017-10-19 | Roth Technik Austria Gesellschaft Mit Beschränkter Haftung | Exhaust after-treatment device with catalyst and mixing device |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0410440B1 (en) * | 1989-07-28 | 1994-03-09 | Degussa Aktiengesellschaft | Catalyst for purification of gases from overstoichiometric process in combustion motors and gas turbines |
EP1264628A1 (en) * | 2001-06-09 | 2002-12-11 | OMG AG & Co. KG | Redox catalyst fot the selective catalytic reduction of nitrogen oxides in the exhaust gases of diesel engines with ammoniac and preparation process thereof |
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US7481983B2 (en) * | 2004-08-23 | 2009-01-27 | Basf Catalysts Llc | Zone coated catalyst to simultaneously reduce NOx and unreacted ammonia |
-
2006
- 2006-03-11 DE DE202006020151U patent/DE202006020151U1/en not_active Expired - Lifetime
- 2006-03-11 DE DE102006011411A patent/DE102006011411B3/en not_active Revoked
-
2007
- 2007-01-29 WO PCT/EP2007/000735 patent/WO2007104382A1/en active Application Filing
- 2007-01-29 EP EP07703095A patent/EP1993709A1/en not_active Withdrawn
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0410440B1 (en) * | 1989-07-28 | 1994-03-09 | Degussa Aktiengesellschaft | Catalyst for purification of gases from overstoichiometric process in combustion motors and gas turbines |
EP1264628A1 (en) * | 2001-06-09 | 2002-12-11 | OMG AG & Co. KG | Redox catalyst fot the selective catalytic reduction of nitrogen oxides in the exhaust gases of diesel engines with ammoniac and preparation process thereof |
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DE202006020151U1 (en) | 2007-11-29 |
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