KR100438753B1 - 배기가스 정화용 촉매 - Google Patents
배기가스 정화용 촉매 Download PDFInfo
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- KR100438753B1 KR100438753B1 KR10-2000-0047755A KR20000047755A KR100438753B1 KR 100438753 B1 KR100438753 B1 KR 100438753B1 KR 20000047755 A KR20000047755 A KR 20000047755A KR 100438753 B1 KR100438753 B1 KR 100438753B1
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- Prior art keywords
- catalyst
- layer
- exhaust gas
- purification
- carrier
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- 239000003054 catalyst Substances 0.000 title claims abstract description 223
- 239000000463 material Substances 0.000 claims abstract description 53
- 238000000746 purification Methods 0.000 claims abstract description 52
- 239000002594 sorbent Substances 0.000 claims abstract description 47
- 230000002378 acidificating effect Effects 0.000 claims abstract description 40
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 claims description 279
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 71
- 229910052700 potassium Inorganic materials 0.000 claims description 71
- 239000011591 potassium Substances 0.000 claims description 71
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 69
- 229910052878 cordierite Inorganic materials 0.000 claims description 68
- 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 68
- 239000007789 gas Substances 0.000 claims description 68
- 239000010457 zeolite Substances 0.000 claims description 49
- 229910021536 Zeolite Inorganic materials 0.000 claims description 45
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 claims description 45
- 239000000377 silicon dioxide Substances 0.000 claims description 34
- 230000001629 suppression Effects 0.000 claims description 20
- 150000001875 compounds Chemical class 0.000 claims description 17
- 239000003112 inhibitor Substances 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 14
- 239000002253 acid Substances 0.000 claims description 11
- 229910052783 alkali metal Inorganic materials 0.000 claims description 11
- 150000001340 alkali metals Chemical class 0.000 claims description 11
- 239000000126 substance Substances 0.000 claims description 10
- 239000003795 chemical substances by application Substances 0.000 claims description 8
- 230000002401 inhibitory effect Effects 0.000 claims description 8
- 230000009257 reactivity Effects 0.000 claims description 7
- 239000003638 chemical reducing agent Substances 0.000 claims description 6
- 239000002131 composite material Substances 0.000 claims description 6
- 230000007704 transition Effects 0.000 claims description 6
- 229910052721 tungsten Inorganic materials 0.000 claims description 6
- 239000013078 crystal Substances 0.000 claims description 5
- WFKWXMTUELFFGS-UHFFFAOYSA-N tungsten Chemical compound [W] WFKWXMTUELFFGS-UHFFFAOYSA-N 0.000 claims description 5
- 239000010937 tungsten Substances 0.000 claims description 5
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 4
- 229910052719 titanium Inorganic materials 0.000 claims description 4
- 239000010936 titanium Substances 0.000 claims description 4
- 239000002250 absorbent Substances 0.000 abstract description 5
- 230000035515 penetration Effects 0.000 abstract description 5
- 230000002745 absorbent Effects 0.000 abstract description 4
- 238000001704 evaporation Methods 0.000 abstract description 3
- 230000008020 evaporation Effects 0.000 abstract description 3
- 238000002156 mixing Methods 0.000 abstract description 3
- 230000009467 reduction Effects 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 128
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 15
- 239000012298 atmosphere Substances 0.000 description 9
- 239000000446 fuel Substances 0.000 description 9
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 8
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 8
- 238000005341 cation exchange Methods 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 239000000843 powder Substances 0.000 description 8
- 229910052788 barium Inorganic materials 0.000 description 7
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 7
- 238000002485 combustion reaction Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 7
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 6
- 239000007864 aqueous solution Substances 0.000 description 6
- 239000011248 coating agent Substances 0.000 description 6
- 238000000576 coating method Methods 0.000 description 6
- 238000004453 electron probe microanalysis Methods 0.000 description 6
- 238000000921 elemental analysis Methods 0.000 description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 6
- 150000003839 salts Chemical class 0.000 description 6
- 229910052710 silicon Inorganic materials 0.000 description 6
- 239000010703 silicon Substances 0.000 description 6
- 150000003377 silicon compounds Chemical class 0.000 description 6
- 229910002651 NO3 Inorganic materials 0.000 description 5
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 5
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 5
- 150000001342 alkaline earth metals Chemical class 0.000 description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 5
- 150000002823 nitrates Chemical class 0.000 description 5
- 230000009471 action Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 4
- 230000007423 decrease Effects 0.000 description 4
- 230000006866 deterioration Effects 0.000 description 4
- 239000000395 magnesium oxide Substances 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910052757 nitrogen Inorganic materials 0.000 description 4
- 229910000510 noble metal Inorganic materials 0.000 description 4
- 239000002002 slurry Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 229910017090 AlO 2 Inorganic materials 0.000 description 3
- 229910004298 SiO 2 Inorganic materials 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000006185 dispersion Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- NLKNQRATVPKPDG-UHFFFAOYSA-M potassium iodide Chemical compound [K+].[I-] NLKNQRATVPKPDG-UHFFFAOYSA-M 0.000 description 3
- 230000000717 retained effect Effects 0.000 description 3
- 235000012239 silicon dioxide Nutrition 0.000 description 3
- 238000001179 sorption measurement Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- 239000004408 titanium dioxide Substances 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- TZCXTZWJZNENPQ-UHFFFAOYSA-L barium sulfate Chemical compound [Ba+2].[O-]S([O-])(=O)=O TZCXTZWJZNENPQ-UHFFFAOYSA-L 0.000 description 2
- 239000002585 base Substances 0.000 description 2
- 150000001768 cations Chemical class 0.000 description 2
- 239000000470 constituent Substances 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000011777 magnesium Substances 0.000 description 2
- 238000002844 melting Methods 0.000 description 2
- 230000008018 melting Effects 0.000 description 2
- 229910052680 mordenite Inorganic materials 0.000 description 2
- 150000002927 oxygen compounds Chemical class 0.000 description 2
- 229910052697 platinum Inorganic materials 0.000 description 2
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical group [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- 229910052717 sulfur Inorganic materials 0.000 description 2
- 239000011593 sulfur Substances 0.000 description 2
- 238000004846 x-ray emission Methods 0.000 description 2
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000000441 X-ray spectroscopy Methods 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000003776 cleavage reaction Methods 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000008034 disappearance Effects 0.000 description 1
- 239000002270 dispersing agent Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- -1 for example Substances 0.000 description 1
- 150000004677 hydrates Chemical class 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 229910052750 molybdenum Inorganic materials 0.000 description 1
- 229910052758 niobium Inorganic materials 0.000 description 1
- 235000010333 potassium nitrate Nutrition 0.000 description 1
- 239000004323 potassium nitrate Substances 0.000 description 1
- 229910052939 potassium sulfate Inorganic materials 0.000 description 1
- 235000011151 potassium sulphates Nutrition 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 229910052814 silicon oxide Inorganic materials 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
- 229910052720 vanadium Inorganic materials 0.000 description 1
Classifications
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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
- B01J23/02—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the alkali- or alkaline earth metals or beryllium
-
- 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
- B01D53/9413—Processes characterised by a specific catalyst
- B01D53/9422—Processes characterised by a specific catalyst for removing nitrogen oxides by NOx storage or reduction by cyclic switching between lean and rich exhaust gases (LNT, NSC, NSR)
-
- 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
-
- 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
- B01J23/58—Platinum group metals with alkali- or alkaline earth metals
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
-
- 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
-
- 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
- B01J37/0246—Coatings comprising a zeolite
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/202—Alkali metals
- B01D2255/2022—Potassium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/20—Metals or compounds thereof
- B01D2255/204—Alkaline earth metals
-
- 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
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/50—Zeolites
-
- 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
- B01J35/00—Catalysts, in general, characterised by their form or physical properties
- B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
- B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/49—Method of mechanical manufacture
- Y10T29/49345—Catalytic device making
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Combustion & Propulsion (AREA)
- Biomedical Technology (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Analytical Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Catalysts (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
Claims (19)
- 담체(10)와 촉매층(20)을 포함하고, 이 촉매층에 알칼리 금속을 흡장제로서 첨가하여 이루어지는 배기 가스 정화용 촉매에 있어서,상기 흡장제는 칼륨을 포함하고, 상기 담체는 코디어라이트(cordierite)로 구성되고, 상기 촉매층내에 억제제(30)를 설치하여 상기 촉매에서의 상기 흡장제의 이동을 억제하는 것을 특징으로 하는 배기 가스 정화용 촉매.
- 제 1 항에 있어서, 상기 억제제(30)를 상기 촉매층(20)중에 분산 혼합시킨 것을 특징으로 하는 배기 가스 정화용 촉매.
- 제 2 항에 있어서, 상기 억제제(30)는 IV족, V족 및 VI족의 천이 원소 및 IV족, V족 및 VI족의 전형 원소로부터 선택되는 하나 이상의 산성 물질을 포함하는 산성 산화물과, 상기 하나 이상의 산성 물질을 포함하는 복합 산화물과, 질소 산화물과 상기 흡장제와의 반응성을 저해하지 않는 재료와, 환원물질을 흡착하는 재료로 이루어지는 군으로부터 선택되는 하나 이상의 재료를 포함하여 이루어지는 것을 특징으로 하는 배기 가스 정화용 촉매.
- 제 2 항에 있어서, 상기 억제제(30)는 제올라이트를 포함하는 것을 특징으로 하는 배기 가스 정화용 촉매.
- 제 2 항에 있어서, 상기 억제제(30)가 실리카, 티타늄 및 텅스텐중 하나 이상의 산성 물질로 이루어지는 산성 산화물을 포함하는 것을 특징으로 하는 배기 가스 정화용 촉매.
- 제 2 항에 있어서,상기 담체(10)는 다공질 담체로 이루어지는 것을 특징으로 하는 배기 가스 정화용 촉매.
- 담체와 촉매층을 포함하고, 이 촉매층에 알칼리 금속을 흡장제로서 첨가하여 이루어지는 배기 가스 정화용 촉매에 있어서,상기 흡장제는 칼륨을 포함하고, 상기 담체는 코디어라이트(cordierite)로 구성되고, 상기 촉매층내에 층상으로 억제층을 설치하여 상기 촉매에서의 상기 흡장제의 이동을 억제하는 것을 특징으로 하는 배기 가스 정화용 촉매.
- 제 7 항에 있어서, 상기 억제층을 상기 담체와 상기 촉매층과의 사이 및 상기 촉매층중 또는 상기 촉매층(130)의 외면의 하나 이상의 위치에 형성한 것을 특징으로 하는 배기 가스 정화용 촉매.
- 제 7 항에 있어서, 상기 억제층이 IV족, V족 및 VI족의 천이 원소 및 IV족, V 족 및 VI족의 전형 원소로부터 선택되는 하나 이상의 산성 물질을 포함하는 산성 산화물과, 상기 하나 이상의 산성 물질을 포함하는 복합 산화물과, 질소 산화물과 상기 흡장제와의 반응성을 저해하지 않는 재료와, 환원물질을 흡착하는 재료로 이루어지는 군으로부터 선택되는 하나 이상의 재료로 구성되는 것을 특징으로 하는 배기 가스 정화용 촉매.
- 제 7 항에 있어서, 상기 억제층이 제올라이트를 포함하는 것을 특징으로 하는 배기 가스 정화용 촉매.
- 제 7 항에 있어서, 상기 억제층이 실리카, 티타늄 및 텅스텐의 적어도 하나의 산성 물질로 이루어지는 산성 산화물을 포함하는 것을 특징으로 하는 배기 가스 정화용 촉매.
- 제 7 항에 있어서,상기 담체는 다공질 담체로 이루어지는 것을 특징으로 하는 배기 가스 정화용 촉매.
- 제 7 항에 있어서, 상기 억제층은 산성도가 높은 층, 비표면적이 높은 층, 결정 격자가 작은 층, 분자량이 큰 원소 화합물로 이루어지는 층, 또는 염기성도가 높은 층 중 어느 하나로 구성되는 것을 특징으로 하는 배기 가스 정화용 촉매.
- 제 8 항에 있어서, 상기 억제층이 IV족, V족 및 VI족의 천이 원소 및 IV족, V 족 및 VI족의 전형 원소로부터 선택되는 하나 이상의 산성 물질을 포함하는 산성 산화물과, 상기 하나 이상의 산성 물질을 포함하는 복합 산화물과, 질소 산화물과 상기 흡장제와의 반응성을 저해하지 않는 재료와, 환원물질을 흡착하는 재료로 이루어지는 군으로부터 선택되는 하나 이상의 재료로 구성되는 것을 특징으로 하는 배기 가스 정화용 촉매.
- 제 8 항에 있어서, 상기 억제층은 제올라이트를 포함하는 것을 특징으로 하는 배기 가스 정화용 촉매.
- 제 8 항에 있어서, 상기 억제층은 실리카, 티타늄 및 텅스텐의 하나 이상의 산성 물질로 이루어지는 산성 산화물을 포함하는 것을 특징으로 하는 배기 가스 정화용 촉매.
- 제 8 항에 있어서,상기 담체는 다공질 담체로 이루어지는 것을 특징으로 하는 배기 가스 정화용 촉매.
- 제 8 항에 있어서, 상기 억제층은 산성도가 높은 층, 비표면적이 높은 층, 결정 격자가 작은 층, 분자량이 큰 원소 화합물로 이루어지는 층, 또는 염기성도가 높은 층 중 어느 하나로 구성되는 것을 특징으로 하는 배기 가스 정화용 촉매.
- 제 12 항에 있어서, 상기 억제층은 산성도가 높은 층, 비표면적이 높은 층, 결정격자가 작은 층, 분자량이 큰 원소 화합물로 이루어지는 층, 또는 염기성도가 높은 층 중 어느 하나로 구성되는 것을 특징으로 하는 배기 가스 정화용 촉매.
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JP23435999 | 1999-08-20 | ||
JP99-234359 | 1999-08-20 | ||
JP99-370358 | 1999-12-27 | ||
JP37035899A JP4209059B2 (ja) | 1999-08-20 | 1999-12-27 | 排ガス浄化用触媒 |
JP99-370357 | 1999-12-27 | ||
JP37035799A JP2001179098A (ja) | 1999-12-27 | 1999-12-27 | 排ガス浄化用触媒 |
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US (2) | US6537946B1 (ko) |
EP (1) | EP1078678B8 (ko) |
KR (1) | KR100438753B1 (ko) |
DE (1) | DE60043522D1 (ko) |
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DE60043522D1 (de) * | 1999-08-20 | 2010-01-28 | Mitsubishi Motors Corp | Katalysator zur Reinigung von Abgasen |
JP2001232195A (ja) * | 1999-12-17 | 2001-08-28 | Ngk Insulators Ltd | 触媒体 |
US20020082164A1 (en) * | 2000-01-14 | 2002-06-27 | Danan Dou | Methods to reduce alkali material migration from NOx adsorber washcoat to cordierite |
DE60126515T2 (de) * | 2000-06-22 | 2007-11-22 | Mitsubishi Jidosha Kogyo K.K. | Katalysator zur Abgasreinigung |
EP1174173B1 (en) * | 2000-07-17 | 2013-03-20 | Mitsubishi Jidosha Kogyo Kabushiki Kaisha | Exhaust gas purifying catalyst |
JP2002282702A (ja) * | 2001-01-19 | 2002-10-02 | Ngk Insulators Ltd | 触媒体 |
WO2002062468A1 (fr) * | 2001-02-02 | 2002-08-15 | Hitachi, Ltd. | Catalyseur de traitement des gaz d'émission et moteur à combustion interne pourvu d'un tel catalyseur |
KR100492644B1 (ko) * | 2001-02-26 | 2005-06-02 | 미쓰비시 지도샤 고교(주) | 배기 가스 정화용 촉매 |
JP4645786B2 (ja) * | 2001-06-08 | 2011-03-09 | 三菱自動車工業株式会社 | 排ガス浄化用触媒 |
KR20030056792A (ko) * | 2001-12-28 | 2003-07-04 | 현대자동차주식회사 | 질소산화물 흡장 촉매 및 그 제조방법 |
EP1340541A1 (en) * | 2002-02-28 | 2003-09-03 | Corning Incorporated | Structured catalysts incorporating thick washcoats and method of preparation thereof |
JP4355469B2 (ja) * | 2002-03-08 | 2009-11-04 | 日本碍子株式会社 | アルミナ担持担体、触媒体及びアルミナ担持担体の製造方法 |
JP4228278B2 (ja) * | 2002-03-19 | 2009-02-25 | トヨタ自動車株式会社 | 排ガス浄化用触媒 |
US6964157B2 (en) * | 2002-03-28 | 2005-11-15 | Ricardo, Inc | Exhaust emission control system and method for removal and storage of vehicle exhaust gas nitrogen oxides during cold operation |
JP2004041852A (ja) * | 2002-07-09 | 2004-02-12 | Ngk Insulators Ltd | 触媒用担体及び触媒体 |
JP4404538B2 (ja) * | 2002-10-18 | 2010-01-27 | 日本碍子株式会社 | 排ガス浄化用炭化珪素質触媒体及びその製造方法 |
US7067454B2 (en) * | 2003-04-09 | 2006-06-27 | Honeywell International Inc. | Low cost quick response catalyst system |
JP2005305338A (ja) * | 2004-04-22 | 2005-11-04 | Toyota Motor Corp | 排ガス浄化触媒及びその製造方法 |
DE102006029668A1 (de) * | 2006-06-28 | 2008-01-03 | Süd-Chemie AG | Katalysator zur Oxidation von Kohlenwasserstoffen |
JP5173180B2 (ja) * | 2006-10-30 | 2013-03-27 | 株式会社キャタラー | 排ガス浄化用触媒 |
US8207084B2 (en) * | 2009-06-23 | 2012-06-26 | Ford Global Technologies, Llc | Urea-resistant catalytic units and methods of using the same |
US8926910B2 (en) | 2012-02-07 | 2015-01-06 | Ford Global Technologies, Llc | Hydrocarbon trap for reducing cold-start engine emissions |
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DE69523646T2 (de) * | 1994-02-04 | 2002-08-01 | Toyota Motor Co Ltd | Verfahren zur Herstellung eines Abgasreinigungskatalysators |
US6004521A (en) * | 1994-02-23 | 1999-12-21 | Toyota Jidosha Kabushiki Kaisha | Catalyst for purifying exhaust gases |
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JP2000176298A (ja) * | 1998-12-11 | 2000-06-27 | Mazda Motor Corp | 排気ガス浄化用触媒及びその製造方法 |
DE60043522D1 (de) * | 1999-08-20 | 2010-01-28 | Mitsubishi Motors Corp | Katalysator zur Reinigung von Abgasen |
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2000
- 2000-08-14 DE DE60043522T patent/DE60043522D1/de not_active Expired - Lifetime
- 2000-08-14 EP EP00117535A patent/EP1078678B8/en not_active Expired - Lifetime
- 2000-08-18 KR KR10-2000-0047755A patent/KR100438753B1/ko active IP Right Grant
- 2000-08-21 US US09/642,366 patent/US6537946B1/en not_active Expired - Lifetime
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EP0931590A1 (en) * | 1998-01-27 | 1999-07-28 | Mazda Motor Corporation | Catalyst for purifying exhaust gas and manufacturing method thereof |
Also Published As
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EP1078678A2 (en) | 2001-02-28 |
DE60043522D1 (de) | 2010-01-28 |
US6790808B2 (en) | 2004-09-14 |
US20030144132A1 (en) | 2003-07-31 |
EP1078678B8 (en) | 2010-02-17 |
EP1078678A3 (en) | 2001-09-19 |
EP1078678B1 (en) | 2009-12-16 |
KR20010067085A (ko) | 2001-07-12 |
US6537946B1 (en) | 2003-03-25 |
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