JP4725034B2 - 2重層コーティング構造のパラジウム三元触媒の製造方法 - Google Patents
2重層コーティング構造のパラジウム三元触媒の製造方法 Download PDFInfo
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- KDLHZDBZIXYQEI-UHFFFAOYSA-N Palladium Chemical compound [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 title claims description 187
- 239000003054 catalyst Substances 0.000 title claims description 99
- 229910052763 palladium Inorganic materials 0.000 title claims description 90
- 238000000576 coating method Methods 0.000 title claims description 39
- 239000011248 coating agent Substances 0.000 title claims description 37
- 238000004519 manufacturing process Methods 0.000 title description 19
- 239000002002 slurry Substances 0.000 claims description 69
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 39
- 239000002131 composite material Substances 0.000 claims description 29
- 239000002245 particle Substances 0.000 claims description 27
- 239000000203 mixture Substances 0.000 claims description 26
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 25
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 claims description 22
- MRELNEQAGSRDBK-UHFFFAOYSA-N lanthanum(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[La+3].[La+3] MRELNEQAGSRDBK-UHFFFAOYSA-N 0.000 claims description 22
- 229910000420 cerium oxide Inorganic materials 0.000 claims description 18
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 claims description 18
- 229910002546 FeCo Inorganic materials 0.000 claims description 16
- FZMFJORHWIAQFU-UHFFFAOYSA-N [Y].[Zr].[Ce] Chemical compound [Y].[Zr].[Ce] FZMFJORHWIAQFU-UHFFFAOYSA-N 0.000 claims description 14
- RCFVMJKOEJFGTM-UHFFFAOYSA-N cerium zirconium Chemical compound [Zr].[Ce] RCFVMJKOEJFGTM-UHFFFAOYSA-N 0.000 claims description 14
- 239000000919 ceramic Substances 0.000 claims description 13
- 238000001035 drying Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 10
- BOWRJOSABXTXBI-UHFFFAOYSA-N dioxopraseodymium Chemical compound O=[Pr]=O BOWRJOSABXTXBI-UHFFFAOYSA-N 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000003801 milling Methods 0.000 claims description 8
- 229910018072 Al 2 O 3 Inorganic materials 0.000 claims description 7
- 229910003447 praseodymium oxide Inorganic materials 0.000 claims description 6
- MMKQUGHLEMYQSG-UHFFFAOYSA-N oxygen(2-);praseodymium(3+) Chemical compound [O-2].[O-2].[O-2].[Pr+3].[Pr+3] MMKQUGHLEMYQSG-UHFFFAOYSA-N 0.000 claims description 5
- 239000000843 powder Substances 0.000 claims description 5
- 238000010304 firing Methods 0.000 claims description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 54
- 239000010410 layer Substances 0.000 description 16
- 239000000243 solution Substances 0.000 description 13
- 230000000694 effects Effects 0.000 description 10
- 239000011247 coating layer Substances 0.000 description 9
- 239000010948 rhodium Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 6
- 229910002091 carbon monoxide Inorganic materials 0.000 description 6
- 239000007789 gas Substances 0.000 description 6
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 5
- 238000000746 purification Methods 0.000 description 5
- 229910052703 rhodium Inorganic materials 0.000 description 5
- 239000007787 solid Substances 0.000 description 5
- 150000001875 compounds Chemical class 0.000 description 4
- 229910044991 metal oxide Inorganic materials 0.000 description 4
- 150000004706 metal oxides Chemical class 0.000 description 4
- 238000002156 mixing Methods 0.000 description 4
- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 3
- 229910052684 Cerium Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- GWXLDORMOJMVQZ-UHFFFAOYSA-N cerium Chemical compound [Ce] GWXLDORMOJMVQZ-UHFFFAOYSA-N 0.000 description 2
- 150000002430 hydrocarbons Chemical class 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910000510 noble metal Inorganic materials 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 238000010979 pH adjustment Methods 0.000 description 2
- 239000002356 single layer Substances 0.000 description 2
- 238000001179 sorption measurement Methods 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- NWZSZGALRFJKBT-KNIFDHDWSA-N (2s)-2,6-diaminohexanoic acid;(2s)-2-hydroxybutanedioic acid Chemical compound OC(=O)[C@@H](O)CC(O)=O.NCCCC[C@H](N)C(O)=O NWZSZGALRFJKBT-KNIFDHDWSA-N 0.000 description 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- 229910052777 Praseodymium Inorganic materials 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 230000032683 aging Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 229910002090 carbon oxide Inorganic materials 0.000 description 1
- 238000007598 dipping method Methods 0.000 description 1
- IKDUDTNKRLTJSI-UHFFFAOYSA-N hydrazine monohydrate Substances O.NN IKDUDTNKRLTJSI-UHFFFAOYSA-N 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000011259 mixed solution Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- PUDIUYLPXJFUGB-UHFFFAOYSA-N praseodymium atom Chemical compound [Pr] PUDIUYLPXJFUGB-UHFFFAOYSA-N 0.000 description 1
- 150000003283 rhodium Chemical class 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 239000011206 ternary composite Substances 0.000 description 1
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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
- B01D53/9445—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC]
- B01D53/945—Simultaneously removing carbon monoxide, hydrocarbons or nitrogen oxides making use of three-way catalysts [TWC] or four-way-catalysts [FWC] characterised by a specific catalyst
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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
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/89—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble 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
- B01J23/00—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00
- B01J23/002—Mixed oxides other than spinels, e.g. perovskite
-
- 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
- B01J23/70—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper
- B01J23/89—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals
- B01J23/8933—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals also combined with metals, or metal oxides or hydroxides provided for in groups B01J23/02 - B01J23/36
- B01J23/894—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of the iron group metals or copper combined with noble metals also combined with metals, or metal oxides or hydroxides provided for in groups B01J23/02 - B01J23/36 with rare earths or actinides
-
- 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
- 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
- B01J23/40—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of noble metals of the platinum group metals
- B01J23/44—Palladium
-
- 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
- B01J23/63—Platinum group metals with rare earths or actinides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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- B01J2523/00—Constitutive chemical elements of heterogeneous catalysts
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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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
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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
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- Combustion & Propulsion (AREA)
- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Catalysts (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Exhaust Gas After Treatment (AREA)
Description
また、本発明による2重層コーティング構造のパラジウム三元触媒は、自動車の排気ガス浄化用触媒及び産業用触媒などの製造時幅広く利用することができる。
本発明は、優れた窒素酸化物の除去性能と耐熱性とを有しながらも、高価なパラジウムの使用量を既存の触媒に比べ大幅節減したパラジウム三元触媒とする2重層コーティング構造のパラジウム三元触媒の製造方法に関するものである。
第1の工程は、アルミナ(Al2O3)に、バルク(bulk)の酸化セリウム(CeO2)、セリウム−ジルコニウム複合酸化物(Ce・Zr)O2およびセリウム−ジルコニウム−イットリウム複合酸化物(Ce・Zr・Y)O2を添加して、これに酸化プラセオジム(PrO2)を加えて1次混合物とする工程である。
酸化セリウム(CeO2)、セリウム−ジルコニウム複合酸化物(Ce・Zr)O2、及びセリウム−ジルコニウム−イットリウム複合酸化物(Ce・Zr・Y)O2の混合物は、担体の見掛け嵩に対し15〜25g/Lの割合とする。この添加範囲を外れると、前記同様、耐熱性向上の度合いが少なくなるため好ましくない。
酸化プラセオジム(PrO2)は、担体の見掛け嵩に対し2〜5g/Lの割合で加える。2g/L未満の少量では耐熱性向上及び窒素酸化物浄化効率が低くなる問題があり、5g/L以上では効果に比べコストが高くなる問題があって好ましくない。
この際、粒子の大きさが前記範囲を外れると、活性及び耐久性が低下する問題がある。ミリングにより、固形分が30〜50%で、粘度が200〜400cpsにする。
前記のような低パラジウム含量のパラジウム三元触媒の製造方法は、自動車排気ガス浄化用触媒及び産業用触媒などの製造に幅広く利用することができる。
アルミナ50gに、バルク(bulk)の酸化セリウム3.125g、セリウム−ジルコニウム複合酸化物7.5g及びセリウム−ジルコニウム−イットリウム複合酸化物1.875gの混合物を添加して、これに酸化プラセオジム3.0gを添加して1次混合物とした。この1次混合物に、酸化バリウム2.8g、酸化ランタン0.67g、酢酸13.5g及び水187.5mLでなる溶液を入れて、酢酸を使用してpHを4.2に調節して1次スラリーとした。
セラミックモノリス担体を第1触媒スラリーに浸してコーティングした後、乾燥炉で150℃の温度で2時間乾燥し、電気炉で500℃の温度で4時間焼成して、1次コーティング触媒とした。
アルミナ50gに、パラジウム4.0gが入っている溶液に含浸させた後、500℃の温度条件で3時間保持する熱固定化処理して還元させてパラジウム担持アルミナとした。次いで、このパラジウム担持アルミナに、バルク(bulk)の酸化セリウム3.125g、セリウム−ジルコニウム複合酸化物7.5g及びセリウム−ジルコニウム−イットリウム複合酸化物1.875gを混合して添加し、さらに酸化プラセオジム3.0gを加えてパラジウム含有1次混合物とした。
1次コーティング触媒を、第2触媒スラリーに浸してコーティングした後、乾燥炉で150℃の温度で2時間乾燥し、電気炉で500℃の温度で4時間焼成して、2重層コーティング構造のパラジウム三元触媒を完成した。
比較例として、パラジウム(Pd)を担体の見掛け嵩に対し7.0g/Lとした単一層コーティング構造のパラジウム三元触媒を公知の方法により製造した。
まず、アルミナ100gを、パラジウム7.0gが入っている溶液に含浸させた後、ヒドラジンヒドラート(hydrazine hydrate)をパラジウム1g当たり1.66mlとなるように添加して還元させた。
この触媒スラリーに、セラミックモノリス担体を浸してコーティングした後、乾燥炉で150℃の温度で2時間乾燥し、電気炉で500℃の温度で4時間焼成して、単一層構造のパラジウム三元触媒を完成した。
また、“950℃エージング”は、大気中で950℃の電気炉雰囲気下で140時間実施した結果である。
Claims (1)
- セラミックモノリス担体を、パラジウムを含まない第1触媒スラリーで1次コーティングし、乾燥及び焼成して1次コーティング触媒とし、次いで、前記1次コーティング触媒をパラジウムを含む第2触媒スラリーで2次コーティングし、乾燥及び焼成して2重層コーティング構造のパラジウム三元触媒を製造する方法であって、
前記第1触媒スラリーは、アルミナから1次混合物、1次スラリー、2次スラリーを経て製造され、
前記1次混合物が、アルミナ(Al2O3)に、酸化セリウム(CeO2)、セリウム−ジルコニウム複合酸化物(Ce・Zr)O2およびセリウム−ジルコニウム−イットリウム複合酸化物(Ce・Zr・Y)O2を(25:60:15)〜(20:60:20)の重量比で、前記セラミックモノリス担体の見掛け嵩に対し15〜25g/Lとなる割合で混合し、さらに酸化プラセオジム(PrO2)を前記セラミックモノリス担体の見掛け嵩に対し2〜5g/Lの割合で加えてなり、
前記1次スラリーが、前記1次混合物に、酸化バリウム、酸化ランタン、酢酸及び水からなる溶液を混合してなり、
前記2次スラリーが、前記1次スラリーに、(LaCe)(FeCo)O 3 と(LaSr)(FeCo)O 3 とから選ばれた一つを前記セラミックモノリス担体の見掛け嵩に対し15〜25g/Lの割合で加えてなり、
前記第1触媒スラリーが、前記2次スラリーを、ミリングして粒子の大きさ7μm以下のものが全体粒子の90%以上となるように微粉化したものであり、
前記第2触媒スラリーは、パラジウム担持アルミナからパラジウム含有1次混合物、パラジウム含有1次スラリー、パラジウム含有2次スラリーを経て製造され、
前記パラジウム含有1次混合物が、パラジウム担持アルミナ(Al2O3)に、酸化セリウム(CeO2)、セリウム−ジルコニウム複合酸化物(Ce・Zr)O2およびセリウム−ジルコニウム−イットリウム複合酸化物(Ce・Zr・Y)O2を(25:60:15)〜(20:60:20)の重量比で前記セラミックモノリス担体の見掛け嵩に対し15〜25g/Lの割合と混合し、さらに酸化プラセオジム(PrO2)を前記セラミックモノリス担体の見掛け嵩に対し2〜5g/Lの割合で加えてなり、
前記パラジウム含有1次スラリーが、前記パラジウム含有1次混合物に、酸化バリウム、酸化ランタン、酢酸及び水からなる溶液を混合してなり、
前記パラジウム含有2次スラリーが、前記パラジウム含有1次スラリーに、(LaCe)(FeCo)O 3 と(LaSr)(FeCo)O 3 とから選ばれた一つを前記セラミックモノリス担体の見掛け嵩に対し15〜25g/Lの割合で加えてなり、
前記第2触媒スラリーが、前記パラジウム含有2次スラリーを、ミリングして粒子の大きさ7μm以下のものが全体粒子の90%以上となるように微粉化したものである、
ことを特徴とする2重層コーティング構造のパラジウム三元触媒の製造方法。
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KR10-2003-0035951A KR100527943B1 (ko) | 2003-06-04 | 2003-06-04 | 2중층 코팅구조의 팔라듐 삼원촉매 제조방법 |
KR2003-035951 | 2003-06-04 |
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JP2004358463A JP2004358463A (ja) | 2004-12-24 |
JP4725034B2 true JP4725034B2 (ja) | 2011-07-13 |
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US (1) | US7407911B2 (ja) |
JP (1) | JP4725034B2 (ja) |
KR (1) | KR100527943B1 (ja) |
CN (1) | CN1287894C (ja) |
DE (1) | DE102004025898B4 (ja) |
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CN100364662C (zh) * | 2005-08-29 | 2008-01-30 | 浙江大学 | 稀土复合多孔氧化铝负载Pd催化剂的制备方法 |
CN1799689B (zh) * | 2006-01-13 | 2014-11-05 | 四川大学 | 密偶催化剂 |
KR100781670B1 (ko) * | 2006-08-16 | 2007-12-03 | 희성촉매 주식회사 | 극소량의 로듐 또는 로듐을 포함하지 않는 내연기관배기가스 정화용 촉매 |
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US7550124B2 (en) * | 2006-08-21 | 2009-06-23 | Basf Catalysts Llc | Layered catalyst composite |
WO2008090991A1 (ja) * | 2007-01-26 | 2008-07-31 | Cataler Corporation | 排ガス浄化用触媒 |
US8007750B2 (en) | 2007-07-19 | 2011-08-30 | Basf Corporation | Multilayered catalyst compositions |
US7922988B2 (en) * | 2007-08-09 | 2011-04-12 | Michel Deeba | Multilayered catalyst compositions |
US7622096B2 (en) * | 2007-08-09 | 2009-11-24 | Basf Catalysts Llc | Multilayered catalyst compositions |
US8038951B2 (en) | 2007-08-09 | 2011-10-18 | Basf Corporation | Catalyst compositions |
US7879755B2 (en) * | 2007-08-09 | 2011-02-01 | Basf Corporation | Catalyst compositions |
US20090175773A1 (en) * | 2008-01-08 | 2009-07-09 | Chen Shau-Lin F | Multilayered Catalyst Compositions |
JPWO2010008073A1 (ja) * | 2008-07-17 | 2012-01-05 | 株式会社キャタラー | 排ガス浄化用触媒 |
US7981390B2 (en) * | 2008-12-23 | 2011-07-19 | Basf Corporation | Small engine palladium catalyst article and method of making |
US8409518B2 (en) * | 2009-03-16 | 2013-04-02 | GM Global Technology Operations LLC | Sulfur tolerant perovskite supported catalysts |
US8940242B2 (en) * | 2009-04-17 | 2015-01-27 | Basf Corporation | Multi-zoned catalyst compositions |
WO2012029050A1 (en) * | 2010-09-02 | 2012-03-08 | Basf Se | Catalyst for gasoline lean burn engines with improved no oxidation activity |
US9242242B2 (en) | 2010-09-02 | 2016-01-26 | Basf Se | Catalyst for gasoline lean burn engines with improved NO oxidation activity |
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JP5578369B2 (ja) * | 2011-06-24 | 2014-08-27 | トヨタ自動車株式会社 | 排ガス浄化用触媒 |
JP5576420B2 (ja) * | 2012-03-21 | 2014-08-20 | トヨタ自動車株式会社 | 排ガス浄化触媒 |
WO2015017516A2 (en) * | 2013-07-30 | 2015-02-05 | Johnson Matthey Public Limited Company | Ammonia slip catalyst |
US9463447B2 (en) * | 2014-01-29 | 2016-10-11 | Ford Global Technologies, Llc | Hydrocarbon trap with increased zeolite loading and improved adsorption capacity |
JP6712272B2 (ja) * | 2014-12-19 | 2020-06-17 | ジョンソン、マッセイ、パブリック、リミテッド、カンパニーJohnson Matthey Public Limited Company | 触媒製造方法 |
CN104857974A (zh) * | 2015-05-27 | 2015-08-26 | 华东理工大学 | 一种用于汽车尾气净化的单钯催化剂及制备方法 |
CN107308952A (zh) * | 2016-10-13 | 2017-11-03 | 南京德普瑞克催化器有限公司 | 一种满足国四标准的新型摩托车催化剂制备方法 |
WO2019075154A1 (en) * | 2017-10-12 | 2019-04-18 | Johnson Matthey Public Limited Company | TWC CATALYSTS FOR FUEL EXHAUST GAS APPLICATIONS WITH ENHANCED THERMAL DURABILITY |
RU2756178C2 (ru) * | 2019-12-06 | 2021-09-28 | Федеральное государственное автономное образовательное учреждение высшего образования "Уральский федеральный университет имени первого Президента России Б.Н. Ельцина" | Способ приготовления автомобильного трехмаршрутного катализатора |
CN111135821A (zh) * | 2019-12-17 | 2020-05-12 | 安徽元琛环保科技股份有限公司 | 一种自热式涂覆型低温脱硝催化剂及其制备方法 |
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DE19854794A1 (de) * | 1998-11-27 | 2000-05-31 | Degussa | Katalysator für die Reinigung der Abgase eines Dieselmotors |
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US7022646B2 (en) * | 2003-01-31 | 2006-04-04 | Engelhard Corporation | Layered catalyst composite |
KR100527943B1 (ko) * | 2003-06-04 | 2005-11-09 | 현대자동차주식회사 | 2중층 코팅구조의 팔라듐 삼원촉매 제조방법 |
EP1743696A4 (en) * | 2004-03-30 | 2009-09-02 | Cataler Corp | CLARIFICATION CATALYST OF EXHAUST GAS |
-
2003
- 2003-06-04 KR KR10-2003-0035951A patent/KR100527943B1/ko active IP Right Grant
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2004
- 2004-05-19 JP JP2004148759A patent/JP4725034B2/ja not_active Expired - Fee Related
- 2004-05-27 DE DE102004025898A patent/DE102004025898B4/de not_active Expired - Fee Related
- 2004-06-04 US US10/862,147 patent/US7407911B2/en not_active Expired - Fee Related
- 2004-06-04 CN CNB2004100429583A patent/CN1287894C/zh not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
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US20040223897A1 (en) | 2004-11-11 |
US7407911B2 (en) | 2008-08-05 |
JP2004358463A (ja) | 2004-12-24 |
DE102004025898B4 (de) | 2009-02-12 |
DE102004025898A1 (de) | 2004-12-30 |
KR20040105097A (ko) | 2004-12-14 |
KR100527943B1 (ko) | 2005-11-09 |
CN1287894C (zh) | 2006-12-06 |
CN1572367A (zh) | 2005-02-02 |
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