JP7323520B2 - Scr触媒 - Google Patents
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- JP7323520B2 JP7323520B2 JP2020526413A JP2020526413A JP7323520B2 JP 7323520 B2 JP7323520 B2 JP 7323520B2 JP 2020526413 A JP2020526413 A JP 2020526413A JP 2020526413 A JP2020526413 A JP 2020526413A JP 7323520 B2 JP7323520 B2 JP 7323520B2
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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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- B01J23/16—Catalysts comprising metals or metal oxides or hydroxides, not provided for in group B01J21/00 of arsenic, antimony, bismuth, vanadium, niobium, tantalum, polonium, chromium, molybdenum, tungsten, manganese, technetium or rhenium
- B01J23/20—Vanadium, niobium or tantalum
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- 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
- B01D53/9418—Processes characterised by a specific catalyst for removing nitrogen oxides by selective catalytic reduction [SCR] using a reducing agent in a lean exhaust gas
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- B01J21/00—Catalysts comprising the elements, oxides, or hydroxides of magnesium, boron, aluminium, carbon, silicon, titanium, zirconium, or hafnium
- B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
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- B01J21/06—Silicon, titanium, zirconium or hafnium; Oxides or hydroxides thereof
- B01J21/063—Titanium; Oxides or hydroxides thereof
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- B01J37/0009—Use of binding agents; Moulding; Pressing; Powdering; Granulating; Addition of materials ameliorating the mechanical properties of the product catalyst
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- 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
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- F01N3/24—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 constructional aspects of converting apparatus
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- F01N3/2882—Catalytic reactors combined or associated with other devices, e.g. exhaust silencers or other exhaust purification devices
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- B01D2255/20723—Vanadium
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- B01D2258/012—Diesel engines and lean burn gasoline engines
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- 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
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- F01N2370/00—Selection of materials for exhaust purification
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- F01N2610/00—Adding substances to exhaust gases
- F01N2610/02—Adding substances to exhaust gases the substance being ammonia or urea
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- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
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- Biomedical Technology (AREA)
- Environmental & Geological Engineering (AREA)
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- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Catalysts (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
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Description
NH3+NO+1/4O2→N2+3/2H2O (I)
及び式(II)によるいわゆる「fast SCR反応」
NH3+1/2NO+1/2NO2→N2+3/2H2O (II)
は、SCR反応の重要な反応経路として認識された。
2~6重量%の量の少なくとも1つのバナジウムの酸化物と、
2~4重量%の量の少なくとも1つのセリウムの酸化物と、
1~7重量%の量の少なくとも1つのニオブの酸化物と、
合計100重量%となるように測定された量の少なくとも1つのチタンの酸化物と、を含有する、
触媒に関する。
2~6重量%の量の少なくとも1つのバナジウムの酸化物と、
0.001~2重量%の量のタングステンの少なくとも1つの酸化物と、
2~4重量%の量の少なくとも1つのセリウムの酸化物と、
1~7重量%の量の少なくとも1つのニオブの酸化物と、
合計100重量%となるように測定された量の少なくとも1つのチタンの酸化物と、
を含有する。
2~6重量%の量の少なくとも1つのバナジウムの酸化物と、
0.5~2重量%の量の少なくとも1つのタングステンの酸化物と、
2~4重量%の量の少なくとも1つのセリウムの酸化物と、
1~7重量%の量の少なくとも1つのニオブの酸化物と、
合計100重量%となるように測定された量の少なくとも1つのチタンの酸化物と、
を含有する。
窒素酸化物を含有する前記排気ガスに還元剤を添加する工程と、
窒素酸化物を含有する排気ガス及び還元剤から得られた混合物を、本発明による触媒に通す工程と、を含む、方法に関する。
ディーゼル排気ガスを処理するための排気ガス浄化システムであって、排気ガスの流れ方向に、
酸化触媒、
ディーゼル粒子フィルタ、及び
本発明による触媒
又は
酸化触媒、及び
本発明による触媒がコーティングとして存在するディーゼル粒子フィルタ
を含む、排気ガス浄化システムに関する。
a)5重量%の二酸化ケイ素でドープされたアナターゼ型の市販の二酸化チタンを水中に分散させた後、二酸化バナジウム(VO2)、三酸化タングステン(WO3)、二酸化セリウム(CeO2)、及びニオブシュウ酸アンモニウムを、85.98重量%のTiO2、4.53重量%のSiO2、3.75重量%のV2O5、1.00重量%のWO3、2.00重量%のCeO2、及び2.75重量%のNb2O5の組成の触媒を得る量で添加した。混合物を激しく撹拌し、次いで市販の撹拌ビーズミルで粉砕した。
a)5重量%の二酸化ケイ素で安定化されたアナターゼ型の市販の二酸化チタンを水中に分散させた後、二酸化バナジウム(VO2)、二酸化セリウム(CeO2)、及びニオブシュウ酸アンモニウムを、86.93重量%のTiO2、4.58重量%のSiO2、3.75重量%のV2O5、2.00重量%のCeO2、及び2.75重量%のNb2O5の組成の触媒を得る量で添加した。混合物を激しく撹拌し、次いで市販の撹拌ビーズミルで粉砕した。
a)5重量%の二酸化ケイ素で安定化されたアナターゼ型の市販の二酸化チタンを水中に分散させた後、二酸化バナジウム(VO2)、及び三酸化タングステン(WO3)を、90.49重量%のTiO2、4.76重量%のSiO2、3.75重量%のV2O5、1.00重量%のWO3の組成の触媒を得る量で添加した。混合物を激しく撹拌し、次いで市販の撹拌ビーズミルで粉砕した。
a)5重量%の二酸化ケイ素で安定化されたアナターゼ型の市販の二酸化チタンを水中に分散させた後、二酸化バナジウム(VO2)、三酸化タングステン(WO3)、及び二酸化セリウム(CeO2)を、88.59重量%のTiO2、4.66重量%のSiO2、3.75重量%のV2O5、1.00重量%のWO3、及び2.00重量%のCeO2の組成の触媒を得る量で添加した。混合物を激しく撹拌し、次いで市販の撹拌ビーズミルで粉砕した。
a)5重量%の二酸化ケイ素で安定化されたアナターゼ型の市販の二酸化チタンを水中に分散させた後、二酸化バナジウム(VO2)、三酸化タングステン(WO3)、及びニオブシュウ酸アンモニウムを、87.88重量%のTiO2、4.63重量%のSiO2、3.75重量%のV2O5、1.00重量%のWO3、及び2.75重量%のNb2O5の組成の触媒を得る量で添加した。混合物を激しく撹拌し、次いで市販の撹拌ビーズミルで粉砕した。
a)アナターゼ型の市販の二酸化チタンを水中に分散させた後、二酸化バナジウム(VO2)、三酸化タングステン(WO3)、二酸化セリウム(CeO2)、及びニオブシュウ酸アンモニウムを、90.50重量%のTiO2、3.75重量%のV2O5、1.00重量%のWO3、2.00重量%のCeO2、及び2.75重量%のNb2O5の組成の触媒を得る量で添加した。混合物を激しく撹拌し、次いで市販の撹拌ビーズミルで粉砕した。
a)5重量%の二酸化ケイ素で安定化されたアナターゼ型の市販の二酸化チタンを水中に分散させた後、二酸化バナジウム(VO2)、三酸化タングステン(WO3)、二酸化セリウム(CeO2)、及びニオブシュウ酸アンモニウムを、86.45重量%のTiO2、4.55重量%のSiO2、3.75重量%のV2O5、0.50重量%のWO3、2.00重量%のCeO2、及び2.75重量%のNb2O5の組成の触媒を得る量で添加した。混合物を激しく撹拌し、次いで市販の撹拌ビーズミルで粉砕した。
a)5重量%の二酸化ケイ素で安定化されたアナターゼ型の市販の二酸化チタンを水中に分散させた後、二酸化バナジウム(VO2)、三酸化タングステン(WO3)、二酸化セリウム(CeO2)、及びニオブシュウ酸アンモニウムを、85.03重量%のTiO2、4.48重量%のSiO2、3.75重量%のV2O5、2.00重量%のWO3、2.00重量%のCeO2、及び2.75重量%のNb2O5の組成の触媒を得る量で添加した。混合物を激しく撹拌し、次いで市販の撹拌ビーズミルで粉砕した。
a)5重量%の二酸化ケイ素で安定化されたアナターゼ型の市販の二酸化チタンを水中に分散させた後、二酸化バナジウム(VO2)、三酸化タングステン(WO3)、二酸化セリウム(CeO2)、及びニオブシュウ酸アンモニウムを、84.08重量%のTiO2、4.43重量%のSiO2、3.75重量%のV2O5、1.00重量%のWO3、4.00重量%のCeO2、及び2.75重量%のNb2O5の組成の触媒を得る量で添加した。混合物を激しく撹拌し、次いで市販の撹拌ビーズミルで粉砕した。
a)5重量%の二酸化ケイ素で安定化されたアナターゼ型の市販の二酸化チタンを水中に分散させた後、二酸化バナジウム(VO2)、三酸化タングステン(WO3)、二酸化セリウム(CeO2)、及びニオブシュウ酸アンモニウムを、84.79重量%のTiO2、4.46重量%のSiO2、3.75重量%のV2O5、1.00重量%のWO3、2.00重量%のCeO2、及び4.00重量%のNb2O5の組成の触媒を得る量で添加した。混合物を激しく撹拌し、次いで市販の撹拌ビーズミルで粉砕した。
a)5重量%の二酸化ケイ素で安定化されたアナターゼ型の市販の二酸化チタンを水中に分散させた後、二酸化バナジウム(VO2)、三酸化タングステン(WO3)、二酸化セリウム(CeO2)、及びニオブシュウ酸アンモニウムを、81.94重量%のTiO2、4.31重量%のSiO2、3.75重量%のV2O5、1.00重量%のWO3、2.00重量%のCeO2、及び7.00重量%のNb2O5の組成の触媒を得る量で添加した。混合物を激しく撹拌し、次いで市販の撹拌ビーズミルで粉砕した。
上記の実施例及び比較例に従って調製された触媒及び比較触媒のNO変換率を、石英ガラス反応器において決定した。L=3インチ及びD=1インチを有するドリルコアを、定常状態条件下、200~400℃で試験した。試験は、試験室モデルガス系において、以下の条件下で実施された。
Claims (9)
- 触媒であって、各場合において、前記触媒の総重量に基づいて、V2O5、CeO2、Nb2O5 、又はSiO 2 として計算される、
2~6重量%の量の少なくとも1つのバナジウムの酸化物と、
2~4重量%の量の少なくとも1つのセリウムの酸化物と、
1~7重量%の量の少なくとも1つのニオブの酸化物と、
2~7重量%の量の少なくとも1つのケイ素の酸化物と、を含有し、
任意に、触媒の総重量に基づいて、WO 3 として計算される、0.001~2重量%のタングステンを含有し、
任意に、触媒の総重量に基づいて、MoO 3 、Sb 2 O 5 、ZrO 2 、Ta 2 O 5 又はHfO 2 として計算される、前記酸化物の合計量が0.5~20重量%で、少なくとも1つのモリブデン、アンチモン、ジルコニウム、タンタル、及び/又はハフニウムの酸化物を含有し、
更に、前記触媒の総重量に基づいて、TiO 2 として計算される、合計100重量%となるように測定された量の少なくとも1つのチタンの酸化物を含有し、
前記触媒は排気ガスから窒素酸化物を除去するためのSCR触媒であり、
単層であるか、又は担体の一部として存在する、触媒。 - WO3として計算される、0.001~2重量%のタングステンを更に含有することを特徴とする、請求項1に記載の触媒。
- 少なくとも1つのモリブデン、アンチモン、ジルコニウム、タンタル、及び/又はハフニウムの酸化物を含有することを特徴とする、請求項1又は2に記載の触媒。
- 3.75~6重量%の量の前記少なくとも1つのバナジウムの酸化物を含有することを特徴とする、請求項1~3のいずれか一項に記載の触媒。
- 前記触媒の総重量に基づいて、MoO3、Sb2O5、ZrO2、Ta2O5又はHfO2として計算される、前記酸化物の合計量が0.5~20重量%で、少なくとも1つのモリブデン、アンチモン、ジルコニウム、タンタル、及び/又はハフニウムの酸化物を含有することを特徴とする、請求項1~4のいずれか一項に記載の触媒。
- 担体上にコーティングの形態で存在することを特徴とする、請求項1~5のいずれか一項に記載の触媒。
- 担体の一部として存在することを特徴とする、請求項1~6のいずれか一項に記載の触媒。
- リーンバーン内燃機関の排気ガス中の窒素酸化物の還元方法であって、
窒素酸化物を含有する前記排気ガスに還元剤を添加する工程と、
窒素酸化物及び還元剤を含有する、得られた排気ガス混合物を、請求項1~7のいずれか一項に記載の触媒に通す工程と、
を含む、方法。 - ディーゼル排気ガスを処理するための排気ガス浄化システムであって、
酸化触媒、
ディーゼル粒子フィルタ、及び
請求項1~6のいずれか一項に記載の触媒、
又は
酸化触媒、及び
請求項1~6のいずれか一項に記載の触媒がコーティングとして存在するディーゼル粒子フィルタ
を含む、排気ガス浄化システム。
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US11492945B2 (en) | 2022-11-08 |
WO2019096786A1 (de) | 2019-05-23 |
US20230038263A1 (en) | 2023-02-09 |
BR112020009687B1 (pt) | 2023-04-11 |
US20200362740A1 (en) | 2020-11-19 |
EP3482824A1 (de) | 2019-05-15 |
BR112020009687A2 (pt) | 2020-11-10 |
KR20200086342A (ko) | 2020-07-16 |
JP2021502893A (ja) | 2021-02-04 |
CA3082500A1 (en) | 2019-05-23 |
CN111356525B (zh) | 2023-09-15 |
EP3710157A1 (de) | 2020-09-23 |
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