JP4416830B2 - 排ガス浄化触媒用複合酸化物とその製造方法および排ガス浄化触媒用塗料とディーゼル排ガス浄化用フィルタ - Google Patents
排ガス浄化触媒用複合酸化物とその製造方法および排ガス浄化触媒用塗料とディーゼル排ガス浄化用フィルタ Download PDFInfo
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- JP4416830B2 JP4416830B2 JP2009104566A JP2009104566A JP4416830B2 JP 4416830 B2 JP4416830 B2 JP 4416830B2 JP 2009104566 A JP2009104566 A JP 2009104566A JP 2009104566 A JP2009104566 A JP 2009104566A JP 4416830 B2 JP4416830 B2 JP 4416830B2
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- Prior art keywords
- exhaust gas
- composite oxide
- gas purification
- catalyst
- purification 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.)
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- KFZMGEQAYNKOFK-UHFFFAOYSA-N Isopropanol Chemical compound CC(C)O KFZMGEQAYNKOFK-UHFFFAOYSA-N 0.000 description 3
- 229910002651 NO3 Inorganic materials 0.000 description 3
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- NGDQQLAVJWUYSF-UHFFFAOYSA-N 4-methyl-2-phenyl-1,3-thiazole-5-sulfonyl chloride Chemical compound S1C(S(Cl)(=O)=O)=C(C)N=C1C1=CC=CC=C1 NGDQQLAVJWUYSF-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
-
- 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
- B01D53/944—Simultaneously removing carbon monoxide, hydrocarbons or carbon making use of oxidation catalysts
-
- 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
- B01J23/16—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
- B01J23/18—Arsenic, antimony or bismuth
-
- 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
- B01J35/19—Catalysts containing parts with different compositions
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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
- B01J37/0215—Coating
-
- 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
- B01J37/03—Precipitation; Co-precipitation
-
- 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
- F01N3/02—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust
- F01N3/021—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters
- F01N3/022—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous
- F01N3/0222—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for cooling, or for removing solid constituents of, exhaust by means of filters characterised by specially adapted filtering structure, e.g. honeycomb, mesh or fibrous the structure being monolithic, e.g. honeycombs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2239/00—Aspects relating to filtering material for liquid or gaseous fluids
- B01D2239/04—Additives and treatments of the filtering material
- B01D2239/0471—Surface coating material
- B01D2239/0478—Surface coating material on a layer of the filter
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2255/00—Catalysts
- B01D2255/10—Noble metals or compounds thereof
- B01D2255/102—Platinum group metals
- B01D2255/1021—Platinum
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Description
各実施例、比較例の複合酸化物を以下のようにして作製した。
Ce源として硝酸セリウム六水和物(Ce(NO3)3・6H2O)、Bi源として硝酸ビスマス五水和物(Bi(NO3)3・5H2O)を用意した。一方、R源として希土類酸化物Pr酸化物の粉末を濃硝酸溶液に溶解し、Rの硝酸溶液を用意した。
実施例1と同様にCe源として硝酸セリウム六水和物(Ce(NO3)3・6H2O)、Bi源として硝酸ビスマス五水和物(Bi(NO3)3・5H2O)を用意した。一方、R源として希土類酸化物Pr酸化物の粉末を濃硝酸溶液に溶解し、Rの硝酸溶液を用意した。
実施例1と同様にCe源として硝酸セリウム六水和物(Ce(NO3)3・6H2O)、Bi源として硝酸ビスマス五水和物(Bi(NO3)3・5H2O)を用意した。一方、R源として希土類酸化物Pr酸化物の粉末を濃硝酸溶液に溶解し、Rの硝酸溶液を用意した。
Ce源として硝酸セリウム六水和物(Ce(NO3)3・6H2O)、Bi源として硝酸ビスマス五水和物(Bi(NO3)3・5H2O)を用意した。一方、R源として希土類酸化物Pr酸化物の粉末を濃硝酸溶液に溶解し、Rの硝酸溶液を用意した。
Ce源として硝酸セリウム六水和物(Ce(NO3)3・6H2O)、Bi源として硝酸ビスマス五水和物(Bi(NO3)3・5H2O)を用意した。一方、R源として希土類酸化物Pr酸化物の粉末を濃硝酸溶液に溶解し、Rの硝酸溶液を用意した。
上記各硝酸塩とRの硝酸溶液を、Ce、Bi、Rのモル比が0.5:0.1:0.4となる配合割合で混合し、かつ混合硝酸溶液中のCe、Bi、Rの合計が0.2mol/Lとなるように水を加えて原料溶液を得た。この溶液を攪拌しながら沈澱剤として水酸化ナトリウムを添加した。その後、比較例1と同様の工程および条件でCeとBiとPrを主成分とする複合酸化物を得た。
得られた複合酸化物の耐熱性を評価するために、各複合酸化物の一部を、電気炉により空気中800℃で100時間にわたって熱処理(耐熱処理)した。
各実施例、比較例で得られた耐熱処理前の試料(800℃×2hと表示)、および上記耐熱処理後の試料(800℃×100hと表示)について、メノウ乳鉢で解粒し、粉末とした後、BET法により比表面積を求めた。測定はユアサイオニクス製の4ソーブUSを用いて行った。
各実施例、比較例で得られた試料、および上記耐熱処理後の試料について、カーボンブラックとの混合粉を作り、その中の一部を規定量分取した上、TG/DTA装置を用いてカーボンブラック燃焼温度を求めることによってPM燃焼開始温度を評価した。具体的には以下のようにした。
各実施例、比較例で得られた試料について、10Vol%の濃度のSO2ガスで流量500ml/minの環境に5時間と10時間放置させ被毒させた。その後それぞれの試料とカーボンブラックとの混合粉を作り、その中の一部を規定量分取した上、TG/DTA装置を用いてカーボンブラック燃焼温度を求めることによってPM燃焼温度を評価した。5時間被毒させた場合のPM燃焼温度と被毒前のPM燃焼温度との差を「ΔT5H−S処理」と呼び、10時間の場合を「ΔT10H−S処理」と呼ぶ。
(1)式に基づいてS被毒速度(SV)を求めた。
(2)式に基づいてS劣化率(SRd)を求めた。なお、比較例2に関しては5時間被毒処理後の触媒活性のデータがないため、(3)式でS劣化率を求めた。
実施例1〜3、比較例1〜3の複合酸化物について、添加元素モル比、比表面積、PM燃焼温度、S被毒速度、S劣化率を表1に示す。
10 エンジン側
11 大気開放側
12 エンジン側壁面
14 大気開放側壁面
30 エンジン側壁面に塗布されたPM触媒
40 大気開放側壁面に塗布された白金系触媒
Claims (6)
- Ce、Bi、R(ただしRはLa、Ceを除くランタノイドの1種以上)およびR´(ただしR´はランタノイドとアクチノイドを除く3族、4族、13族から選ばれた1種以上の元素)で構成される排ガス浄化触媒用複合酸化物。
- 前記R´がAl、Zr、Yから選ばれた元素である請求項1に記載された排ガス浄化触媒用複合酸化物。
- 前記RはPrである請求項1または2のいずれかの請求項に記載された排ガス浄化触媒用複合酸化物。
- Ceの硝酸溶液と、Biの硝酸溶液と、R(ただしRはLa、Ceを除くランタノイドの1種以上)の硝酸溶液と、R´(ただしR´はランタノイドとアクチノイドを除く3族、4族、13族から選ばれた1種以上の元素)の硝酸溶液を混合して混合液を得る工程と、水酸化アルカリ及び/又は炭酸アルカリと前記混合液を合わせて沈殿物を得る工程を含む排ガス浄化触媒用複合酸化物の製造方法。
- 請求項1乃至3の何れかの請求項に記載された排ガス浄化触媒用複合酸化物を含む排ガス浄化触媒用塗料。
- 多孔質フィルタと、前記多孔質フィルタ上に形成された、請求項1乃至3の何れかの請求項に記載された排ガス浄化触媒用複合酸化物と、無機バインダを含む排ガス浄化触媒層を有するディーゼル排ガス浄化用フィルタ。
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US9977874B2 (en) | 2011-11-07 | 2018-05-22 | Nike, Inc. | User interface for remote joint workout session |
CA2816589A1 (en) | 2010-11-05 | 2012-05-10 | Nike International Ltd. | Method and system for automated personal training |
KR20170040188A (ko) | 2014-07-29 | 2017-04-12 | 트라이바허 인두스트리 아게 | 귀금속-프리 촉매 조성물 |
CN107970911B (zh) * | 2017-12-01 | 2020-10-13 | 南京云高新型材料有限公司 | 一种环保节能高转化率稀土催化剂及其制备方法 |
JP7358157B2 (ja) * | 2019-09-27 | 2023-10-10 | 日本碍子株式会社 | 複合酸化物触媒、多孔質複合体および複合酸化物触媒の製造方法 |
US20230112861A1 (en) * | 2020-03-27 | 2023-04-13 | Kyocera Corporation | Catalyst, honeycomb structure, and exhaust gas purifier |
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FR2701471B1 (fr) | 1993-02-10 | 1995-05-24 | Rhone Poulenc Chimie | Procédé de synthèse de compositions à base d'oxydes mixtes de zirconium et de cérium, compositions ainsi obtenues et utilisations de ces dernières. |
FR2720296B1 (fr) * | 1994-05-27 | 1996-07-12 | Rhone Poulenc Chimie | Composés à base d'alumine, d'oxyde de cérium et d'oxyde de zirconium à réductibilité élevée, leur procédé de préparation et leur utilisation dans la préparation de catalyseurs. |
JP3819192B2 (ja) * | 1999-10-18 | 2006-09-06 | ダイヤニトリックス株式会社 | アクリロニトリルの製造法 |
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JP4030740B2 (ja) * | 2001-10-11 | 2008-01-09 | ダイヤニトリックス株式会社 | アンモ酸化用触媒の製造方法 |
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US20030186805A1 (en) | 2002-03-28 | 2003-10-02 | Vanderspurt Thomas Henry | Ceria-based mixed-metal oxide structure, including method of making and use |
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JP5063980B2 (ja) * | 2006-10-24 | 2012-10-31 | Dowaエレクトロニクス株式会社 | 排ガス浄化触媒用複合酸化物およびフィルター |
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JP5528040B2 (ja) * | 2008-10-03 | 2014-06-25 | Dowaエレクトロニクス株式会社 | 排ガス浄化触媒用複合酸化物とその製造方法および排ガス浄化触媒用塗料とディーゼル排ガス浄化用フィルタ |
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WO2012017718A1 (ja) | 2010-08-05 | 2012-02-09 | Dowaエレクトロニクス株式会社 | 触媒組成物の製造方法、触媒組成物、これを用いたディーゼル・パティキュレート・フィルタおよび排ガス浄化システム |
JPWO2012017718A1 (ja) * | 2010-08-05 | 2013-10-03 | Dowaエレクトロニクス株式会社 | 触媒組成物の製造方法、触媒組成物、これを用いたディーゼル・パティキュレート・フィルタおよび排ガス浄化システム |
US9114389B2 (en) | 2010-08-05 | 2015-08-25 | Dowa Electronics Materials Co., Ltd. | Method for producing catalyst composition, catalyst composition, diesel particulate filter using the same, and exhaust gas purification system |
JP5973914B2 (ja) * | 2010-08-05 | 2016-08-23 | Dowaエレクトロニクス株式会社 | 排ガス処理用触媒組成物の製造方法 |
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CN104759274A (zh) | 2015-07-08 |
KR101574553B1 (ko) | 2015-12-04 |
CN102015097A (zh) | 2011-04-13 |
WO2009131118A1 (ja) | 2009-10-29 |
EP2269730A4 (en) | 2014-07-09 |
US8304364B2 (en) | 2012-11-06 |
KR20110008083A (ko) | 2011-01-25 |
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