JP5770409B2 - 排ガス浄化装置 - Google Patents
排ガス浄化装置 Download PDFInfo
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- B01D53/9404—Removing only nitrogen compounds
- B01D53/9409—Nitrogen oxides
- B01D53/9413—Processes characterised by a specific catalyst
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- 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
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Description
<実施例1>
図1及び図2に示すように、ディーゼルエンジン12の排気管13aに、排ガス上流側から順に酸化触媒17と、選択還元型触媒11を積層したフィルタ14と、アンモニア酸化触媒18とを設けた。また選択還元型触媒11の第2触媒層11bをフィルタ14の排ガス上流側の隔壁14b表面に積層し、第1触媒層11aを第2触媒層11bの表面に積層した。更に酸化触媒17と選択還元型触媒11との間の排気管13aには尿素系液体16bを噴射する液体噴射ノズル16aを設けた。なお、酸化触媒17はアルミナに白金を担持して形成した。また、フィルタ14の担体14aをコージェライトにより多孔質に形成した。また選択還元型触媒11の第1触媒層11aを鉄−ゼオライト触媒により形成し、第2触媒層11bを鉄−アルミナ触媒により形成した。更にアンモニア酸化触媒18はアルミナに白金を担持して形成した。この排ガス浄化装置を実施例1とした。
鉄−アルミナ触媒からなる第2触媒層を用いずに、鉄−ゼオライト触媒からなる第1触媒層のみをフィルタの排ガス上流側の隔壁表面に積層したこと以外は、実施例1と同様に構成した。この排ガス浄化装置を比較例1とした。
<比較例2>
鉄−ゼオライト触媒からなる第1触媒層を用いずに、鉄−アルミナ触媒からなる第2触媒層のみをフィルタの排ガス上流側の隔壁表面に積層したこと以外は、実施例1と同様に構成した。この排ガス浄化装置を比較例1とした。
実施例1と比較例1及び2の排ガス浄化装置によるNOx低減率を、排ガス温度を変化させてそれぞれ測定した。その結果を図3に示す。図3から明らかなように、比較例1では、排ガス温度が200〜350℃でNOx低減率が75%と比較的高い値を示したが、排ガス温度が500℃以上ではNOx低減率が低く、比較例2では、排ガス温度が400℃以上でNOx低減率が65%前後と比較的高い値を示したが、排ガス温度が300℃以下ではNOx低減率が低かった。これらに対し、実施例1では、排ガス温度が150〜700℃にわたってNOx低減率が70%以上と高効率にNOxを低減できることが分った。
11a 第1触媒層
11b 第2触媒層
13 排気通路
14a 担体
14b 隔壁
14c 貫通孔
Claims (2)
- 排気通路(13)に設けられ排ガスが通過可能な多孔質に形成された第1触媒層(11a)と、前記第1触媒層(11a)の排ガス下流側の表面に積層され前記排ガスが通過可能な多孔質に形成された第2触媒層(11b)とを有する選択還元型触媒(11)を備えた排ガス浄化装置であって、
前記第1触媒層(11a)が鉄−ゼオライト触媒からなり150〜400℃の範囲内の排ガス温度で前記排ガスに含まれるNOxの60%以上を低減する触媒活性を示し、
前記第2触媒層(11b)が鉄−アルミナ触媒からなり前記第1触媒層(11a)の触媒活性を示す温度範囲より高い400〜700℃の範囲内の排ガス温度で前記排ガスに含まれるNOxの60%以上を低減する触媒活性を示し、
前記第1及び第2触媒層(11a,11b)の双方により150〜700℃の範囲内の排ガス温度で前記排ガスに含まれるNOxの70%以上を低減する触媒活性を示す
ことを特徴とする排ガス浄化装置。 - 排気通路(13)に多孔質の隔壁(14b)で仕切られ互いに平行であって前記排気通路(13)の長手方向に延びる複数の貫通孔(14c)を有する担体(14a)が設けられ、第2触媒層(11b)が排ガス上流側の前記隔壁(14b)表面に積層され、第1触媒層(11a)が前記第2触媒層(11b)の表面に積層された請求項1記載の排ガス浄化装置。
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007284810A JP5770409B2 (ja) | 2007-11-01 | 2007-11-01 | 排ガス浄化装置 |
US12/734,377 US8414837B2 (en) | 2007-11-01 | 2008-10-27 | Selective reduction catalyst |
PCT/JP2008/069401 WO2009057536A1 (ja) | 2007-11-01 | 2008-10-27 | 選択還元型触媒 |
CN2008801126870A CN101835533B (zh) | 2007-11-01 | 2008-10-27 | 选择还原型催化剂 |
EP08845386A EP2206553A4 (en) | 2007-11-01 | 2008-10-27 | CATALYST WITH SELECTIVE REDUCTION |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2007284810A JP5770409B2 (ja) | 2007-11-01 | 2007-11-01 | 排ガス浄化装置 |
Publications (3)
Publication Number | Publication Date |
---|---|
JP2009106913A JP2009106913A (ja) | 2009-05-21 |
JP2009106913A5 JP2009106913A5 (ja) | 2011-01-13 |
JP5770409B2 true JP5770409B2 (ja) | 2015-08-26 |
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JP2007284810A Active JP5770409B2 (ja) | 2007-11-01 | 2007-11-01 | 排ガス浄化装置 |
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US (1) | US8414837B2 (ja) |
EP (1) | EP2206553A4 (ja) |
JP (1) | JP5770409B2 (ja) |
CN (1) | CN101835533B (ja) |
WO (1) | WO2009057536A1 (ja) |
Families Citing this family (20)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2009262098A (ja) * | 2008-04-28 | 2009-11-12 | Ne Chemcat Corp | 選択還元触媒を用いた排気ガス浄化方法 |
US9079162B2 (en) | 2008-04-28 | 2015-07-14 | BASF SE Ludwigshafen | Fe-BEA/Fe-MFI mixed zeolite catalyst and process for the treatment of NOX in gas streams |
PL2319606T5 (pl) | 2008-11-04 | 2020-01-31 | Umicore Ag & Co. Kg | Filtr drobin zawartych w spalinach silników wysokoprężnych ze zoptymalizowanymi właściwościami ciśnienia spiętrzania |
JP5794981B2 (ja) * | 2009-05-29 | 2015-10-14 | コーニング インコーポレイテッド | 低すす堆積コーティングを有する微粒子フィルター |
JP2011012563A (ja) * | 2009-06-30 | 2011-01-20 | Toyota Industries Corp | 排気ガス浄化装置 |
PL2558691T3 (pl) * | 2010-04-14 | 2017-01-31 | Umicore Ag & Co. Kg | Filtr cząstek stałych z powłoką redukcyjno-katalityczną o polepszonych właściwościach |
US9978218B2 (en) | 2010-08-20 | 2018-05-22 | Micro-Gaming Ventures, LLC | Systems and methods for enabling remote device users to wager on micro events of games in a data network accessible gaming environment |
US9430909B2 (en) | 2014-04-08 | 2016-08-30 | Micro-Gaming Ventures, LLC | Location-based wagering via remote devices |
FR2971005A1 (fr) * | 2011-02-02 | 2012-08-03 | Peugeot Citroen Automobiles Sa | Ligne d'echappement pour moteur a combustion interne |
CN104736808A (zh) * | 2012-07-27 | 2015-06-24 | 塞尔瓦斯实验室有限公司 | 催化转换器、用于保养催化转换器的套件,以及用于保养催化转换器的方法 |
TW201438819A (zh) * | 2012-12-25 | 2014-10-16 | Nikki Universal Co Ltd | 耐矽毒性優異之排氣淨化用觸媒 |
WO2014115461A1 (ja) * | 2013-01-25 | 2014-07-31 | フタバ産業株式会社 | 排ガス浄化装置 |
GB2520776A (en) * | 2013-12-02 | 2015-06-03 | Johnson Matthey Plc | Wall-flow filter comprising catalytic washcoat |
US11783679B2 (en) | 2014-04-08 | 2023-10-10 | Micro-Gaming Ventures, LLC | Location-based wagering via remote devices |
JP6160568B2 (ja) | 2014-06-20 | 2017-07-12 | トヨタ自動車株式会社 | 排気浄化装置の劣化診断装置 |
JP6392024B2 (ja) * | 2014-08-12 | 2018-09-19 | 日野自動車株式会社 | 排気浄化装置 |
JP6278005B2 (ja) | 2015-07-06 | 2018-02-14 | トヨタ自動車株式会社 | 排気浄化装置の劣化診断装置 |
CA2996032C (en) * | 2015-08-21 | 2023-09-26 | Basf Corporation | Exhaust gas treatment catalysts |
JP6755306B2 (ja) * | 2015-09-29 | 2020-09-16 | 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 | すす触媒とscr触媒を有する触媒フィルタ |
WO2023203203A1 (en) * | 2022-04-22 | 2023-10-26 | Basf Corporation | Catalyst for the selective catalytic reduction of nox |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS61269312A (ja) | 1985-05-06 | 1986-11-28 | シ−メンス、アクチエンゲゼルシヤフト | 電子線照射マスク |
JP3763586B2 (ja) | 1991-06-13 | 2006-04-05 | 株式会社日本触媒 | 窒素酸化物の除去方法 |
US5981026A (en) | 1995-01-31 | 1999-11-09 | Emitec Gesellschaft Fuer Emissionstechnologie Mbh | Zeolite-coatable metallic foil and process for producing the metallic foil |
JP3442898B2 (ja) | 1995-03-22 | 2003-09-02 | 三菱重工業株式会社 | 脱硝触媒 |
US5688740A (en) * | 1996-04-30 | 1997-11-18 | Ard Co., Pte. Ltd. | Three-way catalyst for treating exhaust gases |
JP3302900B2 (ja) | 1997-03-13 | 2002-07-15 | 株式会社日本自動車部品総合研究所 | 内燃機関の排ガス浄化触媒装置および排ガス浄化方法 |
CN1107537C (zh) * | 2001-02-27 | 2003-05-07 | 段凤英 | 净化汽车尾气的催化剂及专用补气装置 |
DE60143944D1 (de) * | 2001-09-28 | 2011-03-10 | Sued Chemie Ag | Poröser Katalysator, Verfahren und Anordnung zur katalytischen Konversion von Abgasen |
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 |
US7229597B2 (en) | 2003-08-05 | 2007-06-12 | Basfd Catalysts Llc | Catalyzed SCR filter and emission treatment system |
CN100444957C (zh) * | 2003-12-09 | 2008-12-24 | 南化集团研究院 | 选择性催化还原脱除氮氧化物催化剂及其制备方法 |
DE102004005997A1 (de) | 2004-02-06 | 2005-09-01 | Hte Ag The High Throughput Experimentation Company | Mit Eisenoxid stabilisierter Edelmetall-Katalysator zur Entfernung von Schadstoffen aus Abgasen von Mager-Motoren |
WO2006011575A1 (ja) | 2004-07-29 | 2006-02-02 | N.E. Chemcat Corporation | 低温特性に優れる脱硝触媒 |
EP1810751A1 (de) | 2006-01-20 | 2007-07-25 | Universität Karlsruhe (TH) | Verfahren zur Herstellung eines eisenhaltigen SCR-Katalysators |
DE102006020158B4 (de) | 2006-05-02 | 2009-04-09 | Argillon Gmbh | Extrudierter Vollkatalysator sowie Verfahren zu seiner Herstellung |
-
2007
- 2007-11-01 JP JP2007284810A patent/JP5770409B2/ja active Active
-
2008
- 2008-10-27 EP EP08845386A patent/EP2206553A4/en not_active Withdrawn
- 2008-10-27 WO PCT/JP2008/069401 patent/WO2009057536A1/ja active Application Filing
- 2008-10-27 CN CN2008801126870A patent/CN101835533B/zh not_active Expired - Fee Related
- 2008-10-27 US US12/734,377 patent/US8414837B2/en not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
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JP2009106913A (ja) | 2009-05-21 |
WO2009057536A1 (ja) | 2009-05-07 |
US8414837B2 (en) | 2013-04-09 |
CN101835533B (zh) | 2013-03-27 |
CN101835533A (zh) | 2010-09-15 |
EP2206553A4 (en) | 2012-03-28 |
US20100254862A1 (en) | 2010-10-07 |
EP2206553A1 (en) | 2010-07-14 |
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