JP2018087572A - 自動車用触媒後処理システム - Google Patents
自動車用触媒後処理システム Download PDFInfo
- Publication number
- JP2018087572A JP2018087572A JP2017234176A JP2017234176A JP2018087572A JP 2018087572 A JP2018087572 A JP 2018087572A JP 2017234176 A JP2017234176 A JP 2017234176A JP 2017234176 A JP2017234176 A JP 2017234176A JP 2018087572 A JP2018087572 A JP 2018087572A
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- Prior art keywords
- catalyst
- doc
- oxidation catalyst
- diesel oxidation
- diesel
- 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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- 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 description 1
- HNPSIPDUKPIQMN-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Al]O[Al]=O HNPSIPDUKPIQMN-UHFFFAOYSA-N 0.000 description 1
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- MHOVAHRLVXNVSD-UHFFFAOYSA-N rhodium atom Chemical compound [Rh] MHOVAHRLVXNVSD-UHFFFAOYSA-N 0.000 description 1
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 description 1
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Abstract
Description
本発明は、触媒後処理システム、詳細にはディーゼルエンジンなどの自動車用の触媒後処理システムに関する。より詳細には、本発明は、ディーゼル酸化触媒(DOC)と、ディーゼル酸化触媒(DOC)の下流に位置する再生可能な後処理装置とを組み込んだ触媒後処理システムに関する。本発明はさらに、後処理装置の能動的な熱処理中に、ディーゼル酸化触媒(DOC)の活性を維持する方法、および能動的な熱処理事象中に、ディーゼル酸化触媒(DOC)の消失を回避する方法に関する。
精巧なエンジン管理などの工学的設計と種々の触媒後処理装置とを組み合わせることにより、乗り物からの排気物の高まる規制は満たされてきた。
3種のDOCを同一のブリックを使用して調製し、それらの全ては、PGM総充填量が同一の40gft−3であった。各DOCは、直径が10.5インチ(266.7mm)であり、長さが4インチ(101.6mm)であった。全てのDOCを、オーブンにおいて12.5時間750℃で加熱することにより従来の老化に供したため、DOCは、使用されたDOCを代表するものであった。
各ディーゼル酸化触媒の熱分析は、2200rpmで稼働する、エンジン運転とエンリッチメントとの双方のためのEUV B7燃料(7%バイオ燃料)が供給されたディーゼルエンジンからの排気ガスを通すことにより行われた。エンジンは、DOCの上流の排気管に配置された第7の噴射器が装着された、2500rpmで235kWをもたらす7リットル容量EUVI6シリンダーエンジンであった。
結果を図1〜3に示すが、これらの図は、試験されたDOCの各々について温度を時間(秒)とプロットしたものである。
Claims (17)
- ディーゼルエンジン排気ガス用の触媒後処理システムであって、ディーゼル酸化触媒(DOC)と、前記ディーゼル酸化触媒(DOC)の下流に位置させられた後処理装置とを備え、前記後処理装置は、周期的な熱処理と、前記後処理装置内に温度上昇を生じさせる手段とを必要とし、前記ディーゼル酸化触媒(DOC)は、炭化水素(HC)に対する酸化活性が該ディーゼル酸化触媒(DOC)の残部よりも高い長さ0.5〜2インチ(12.7〜50.81mm)の上流ゾーンを含む、触媒後処理システム。
- 前記上流ゾーンは、長さが0.5〜1.5インチである、請求項1に記載の触媒後処理システム。
- 前記上流ゾーンは、長さが約1インチである、請求項2に記載の触媒後処理システム。
- 前記ディーゼル酸化触媒(DOC)は、直径が4〜15インチであり、長さが2.5〜10インチである、請求項1〜3のいずれか1項に記載の触媒後処理システム。
- 前記ディーゼル酸化触媒は、PtとPdとの混合物、またはPtとPdとの合金を含む、請求項1〜4のいずれか1項に記載の触媒後処理システム。
- 前記ディーゼル酸化触媒(DOC)の前記上流ゾーンと前記残部との双方において、Pd対Ptの重量比は1:3〜5:1である、請求項5に記載の触媒後処理システム。
- 前記上流ゾーンのPGM濃度は10〜150gft−3である、請求項1〜6のいずれか1項に記載の触媒後処理システム。
- 前記後処理装置はすすフィルターである、請求項1〜7のいずれか1項に記載の触媒後処理システム。
- 前記後処理装置は選択的接触還元(SCR)用の触媒ユニットである、請求項1〜8のいずれか1項に記載の触媒後処理システム。
- 大型車両用ディーゼルエンジンをさらに構成する、請求項1〜9のいずれか1項に記載の触媒後処理システム。
- ディーゼルエンジンと、請求項1〜10のいずれか1項に記載の触媒後処理システムとを備える乗り物。
- 炭化水素(HC)に対する酸化活性がディーゼル酸化触媒(DOC)の残部よりも高い長さ0.5〜2インチ(12.7〜50.81mm)の上流ゾーンを含む前記ディーゼル酸化触媒(DOC)上に排気ガスを通すことによって、200〜375℃の排気ガス温度での、ディーゼルエンジン排気ガス触媒後処理システムにおけるディーゼル酸化触媒(DOC)の下流に位置する後処理装置の能動的熱処理中に、ディーゼル酸化触媒(DOC)の活性を維持する方法。
- 炭化水素(HC)に対する酸化活性がディーゼル酸化触媒(DOC)の残部よりも高い長さ0.5〜2インチ(12.7〜50.81mm)の上流ゾーンを含む前記DOC上に、炭化水素(HC)エンリッチ排気ガスを通すことによって、200〜375℃の排気ガス温度での、ディーゼル酸化触媒(DOC)の下流に位置する後処理装置の能動的熱処理事象中に、前記ディーゼル酸化触媒(DOC)の消失を回避する方法。
- 前記上流ゾーンは、予め触媒で均一にコーティングされたブリックの一部に第2の触媒コーティングを適用する追加の精密コーティング工程を行うことにより調製される、請求項12または13に記載の方法。
- 前記上流ゾーンは、予め触媒で均一にコーティングされたブリックの一部を含浸させることにより調製される、請求項12または13に記載の方法。
- 前記上流ゾーンは、予め触媒で均一にコーティングされたブリックの一部の触媒ウォッシュコートにより調製される、請求項12または13に記載の方法。
- 前記上流ゾーンは、予め触媒で均一にコーティングされたブリックの一部への1種以上の触媒金属を化学付着により調製される、請求項12または13に記載の方法。
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CN113784789B (zh) * | 2019-06-26 | 2023-12-12 | 庄信万丰股份有限公司 | 用于压缩点火内燃机的复合分区氧化催化剂 |
GB201914958D0 (en) | 2019-06-26 | 2019-11-27 | Johnson Matthey Plc | Composite, zoned oxidation catalyst for a compression ignition internal combustion engine |
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CN103998113A (zh) | 2014-08-20 |
EP2790814A1 (en) | 2014-10-22 |
GB201222460D0 (en) | 2013-01-30 |
EP2790814B1 (en) | 2020-10-14 |
DE102012223021B4 (de) | 2019-05-02 |
KR20140105568A (ko) | 2014-09-01 |
CN103998113B (zh) | 2017-05-03 |
GB2497669B (en) | 2015-11-18 |
JP2015508468A (ja) | 2015-03-19 |
JP2020097939A (ja) | 2020-06-25 |
GB201121468D0 (en) | 2012-01-25 |
JP6974145B2 (ja) | 2021-12-01 |
BR112014013254B1 (pt) | 2021-02-23 |
WO2013088152A1 (en) | 2013-06-20 |
BR112014013254A2 (pt) | 2017-06-13 |
JP2022176975A (ja) | 2022-11-30 |
US9341098B2 (en) | 2016-05-17 |
KR20190112178A (ko) | 2019-10-02 |
RU2617770C2 (ru) | 2017-04-26 |
DE102012223021A1 (de) | 2013-06-20 |
KR102025922B1 (ko) | 2019-11-11 |
US20130152548A1 (en) | 2013-06-20 |
BR112014013254A8 (pt) | 2017-06-13 |
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