JP2006231204A - 排ガス浄化触媒 - Google Patents
排ガス浄化触媒 Download PDFInfo
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- JP2006231204A JP2006231204A JP2005049740A JP2005049740A JP2006231204A JP 2006231204 A JP2006231204 A JP 2006231204A JP 2005049740 A JP2005049740 A JP 2005049740A JP 2005049740 A JP2005049740 A JP 2005049740A JP 2006231204 A JP2006231204 A JP 2006231204A
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- JP
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- Prior art keywords
- nox
- exhaust gas
- catalyst
- supported
- upstream
- 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.)
- Granted
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- 239000003054 catalyst Substances 0.000 title claims abstract description 71
- 238000004140 cleaning Methods 0.000 title abstract 3
- 229910052763 palladium Inorganic materials 0.000 claims abstract description 30
- 229910052697 platinum Inorganic materials 0.000 claims abstract description 30
- 239000000463 material Substances 0.000 claims abstract description 29
- 239000011232 storage material Substances 0.000 claims abstract description 13
- 229910052703 rhodium Inorganic materials 0.000 claims abstract description 11
- 238000011144 upstream manufacturing Methods 0.000 claims description 35
- 238000000746 purification Methods 0.000 claims description 27
- 239000000758 substrate Substances 0.000 claims description 23
- 229910002089 NOx Inorganic materials 0.000 claims 1
- 238000000151 deposition Methods 0.000 abstract 2
- 239000000446 fuel Substances 0.000 abstract 1
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 185
- 239000007789 gas Substances 0.000 description 50
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 40
- KDLHZDBZIXYQEI-UHFFFAOYSA-N palladium Substances [Pd] KDLHZDBZIXYQEI-UHFFFAOYSA-N 0.000 description 30
- 239000010948 rhodium Substances 0.000 description 26
- 229910000510 noble metal Inorganic materials 0.000 description 18
- MCMNRKCIXSYSNV-UHFFFAOYSA-N Zirconium dioxide Chemical compound O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 description 17
- 239000002585 base Substances 0.000 description 14
- 230000000052 comparative effect Effects 0.000 description 13
- 239000007864 aqueous solution Substances 0.000 description 11
- 238000006722 reduction reaction Methods 0.000 description 10
- 230000010757 Reduction Activity Effects 0.000 description 8
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 8
- 238000001035 drying Methods 0.000 description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 6
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 description 6
- IWOUKMZUPDVPGQ-UHFFFAOYSA-N barium nitrate Chemical compound [Ba+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O IWOUKMZUPDVPGQ-UHFFFAOYSA-N 0.000 description 6
- IIPYXGDZVMZOAP-UHFFFAOYSA-N lithium nitrate Chemical compound [Li+].[O-][N+]([O-])=O IIPYXGDZVMZOAP-UHFFFAOYSA-N 0.000 description 6
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 6
- 239000002002 slurry Substances 0.000 description 6
- 238000011156 evaluation Methods 0.000 description 5
- 239000008188 pellet Substances 0.000 description 5
- 230000001603 reducing effect Effects 0.000 description 5
- 239000000243 solution Substances 0.000 description 5
- 229910002651 NO3 Inorganic materials 0.000 description 4
- NHNBFGGVMKEFGY-UHFFFAOYSA-N Nitrate Chemical compound [O-][N+]([O-])=O NHNBFGGVMKEFGY-UHFFFAOYSA-N 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 229910052744 lithium Inorganic materials 0.000 description 4
- 238000011068 loading method Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 229910052783 alkali metal Inorganic materials 0.000 description 3
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229910052757 nitrogen Inorganic materials 0.000 description 3
- 235000010333 potassium nitrate Nutrition 0.000 description 3
- 239000004323 potassium nitrate Substances 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- -1 alkali metal salt Chemical class 0.000 description 2
- IXSUHTFXKKBBJP-UHFFFAOYSA-L azanide;platinum(2+);dinitrite Chemical compound [NH2-].[NH2-].[Pt+2].[O-]N=O.[O-]N=O IXSUHTFXKKBBJP-UHFFFAOYSA-L 0.000 description 2
- 229910052878 cordierite Inorganic materials 0.000 description 2
- 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 2
- 238000005245 sintering Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 150000001340 alkali metals Chemical class 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 229910052788 barium Inorganic materials 0.000 description 1
- DSAJWYNOEDNPEQ-UHFFFAOYSA-N barium atom Chemical compound [Ba] DSAJWYNOEDNPEQ-UHFFFAOYSA-N 0.000 description 1
- 229910052790 beryllium Inorganic materials 0.000 description 1
- ATBAMAFKBVZNFJ-UHFFFAOYSA-N beryllium atom Chemical compound [Be] ATBAMAFKBVZNFJ-UHFFFAOYSA-N 0.000 description 1
- 229910052792 caesium Inorganic materials 0.000 description 1
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- CETPSERCERDGAM-UHFFFAOYSA-N ceric oxide Chemical compound O=[Ce]=O CETPSERCERDGAM-UHFFFAOYSA-N 0.000 description 1
- 229910000422 cerium(IV) oxide Inorganic materials 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 229910052730 francium Inorganic materials 0.000 description 1
- KLMCZVJOEAUDNE-UHFFFAOYSA-N francium atom Chemical compound [Fr] KLMCZVJOEAUDNE-UHFFFAOYSA-N 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 229910052749 magnesium Inorganic materials 0.000 description 1
- 239000011777 magnesium Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- GPNDARIEYHPYAY-UHFFFAOYSA-N palladium(ii) nitrate Chemical compound [Pd+2].[O-][N+]([O-])=O.[O-][N+]([O-])=O GPNDARIEYHPYAY-UHFFFAOYSA-N 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000010970 precious metal Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 229910052701 rubidium Inorganic materials 0.000 description 1
- IGLNJRXAVVLDKE-UHFFFAOYSA-N rubidium atom Chemical compound [Rb] IGLNJRXAVVLDKE-UHFFFAOYSA-N 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000006104 solid solution Substances 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 229910052712 strontium Inorganic materials 0.000 description 1
- CIOAGBVUUVVLOB-UHFFFAOYSA-N strontium atom Chemical compound [Sr] CIOAGBVUUVVLOB-UHFFFAOYSA-N 0.000 description 1
Images
Landscapes
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Abstract
【解決手段】 本発明の排ガス浄化触媒は、担体基材と、該担体基材に形成された触媒担持層と、該触媒担持層に担持されたPt、Pd、RhおよびNOx吸蔵材と、を有する排ガス浄化触媒であって、Rhは、排ガス流の下流側に配置される前記担体基材の下流部で高濃度担持されていることを特徴とする。
【選択図】 図1
Description
担体基材として、セル密度400cpsi、壁厚150μm、直径129mm、長さ75mmのコージェライト製ハニカム担体基材(1リットル)を準備した。
担体基材として、セル密度400cpsi、壁厚150μm、直径129mm、長さ150mmのコージェライト製ハニカム担体基材(2リットル)を準備した。
上流側触媒の貴金属担持量をPt:4g/L、Pd:0g/Lに変更した他は、実施例1と同様にして、比較例2の排ガス浄化触媒を得た。
実施例1、比較例1および比較例2の排ガス浄化触媒について、吸蔵還元反応の実機評価を行った。試験結果を図1および図2に示す。なお、図1は、各排ガス浄化触媒のNOx吸蔵プロファイルを示すグラフであって、経過時間(試験時間)に対する各触媒から排出される排出ガスに含まれるNOxの濃度を示す。また、図2は、各排ガス浄化触媒のNOx浄化性能を示すグラフである。
Claims (4)
- 担体基材と、
該担体基材に形成された触媒担持層と、
該触媒担持層に担持されたPt、Pd、RhおよびNOx吸蔵材と、
を有する排ガス浄化触媒であって、
Rhは、排ガス流の下流側に配置される前記担体基材の下流部で高濃度担持されていることを特徴とする排ガス浄化触媒。 - PtおよびPdは、排ガス流の上流側に配置される前記担体基材の上流部で高濃度担持されている請求項1記載の排ガス浄化触媒。
- 前記NOx吸蔵材は、前記担体基材の上流部で高濃度担持されている請求項1記載の排ガス浄化触媒。
- 前記担体基材の上流部の容量は、前記担体基材の下流部の容量以上である請求項1記載の排ガス浄化触媒。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005049740A JP4923412B2 (ja) | 2005-02-24 | 2005-02-24 | 排ガス浄化触媒 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2005049740A JP4923412B2 (ja) | 2005-02-24 | 2005-02-24 | 排ガス浄化触媒 |
Publications (2)
Publication Number | Publication Date |
---|---|
JP2006231204A true JP2006231204A (ja) | 2006-09-07 |
JP4923412B2 JP4923412B2 (ja) | 2012-04-25 |
Family
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Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2005049740A Expired - Fee Related JP4923412B2 (ja) | 2005-02-24 | 2005-02-24 | 排ガス浄化触媒 |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP4923412B2 (ja) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008010576A1 (fr) * | 2006-07-20 | 2008-01-24 | Toyota Jidosha Kabushiki Kaisha | Catalyseur pour la purification d'un gaz d'échappement |
JP2009248057A (ja) * | 2008-04-10 | 2009-10-29 | Toyota Motor Corp | 排ガス浄化用触媒 |
JP2010179200A (ja) * | 2009-02-03 | 2010-08-19 | Toyota Motor Corp | 排ガス浄化触媒 |
JP2016112537A (ja) * | 2014-12-17 | 2016-06-23 | トヨタ自動車株式会社 | 排ガス浄化用触媒 |
WO2020153309A1 (ja) | 2019-01-22 | 2020-07-30 | 三井金属鉱業株式会社 | 排ガス浄化用触媒 |
CN111741813A (zh) * | 2018-02-21 | 2020-10-02 | 株式会社科特拉 | 排气净化催化剂装置 |
EP3730203A1 (en) | 2019-04-25 | 2020-10-28 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas purification catalyst |
Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05293376A (ja) * | 1992-04-15 | 1993-11-09 | Nissan Motor Co Ltd | 排ガス浄化用触媒及び排ガス浄化方法 |
JP2002331240A (ja) * | 2000-09-05 | 2002-11-19 | Toyota Motor Corp | 排ガス浄化用触媒及び排ガス浄化装置 |
JP2003343252A (ja) * | 2002-05-30 | 2003-12-03 | Nissan Motor Co Ltd | 排気ガス浄化システム |
JP2004016931A (ja) * | 2002-06-17 | 2004-01-22 | Nissan Motor Co Ltd | 排気ガス浄化触媒 |
JP2004124859A (ja) * | 2002-10-04 | 2004-04-22 | Nissan Motor Co Ltd | 排気ガス浄化システム |
-
2005
- 2005-02-24 JP JP2005049740A patent/JP4923412B2/ja not_active Expired - Fee Related
Patent Citations (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH05293376A (ja) * | 1992-04-15 | 1993-11-09 | Nissan Motor Co Ltd | 排ガス浄化用触媒及び排ガス浄化方法 |
JP2002331240A (ja) * | 2000-09-05 | 2002-11-19 | Toyota Motor Corp | 排ガス浄化用触媒及び排ガス浄化装置 |
JP2003343252A (ja) * | 2002-05-30 | 2003-12-03 | Nissan Motor Co Ltd | 排気ガス浄化システム |
JP2004016931A (ja) * | 2002-06-17 | 2004-01-22 | Nissan Motor Co Ltd | 排気ガス浄化触媒 |
JP2004124859A (ja) * | 2002-10-04 | 2004-04-22 | Nissan Motor Co Ltd | 排気ガス浄化システム |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2008010576A1 (fr) * | 2006-07-20 | 2008-01-24 | Toyota Jidosha Kabushiki Kaisha | Catalyseur pour la purification d'un gaz d'échappement |
US7846865B2 (en) | 2006-07-20 | 2010-12-07 | Toyota Jidosha Kabushiki Kaisha | Catalyst for purifying exhaust gas |
JP2009248057A (ja) * | 2008-04-10 | 2009-10-29 | Toyota Motor Corp | 排ガス浄化用触媒 |
JP2010179200A (ja) * | 2009-02-03 | 2010-08-19 | Toyota Motor Corp | 排ガス浄化触媒 |
JP2016112537A (ja) * | 2014-12-17 | 2016-06-23 | トヨタ自動車株式会社 | 排ガス浄化用触媒 |
CN111741813A (zh) * | 2018-02-21 | 2020-10-02 | 株式会社科特拉 | 排气净化催化剂装置 |
US11633724B2 (en) | 2018-02-21 | 2023-04-25 | Cataler Corporation | Methods for exhaust gas purification |
CN111741813B (zh) * | 2018-02-21 | 2023-08-04 | 株式会社科特拉 | 排气净化催化剂装置 |
WO2020153309A1 (ja) | 2019-01-22 | 2020-07-30 | 三井金属鉱業株式会社 | 排ガス浄化用触媒 |
EP3730203A1 (en) | 2019-04-25 | 2020-10-28 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas purification catalyst |
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