CA2485893A1 - Catalyst for purifying exhaust gases - Google Patents
Catalyst for purifying exhaust gases Download PDFInfo
- Publication number
- CA2485893A1 CA2485893A1 CA 2485893 CA2485893A CA2485893A1 CA 2485893 A1 CA2485893 A1 CA 2485893A1 CA 2485893 CA2485893 CA 2485893 CA 2485893 A CA2485893 A CA 2485893A CA 2485893 A1 CA2485893 A1 CA 2485893A1
- Authority
- CA
- Canada
- Prior art keywords
- catalytic ingredient
- catalyst
- upstream
- area
- set forth
- 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
Links
Landscapes
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Catalysts (AREA)
Abstract
A catalyst for purifying exhaust gases includes a substrate including an exhaust-gas passage, a coating layer formed on the exhaust-gas passage, and a catalytic ingredient loaded on the coating layer. A loading density of the catalytic ingredient on an upstream area discriminated from a downstream area by a predetermined length from an upstream end of the substrate is greater than a loading density of the catalytic ingredient on the downstream area. The catalytic ingredient is loaded more on the downstream area of the exhaust-gas passage than on the upstream area thereof.
Thus, it is possible to suppress the catalytic ingredient being poisoned by poisoning substances.
Thus, it is possible to suppress the catalytic ingredient being poisoned by poisoning substances.
Claims (7)
1. A catalyst for purifying exhaust gases, comprising:
a substrate comprising an exhaust-gas passage;
a coating layer formed on the exhaust-gas passage; and a catalytic ingredient loaded on the coating layer, wherein a loading density of the catalytic ingredient on a downstream area discriminated from an upstream area by a predetermined length from an upstream end of the substrate is greater than a loading density of the catalytic ingredient on the upstream area.
a substrate comprising an exhaust-gas passage;
a coating layer formed on the exhaust-gas passage; and a catalytic ingredient loaded on the coating layer, wherein a loading density of the catalytic ingredient on a downstream area discriminated from an upstream area by a predetermined length from an upstream end of the substrate is greater than a loading density of the catalytic ingredient on the upstream area.
2. The catalyst set forth in claim 1, wherein the upstream area is free from the catalytic ingredient loaded.
3. The catalyst set forth in claim 1 or 2, wherein the upstream area is free from the coating layer.
4. The catalyst set forth in any one of claims 1 through 3, wherein the predetermined length from an upstream end falls in a range of less than 30% of an overall length of the substrate.
5. The catalyst set forth in claim 4, wherein the predetermined length from an upstream end falls in a range of from 5 to 20% of an overall length of the substrate.
6. The catalyst set forth in any one of claims 1 through 3, wherein the predetermined length from an upstream end falls in a range of less than 31.5 mm.
7. The catalyst set forth in claim 6, wherein the predetermined length from an upstream end falls in a range of from 5 to 21 mm.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003-370983 | 2003-10-30 | ||
| JP2003370983A JP2005131551A (en) | 2003-10-30 | 2003-10-30 | Catalyst for purifying exhaust gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CA2485893A1 true CA2485893A1 (en) | 2005-04-30 |
| CA2485893C CA2485893C (en) | 2010-07-27 |
Family
ID=34510405
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA 2485893 Expired - Fee Related CA2485893C (en) | 2003-10-30 | 2004-10-25 | Catalyst for purifying exhaust gases |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2005131551A (en) |
| CN (1) | CN1311893C (en) |
| CA (1) | CA2485893C (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7947231B2 (en) | 2007-03-30 | 2011-05-24 | Ibiden Co., Ltd. | Honeycomb structure, method for manufacturing honeycomb structure, and exhaust gas purifying apparatus |
| US20130150236A1 (en) * | 2011-12-08 | 2013-06-13 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas purification catalyst |
| US9731275B2 (en) | 2013-01-23 | 2017-08-15 | Toyota Jidosha Kabushiki Kaisha | Catalytic converter |
| US9782723B2 (en) | 2013-04-03 | 2017-10-10 | Toyota Jidosha Kabushiki Kaisha | Catalyst converter |
| US10071365B2 (en) | 2013-01-23 | 2018-09-11 | Toyota Jidosha Kabushiki Kaisha | Catalytic converter |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4736724B2 (en) * | 2005-11-09 | 2011-07-27 | トヨタ自動車株式会社 | Exhaust gas purification device for internal combustion engine |
| EP2763785A4 (en) * | 2011-10-06 | 2015-06-24 | Mack Trucks | Diesel oxidation catalyst and method of treating engine exhaust gas |
| JP7035780B2 (en) * | 2018-05-08 | 2022-03-15 | トヨタ自動車株式会社 | Catalyst structure |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5846502A (en) * | 1996-01-16 | 1998-12-08 | Ford Global Technologies, Inc. | Mini-cascade catalyst system |
| BR9909986A (en) * | 1998-04-28 | 2000-12-26 | Engelhard Corp | Monolithic catalysts and related process for manufacturing |
| TW475027B (en) * | 2000-06-02 | 2002-02-01 | Emitec Emissionstechnologie | Catalyst carrier body with protective zone |
| LU90900B1 (en) * | 2002-03-07 | 2003-10-27 | Delphi Tech Inc | Multizone catalytic converter |
-
2003
- 2003-10-30 JP JP2003370983A patent/JP2005131551A/en active Pending
-
2004
- 2004-10-25 CA CA 2485893 patent/CA2485893C/en not_active Expired - Fee Related
- 2004-11-01 CN CNB2004100871297A patent/CN1311893C/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7947231B2 (en) | 2007-03-30 | 2011-05-24 | Ibiden Co., Ltd. | Honeycomb structure, method for manufacturing honeycomb structure, and exhaust gas purifying apparatus |
| US20130150236A1 (en) * | 2011-12-08 | 2013-06-13 | Toyota Jidosha Kabushiki Kaisha | Exhaust gas purification catalyst |
| US9731275B2 (en) | 2013-01-23 | 2017-08-15 | Toyota Jidosha Kabushiki Kaisha | Catalytic converter |
| US10071365B2 (en) | 2013-01-23 | 2018-09-11 | Toyota Jidosha Kabushiki Kaisha | Catalytic converter |
| US9782723B2 (en) | 2013-04-03 | 2017-10-10 | Toyota Jidosha Kabushiki Kaisha | Catalyst converter |
Also Published As
| Publication number | Publication date |
|---|---|
| CA2485893C (en) | 2010-07-27 |
| JP2005131551A (en) | 2005-05-26 |
| CN1311893C (en) | 2007-04-25 |
| CN1623635A (en) | 2005-06-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| MY142591A (en) | High-temperature-resistant coated fiber layer and particulate trap with the coated fiber layer | |
| US8071502B2 (en) | Exhaust gas purifying catalyst | |
| BRPI0703361B8 (en) | exhaust gas after-treatment system | |
| EP1674148A3 (en) | Exhaust gas purifying catalyst | |
| EP2042227A3 (en) | Emission treatment system and method using a scr filter | |
| WO2008036803A3 (en) | Catalysts to reduce nox in an exhaust gas stream and methods of preparation | |
| EP1900416A3 (en) | Exhaust gas catalytic conversion system | |
| EP1050670A3 (en) | Silencer | |
| ATE476246T1 (en) | DEVICE FOR CLEANING DIESEL EXHAUST GASES | |
| WO2004029561A3 (en) | Exhaust sound and emission control systems | |
| GB0600130D0 (en) | Exhaust system comprising zoned oxidation catalyst | |
| WO2006126734A3 (en) | Catalyst for purifying exhaust gases | |
| Katare et al. | Aged DOC is a net consumer of NO2: analyses of vehicle, engine-dynamometer and reactor data | |
| CA2485893A1 (en) | Catalyst for purifying exhaust gases | |
| CA2374950A1 (en) | Method and device for the reduction of nitrogen protoxide | |
| EP1270887A3 (en) | Exhaust gas purifying system | |
| EP1078678A3 (en) | Exhaust gas purifying catalyst | |
| WO2002033229A3 (en) | Heatable honeycomb body with two different coatings arranged serially in the direction of flow | |
| US20030014194A1 (en) | Method and emission control system for catalytically reducing nitrogen oxides in the exhaust gas of a combustion system | |
| US20120315195A1 (en) | Exhaust Flow Distribution Device | |
| EP1108863A3 (en) | Catalyst system for purifying exhaust gas | |
| JPH07132212A (en) | Method for purifying waste gas and catalytic converter therefor | |
| US20030101718A1 (en) | Method and device for the catalytic conversion of gaseous pollutants in the exhaust gas of combustion engines | |
| EP1697621B1 (en) | Apparatus for purifying exhaust gas | |
| EP1300193A1 (en) | Method and device for the catalytic conversion of gaseous pollutants in the exhaust gas of combustion engines |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EEER | Examination request | ||
| MKLA | Lapsed |
Effective date: 20141027 |