Method and system for the purification of exhaust gas from an internal combustion engine
US-9561468-B2 · Feb 7, 2017 · US
System for the purification of exhaust gas from an internal combustion engine
US2016354724A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2016354724-A1 |
| Application number | US-201615203913-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jul 7, 2016 |
| Priority date | Apr 27, 2012 |
| Publication date | Dec 8, 2016 |
| Grant date | — |
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Abstract
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An exhaust gas cleaning system, comprising an active regenerable particulate filter and an SCR catalyst comprising a hydrothermally microporous stable zeolite having the AEI type framework and being promoted with copper, where the zeolite is SSZ-39.
First claim
Opening claim text (preview).
What is claimed is: 1 . An exhaust gas cleaning system, comprising an active regenerable particulate filter and an SCR catalyst comprising a hydrothermally microporous stable zeolite with the AEI type framework and being promoted with copper, wherein the microporous stable zeolite of the AEI type framework is SSZ-39. 2 . The exhaust gas cleaning system of claim 1 , wherein the SCR catalyst is integrated into the particulate filter. 3 . The exhaust gas cleaning system of claim 1 , wherein the atomic copper to aluminium ratio in the zeolite is between about 0.01 and about 1. 4 . The exhaust gas cleaning system of claim 1 , wherein the atomic ratio of silicon to aluminium in the SCR catalyst is between 5 and 50 for the zeolite. 5 . The exhaust gas cleaning system of claim 1 , wherein the SCR catalyst retains 80% of the initial reduction of nitrogen oxides at 250° C. after the catalyst has been exposed to a temperature of 750° C. and a water vapour content of 100% in the exhaust gas for 13 hours. 6 . The exhaust gas cleaning system of claim 1 , wherein the SCR catalyst retains at least 80 to 90% of the initial microporosity after aging at 600° C., and at least 30 to 40% of the initial microporosity after aging at 750° C. 7 . The exhaust gas cleaning system of claim 1 , wherein the SCR catalyst is deposited on a monolithic support structure.
Assignees
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Classifications
Mounting or arrangement of exhaust sensors in or on exhaust apparatus (sensor arrangements for engine control F02D41/1439) · CPC title
to introduce other elements in the catalyst composition comprising the molecular sieve, but not specially in or on the molecular sieve itself · CPC title
Catalyst supported on particulate filters · CPC title
Copper · CPC title
Coatings comprising a zeolite · CPC title
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Frequently asked questions
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- What does patent US2016354724A1 cover?
- An exhaust gas cleaning system, comprising an active regenerable particulate filter and an SCR catalyst comprising a hydrothermally microporous stable zeolite having the AEI type framework and being promoted with copper, where the zeolite is SSZ-39.
- Who is the assignee on this patent?
- Haldor Topsoe As
- What technology area does this patent fall under?
- Primary CPC classification B01D53/9431. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Thu Dec 08 2016 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).