Catalyst for gasoline lean burn engines with improved NO oxidation activity
US-9242242-B2 · Jan 26, 2016 · US
CO slip catalyst and method of using
US9694349B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9694349-B2 |
| Application number | US-201615000187-A |
| Country | US |
| Kind code | B2 |
| Filing date | Jan 19, 2016 |
| Priority date | Aug 28, 2013 |
| Publication date | Jul 4, 2017 |
| Grant date | Jul 4, 2017 |
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- Title
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Abstract
Official abstract text for this publication.
A CO slip catalyst, for treating an exhaust gas from a lean burn internal combustion engine, is disclosed. The CO slip catalyst comprises palladium and a ceria-containing material. The invention also includes a method for oxidizing excess CO in an exhaust gas, wherein the excess CO results from the periodic contact of an upstream catalyst under rich exhaust conditions. The method comprises contacting the excess CO in the exhaust gas with a CO slip catalyst at a temperature in the range of 100 to 700° C.
First claim
Opening claim text (preview).
We claim: 1. A CO slip catalyst for treating an exhaust gas from a lean burn internal combustion engine, where the CO slip catalyst consists essentially of palladium and a ceria-containing material. 2. The CO slip catalyst of claim 1 , wherein the ceria-containing material comprises ceria, ceria-zirconia, ceria-zirconia-alumina, and mixtures thereof. 3. The CO slip catalyst of claim 2 , wherein the ceria-containing material comprises ceria. 4. The CO slip catalyst of claim 1 , wherein the CO slip catalyst comprises 0.5 to 5 weight percent palladium. 5. The CO slip catalyst of claim 1 , wherein the CO slip catalyst is coated on a substrate. 6. The CO slip catalyst of claim 5 , wherein the substrate is a ceramic substrate or a metallic substrate.
Assignees
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Classifications
Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters · CPC title
for exhaust purification, e.g. catalytic reaction · CPC title
used in catalytic reactors · CPC title
Multiple catalysts · CPC title
Zirconium · CPC title
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Frequently asked questions
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- What does patent US9694349B2 cover?
- A CO slip catalyst, for treating an exhaust gas from a lean burn internal combustion engine, is disclosed. The CO slip catalyst comprises palladium and a ceria-containing material. The invention also includes a method for oxidizing excess CO in an exhaust gas, wherein the excess CO results from the periodic contact of an upstream catalyst under rich exhaust conditions. The method comprises cont…
- Who is the assignee on this patent?
- Johnson Matthey Plc, Johnson Matthey Plc
- What technology area does this patent fall under?
- Primary CPC classification F01N3/2803. Mapped technology areas include Mechanical Engineering.
- When was this patent published?
- Publication date Tue Jul 04 2017 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).