Catalytic reaction process
US-2024173711-A1 · May 30, 2024 · US
Three-way catalyst having an upstream single-layer catalyst
US8968690B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-8968690-B2 |
| Application number | US-201113988706-A |
| Country | US |
| Kind code | B2 |
| Filing date | Nov 21, 2011 |
| Priority date | Nov 22, 2010 |
| Publication date | Mar 3, 2015 |
| Grant date | Mar 3, 2015 |
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Abstract
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Disclosed herein is a layered three-way catalytic system being separated in a front and a rear portion having the capability of simultaneously catalyzing the oxidation of hydrocarbons and carbon monoxide and the reduction of nitrogen oxides. Provided is a catalyst composite comprising a single front catalytic layer and two rear catalytic layers in conjunction with a substrate, where the single font layer and the rear bottom layer comprise a Pd component, the rear top layer comprises a Rh component, and the rear bottom layer is substantially free of an oxygen storage component (OSC).
First claim
Opening claim text (preview).
What is claimed is: 1. A catalyst composite for the purification of exhaust gases of a combustion engine substantially running under stoichiometric conditions comprising in sequence and in order: a front single catalytic layer on a substrate; and a rear double catalytic layer on a substrate having a 1 st (lower) catalytic layer and a 2 nd (upper) catalytic layer; wherein the 2 nd catalytic layer comprises rhodium as a PGM; wherein the front single catalytic layer and the…
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Cross-Sectional Technologies · mapped topic
Operations & Transport · mapped topic
Operations & Transport · mapped topic
Operations & Transport · mapped topic
Operations & Transport · mapped topic
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- What does patent US8968690B2 cover?
- Disclosed herein is a layered three-way catalytic system being separated in a front and a rear portion having the capability of simultaneously catalyzing the oxidation of hydrocarbons and carbon monoxide and the reduction of nitrogen oxides. Provided is a catalyst composite comprising a single front catalytic layer and two rear catalytic layers in conjunction with a substrate, where the single …
- Who is the assignee on this patent?
- Nunan John G, Klingmann Raoul, Andersen Ryan J, and 3 more
- What technology area does this patent fall under?
- Primary CPC classification B01J23/42. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Mar 03 2015 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).