Catalytically active particle filter having a high degree of filtering efficiency
US-2024017213-A1 · Jan 18, 2024 · US
Catalytic converter
US9579633B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-9579633-B2 |
| Application number | US-201615045436-A |
| Country | US |
| Kind code | B2 |
| Filing date | Feb 17, 2016 |
| Priority date | Mar 20, 2015 |
| Publication date | Feb 28, 2017 |
| Grant date | Feb 28, 2017 |
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Abstract
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A catalytic converter with excellent OSC performance and NO x purification performance. The catalytic converter includes a substrate with a cell structure and catalyst layer. The catalyst layer includes lower and upper catalyst layers. The upper catalyst layer includes a zirconia compound support with rhodium carried thereon that contains zirconia, lanthanum oxide, and yttrium oxide; an alumina compound without rhodium carried thereon that contains alumina and lanthanum oxide; and a ceria-zirconia-based composite oxide containing ceria, zirconia, lanthanum oxide, and neodymium oxide. The lower catalyst layer includes an alumina compound support with platinum carried thereon that contains alumina and lanthanum oxide that are the same materials as those of the alumina compound of the upper catalyst layer; and a ceria-zirconia-based composite oxide without platinum carried thereon that contains ceria, zirconia, lanthanum oxide, and neodymium oxide that are the same materials as those of the ceria-zirconia-based composite oxide of the upper catalyst layer.
First claim
Opening claim text (preview).
What is claimed is: 1. A catalytic converter comprising: a substrate with a cell structure through which exhaust gas flows; and a catalyst layer formed on a cell wall surface of the substrate, wherein the catalyst layer includes a lower catalyst layer and an upper catalyst layer, the lower catalyst layer being formed on a surface of the substrate, and the upper catalyst layer being formed on a surface of the lower catalyst layer, wherein, the upper catalyst layer includes a zirconia compound support with rhodium carried thereon, the zirconia compound support containing zirconia, lanthanum oxide, and yttrium oxide, an alumina compound without a noble metal catalyst carried thereon, the alumina compound containing alumina and lanthanum oxide, and a ceria-zirconia-based composite oxide containing ceria, zirconia, lanthanum oxide, and neodymium oxide, and the lower catalyst layer includes an alumina compound support with platinum carried thereon, the alumina compound support containing alumina and lanthanum oxide that are the same materials as those of the alumina compound of the upper catalyst layer, and a ceria-zirconia-based composite oxide without a noble metal catalyst carried thereon, the ceria-zirconia-based composite oxide containing ceria, zirconia, lanthanum oxide, and neodymium oxide that are the same materials as those of the ceria-zirconia-based composite oxide of the upper catalyst layer.
Assignees
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Classifications
- B01J23/63Primary
with rare earths or actinides · CPC title
Operations & Transport · mapped topic
Operations & Transport · mapped topic
Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional [3D] monoliths · CPC title
Three zones · CPC title
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- What does patent US9579633B2 cover?
- A catalytic converter with excellent OSC performance and NO x purification performance. The catalytic converter includes a substrate with a cell structure and catalyst layer. The catalyst layer includes lower and upper catalyst layers. The upper catalyst layer includes a zirconia compound support with rhodium carried thereon that contains zirconia, lanthanum oxide, and yttrium oxide; an alumin…
- Who is the assignee on this patent?
- Toyota Motor Co Ltd
- What technology area does this patent fall under?
- Primary CPC classification B01J23/63. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Feb 28 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).