Exhaust gas purification catalyst
US-2021277814-A1 · Sep 9, 2021 · US
Exhaust gas purification device
US11759769B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11759769-B2 |
| Application number | US-202117495881-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 7, 2021 |
| Priority date | Oct 19, 2020 |
| Publication date | Sep 19, 2023 |
| Grant date | Sep 19, 2023 |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
Provided is an exhaust gas purification device that allows improving an exhaust gas purification performance. An exhaust gas purification device of the present disclosure includes a substrate and a catalyst layer disposed on the substrate. The catalyst layer contains a porous carrier, a catalytic metal that is supported by the porous carrier and belongs to platinum group, an alkaline earth metal supported by the porous carrier, and an alkaline earth metal not supported by the porous carrier. At least a part of the alkaline earth metal supported by the porous carrier is supported inside the porous carrier.
First claim
Opening claim text (preview).
What is claimed is: 1. An exhaust gas purification device comprising: a substrate; and a catalyst layer disposed on the substrate, wherein the catalyst layer contains a porous carrier, a catalytic metal that is supported by the porous carrier and belongs to platinum group, a first group of an alkaline earth metal supported by the porous carrier, and a second group of an alkaline earth metal not supported by the porous carrier, and wherein at least a part of the first group of the alkaline earth metal supported by the porous carrier is supported inside the porous carrier; wherein the catalyst layer contains the first group of the alkaline earth metal supported by the porous carrier as a sulfate of the first group of the alkaline earth metal supported by the porous carrier, and contains the second group of the alkaline earth metal not supported by the porous carrier as a sulfate of the second group of the alkaline earth metal not supported by the porous carrier; wherein each of the sulfates of the first and second groups of the alkaline earth metals is a sulfate of Ba; wherein a weight ratio of the first group of the sulfate of the alkaline earth metal supported by the porous carrier relative to a total weight of the porous carrier, the catalytic metal, and the sulfate of the first group of the alkaline earth metal supported by the porous carrier is in a range of 7 weight % or more and 11 weight % or less, wherein a proportion of the sulfate supported inside the porous carrier in the sulfate of the first group of the alkaline earth metal supported by the porous carrier is in a range of 70 weight % or more, and wherein a total weight of the sulfate of the first group of the alkaline earth metal supported by the porous carrier and the sulfate of the second group of the alkaline earth metal not supported by the porous carrier is four times or more of a weight of the catalytic metal.
Assignees
Inventors
Classifications
Nanoparticles · CPC title
Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional [3D] monoliths · CPC title
- B01J35/613Primary
10-100 m2/g · CPC title
- B01J27/053Primary
Sulfates · CPC title
- B01J23/58Primary
with alkali- or alkaline earth metals · CPC title
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Frequently asked questions
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- What does patent US11759769B2 cover?
- Provided is an exhaust gas purification device that allows improving an exhaust gas purification performance. An exhaust gas purification device of the present disclosure includes a substrate and a catalyst layer disposed on the substrate. The catalyst layer contains a porous carrier, a catalytic metal that is supported by the porous carrier and belongs to platinum group, an alkaline earth meta…
- Who is the assignee on this patent?
- Chinzei Isao, Nakahigashi Seiji, Tojo Takumi, and 9 more
- What technology area does this patent fall under?
- Primary CPC classification B01J35/613. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Sep 19 2023 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 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).