Method and exhaust system for treating nox in exhaust gas from stationary emission sources
US-2017341022-A1 · Nov 30, 2017 · US
Cu—P co-supported zeolite, and selective catalytic reduction catalyst and catalyst for exhaust gas using same
US11724249B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11724249-B2 |
| Application number | US-201917283401-A |
| Country | US |
| Kind code | B2 |
| Filing date | Oct 16, 2019 |
| Priority date | Oct 23, 2018 |
| Publication date | Aug 15, 2023 |
| Grant date | Aug 15, 2023 |
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Abstract
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Provided are a high-performance Cu—P co-supported zeolite and the like having excellent thermal endurance and catalyst performance. A Cu—P co-supported zeolite comprising at least a small pore size zeolite, and an extra-backbone copper atom and an extra-backbone phosphorus atom supported on the small pore size zeolite, wherein a silica-alumina ratio (SiO 2 /Al 2 O 3 ) is 7 or more and 20 or less, a ratio of the copper atom to a T atom (Cu/T) is 0.005 or more and 0.060 or less, a ratio of the phosphorus atom to the T atom (P/T) is 0.005 or more and 0.060 or less, and a ratio of the phosphorus atom to the copper atom (P/Cu) is 0.1 or more and 3 or less.
First claim
Opening claim text (preview).
The invention claimed is: 1. A Cu—P co-supported zeolite comprising a small pore size zeolite, and an extra framework copper atom and an extra framework phosphorus atom supported on the small pore size zeolite, wherein the small pore size zeolite has at least one framework structure of CHA in measurement by powder X-ray diffractomety, the Cu—P co-supported zeolite has a silica-alumina ratio (SiO 2 /Al 2 O 3 ) of from 7 to 20, the Cu—P co-supported zeolite has a ratio of the copper atom to a tetrahedral site in the zeolite (Cu/T) of from 0.005 to 0.060, the Cu—P co-supported zeolite has a ratio of the phosphorus atom to the T atom (P/T) of from 0.005 to 0.060, and the Cu—P co-supported zeolite has a ratio of the phosphorus atom to the copper atom (P/Cu) of from 1.0 to 1.5. 2. The Cu—P co-supported zeolite according to claim 1 , wherein the small pore size zeolite has an oxygen 8-membered ring structure. 3. The Cu—P co-supported zeolite according to claim 1 , wherein the small pore size zeolite has a crystallite size of from 10 nm to 50 nm in measurement by powder X-ray diffractometry. 4. The Cu—P co-supported zeolite according to claim 1 , wherein the small pore size zeolite has a crystallite size of from 15 nm to 100 nm in measurement by powder X-ray diffractometry. 5. The Cu—P co-supported zeolite according to claim 1 , wherein the Cu—P co-supported zeolite has an average particle size D 50 of from 0.01 μm to 20 μm. 6. A selective catalytic reduction catalyst comprising the Cu—P co-supported zeolite according to claim 1 . 7. A selective catalytic reduction catalyst formed article obtained by forming a composition comprising the Cu—P co-supported zeolite according to claim 1 into a predetermined shape. 8. A catalyst, comprising a substrate and a catalyst layer provided on at least one side of the substrate, wherein the catalyst layer comprises the Cu—P co-supported zeolite according to claim 1 .
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Compounds characterised by their crystallite size · CPC title
Metal or metal oxide crystallite size · CPC title
Nanoparticles · CPC title
X-ray diffraction · CPC title
2-50 nm · CPC title
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- What does patent US11724249B2 cover?
- Provided are a high-performance Cu—P co-supported zeolite and the like having excellent thermal endurance and catalyst performance. A Cu—P co-supported zeolite comprising at least a small pore size zeolite, and an extra-backbone copper atom and an extra-backbone phosphorus atom supported on the small pore size zeolite, wherein a silica-alumina ratio (SiO 2 /Al 2 O 3 ) is 7 or more and 20 or les…
- Who is the assignee on this patent?
- N E Chemcat Corp
- What technology area does this patent fall under?
- Primary CPC classification B01J29/763. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Aug 15 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 3 related publications on this page (citations in our corpus or others sharing the same primary CPC).