Exhaust gas oxidation catalyst for compressed natural gas combustion system
US-9931615-B2 · Apr 3, 2018 · US
Oxidation catalyst for compressed natural gas combustion system exhaust gas
US10751701B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-10751701-B2 |
| Application number | US-201616064269-A |
| Country | US |
| Kind code | B2 |
| Filing date | Dec 16, 2016 |
| Priority date | Dec 23, 2015 |
| Publication date | Aug 25, 2020 |
| Grant date | Aug 25, 2020 |
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Abstract
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The present invention provides a catalyst composition for inhibiting the inactivation of a catalyst for purification of compressed natural gas combustion system exhaust gas on which a noble metal component comprising platinum and palladium is supported. An oxidation catalyst, for a compressed natural gas vehicle or static combustion system exhaust gas, in which a first alumina impregnated with platinum, a second alumina impregnated with palladium, and a ceria component are supported on a ceramic support, has a barium cocatalyst supported on the first alumina, thereby greatly inhibiting inactivation of a CNG lean burn engine catalyst.
First claim
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The invention claimed is: 1. A catalyst for improving oxidation activity on methane from an exhaust gas from a compressed natural gas vehicle or static combustion system in excess air consisting essentially of a platinum-impregnated first alumina, a palladium-impregnated second alumina and a ceria component loaded on a ceramic support and the first alumina is further impregnated with a barium cocatalyst, wherein the barium cocatalyst is added in an amount of 1 to 10 wt % based on an amount of platinum. 2. The catalyst of claim 1 , wherein a weight ratio of platinum and palladium impregnated respectively on the first alumina and the second alumina is 1:1 to 1:10. 3. A catalyst for improving oxidation activity on methane from an exhaust gas from a compressed natural gas vehicle or static combustion system in excess air comprising a platinum-impregnated first alumina, a palladium-impregnated second alumina and a ceria component loaded on a ceramic support, wherein the platinum-impregnated first alumina is further impregnated with a barium cocatalyst, wherein the barium cocatalyst is added in an amount of 1 to 10 wt % based on an amount of platinum, and wherein the palladium-impregnated second alumina is not impregnated with a barium cocatalyst. 4. The catalyst of claim 1 , wherein the catalyst consists of a platinum-impregnated first alumina, a palladium-impregnated second alumina and a ceria component loaded on a ceramic support and the first alumina is further impregnated with a barium cocatalyst, wherein the barium cocatalyst is added in an amount of 1 to 10 wt % based on an amount of platinum. 5. A method for oxidation of methane present in an exhaust gas from a compressed natural gas vehicle or static combustion system in excess air, comprising contacting the exhaust gas from a compressed natural gas vehicle or static combustion system in excess air with the catalyst of claim 1 , thereby oxidizing methane present in the exhaust gas from a compressed natural gas vehicle or static combustion system in excess air. 6. A method for oxidation of methane present in an exhaust gas from a compressed natural gas vehicle or static combustion system in excess air, comprising contacting the exhaust gas from a compressed natural gas vehicle or static combustion system in excess air with the catalyst of claim 3 , thereby oxidizing methane present in the exhaust gas from a compressed natural gas vehicle or static combustion system in excess air. 7. A method for oxidation of methane present in an exhaust gas from a compressed natural gas vehicle or static combustion system in excess air, comprising contacting the exhaust gas from a compressed natural gas vehicle or static combustion system in excess air with the catalyst of claim 4 , thereby oxidizing methane present in the exhaust gas from a compressed natural gas vehicle or static combustion system in excess air.
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- What does patent US10751701B2 cover?
- The present invention provides a catalyst composition for inhibiting the inactivation of a catalyst for purification of compressed natural gas combustion system exhaust gas on which a noble metal component comprising platinum and palladium is supported. An oxidation catalyst, for a compressed natural gas vehicle or static combustion system exhaust gas, in which a first alumina impregnated with …
- Who is the assignee on this patent?
- Heesung Catalysts Corp
- What technology area does this patent fall under?
- Primary CPC classification B01J21/04. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Aug 25 2020 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 1 related publication on this page (citations in our corpus or others sharing the same primary CPC).