Thermally limited selective oxidation methods and apparatus
US6475454B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 14, 1999 |
| Grant date | Nov 5, 2002 |
| Priority date | — |
| Expiry date | Jan 14, 2019 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC01B2203/047
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method and apparatus are provided for selectively oxidizing carbon monoxide in the presence of hydrogen gas while leaving the hydrogen substantially unoxidized. This method utilizes a catalytic material, such as copper/copper oxide, silver/silver oxide, nickel/nickel oxide, and the higher and lower oxides of cerium, which in a more oxidized state is readily reduced by carbon monoxide and which in a more reduced state is readily oxidized by air. A carbon monoxide/hydrogen gas mixture and air are alternately contacted with the catalytic material, such that the carbon monoxide is selectively oxidized and the catalytic material is regenerated.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.