Method for purifying gas, gas purifying apparatus, and gas purifying catalyst
US8252257B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Aug 10, 2007 |
| Grant date | Aug 28, 2012 |
| Priority date | — |
| Expiry date | Sep 11, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/12
- WIPO fieldEnvironmental technology
- WIPO sectorChemistry
Abstract
This invention provides a method involving the use of a non-ammonia-based deNOx catalyst for reducing the amount of NOx in exhaust combustion gas discharged from a boiler and an internal-combustion engine, wherein NOx and CO contained in exhaust gas are allowed to selectively react to reduce and remove NOx. This method involves the use of a catalyst comprising a cerium-zirconium composite oxide with Au supported thereon or a catalyst comprising a cerium-oxide-containing porous carrier with zirconium and Au supported thereon. Use of such catalyst enables purification of NOx and CO in exhaust gas and also enables generation of hydrogen.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.