Method of suppressing increase in SO2 oxidation rate of NOx removal catalyst
US8722559B2 · kind B2 · utility
2Cited by
2References
11Claims
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Key dates
| Filing date | Jul 23, 2012 |
| Grant date | May 13, 2014 |
| Priority date | — |
| Expiry date | Nov 1, 2032 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D2255/20776
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
In a NOx removal catalyst used for removing nitrogen oxide in flue gas, when a silica (Si) component as an inhibitor that causes an increase in an SO2 oxidation rate accumulates on a surface of the NOx removal catalyst, the silica component accumulating on the surface of the NOx removal catalyst is dissolved, thereby regenerating the catalyst. Accordingly, the inhibitor such as the silica component covering the surface of the NOx removal catalyst can be removed, thereby enabling to provide a catalyst without having an increase in the SO2 oxidation rate of the regenerated NOx removal catalyst.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.