Self-reactivating type denitrating method
US5080876A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Apr 20, 1990 |
| Grant date | Jan 14, 1992 |
| Priority date | — |
| Expiry date | Apr 20, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02C20/10
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A self-reactivating denitrating method and equipment in which the exhaust gas from the combustor flows and goes through an adsorbing catalyst tower filled with Cu(II) exchangeable high silica zeolite at a temperature of normal to 750.degree. C. to let NOx contained in the exhaust gas be adsorbed in the zeolite and decomposed into N.sub.2 and O.sub.2 resulting in achievement of cleaning the exhaust gas and then the zeolite saturated with NOx is put in touch countercurrently with air for combustion to let the adsorbed NOx be desorbed to reactivate Cu(II)exchangeable high silica zeolite and, at the same time, the air for combustion containing the adsorbed NOx is sent into the furnace of the combustor to decompose a part of NOx into N.sub.2 and O.sub.2 under an interfurnace combustion atmosphere.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.