Method for decreasing sulfuric acid and sulfuric anhydride present in combustion exhaust gas
US6245308A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1999 |
| Grant date | Jun 12, 2001 |
| Priority date | — |
| Expiry date | Mar 31, 2019 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D53/50
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
This invention relates to a method for decreasing sulfuric acid and sulfuric anhydride present in combustion exhaust gas which comprises adding an SO.sub.3 -decreasing agent (hydrogen gas) to combustion exhaust gas and thereby reducing sulfuric acid (H.sub.2 SO.sub.4) and sulfuric anhydride (SO.sub.3) present in the combustion exhaust gas, as well as a combustion exhaust gas flow system therefor. Thus, this invention provides a method for decreasing sulfuric acid and sulfuric anhydride present in combustion gas which can prevent the occurrence of troubles (e.g., low-temperature corrosion and ash deposition) arising from H.sub.2 SO.sub.4 and S.sub.3 contained in combustion gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.