Acid emission reduction
US5458803A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 30, 1993 |
| Grant date | Oct 17, 1995 |
| Priority date | — |
| Expiry date | Sep 30, 2013 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB01D53/60
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
A method of reducing acid emission from a flue gas produced by combustion of a sulphur-containing fuel. A pyrolysis liquor containing a thermolabile alkaline earth metal compound is introduced into a flue containing the flue gas. The alkaline earth metal compound is able to decompose at flue gas temperature to produce an alkaline compound able to react with sulphur dioxide in the flue gas. A liquor additive to inject into a flue gas resulting from a combustion of a sulphur containing fuel to reduce the acid content of the flue gas is also described. The liquor comprises a pyrolysis liquor, initially acidic but at least partially neutralized by basic alkaline earth metal compounds. The resulting liquor contains at least one thermolabile alkaline earth metal compound able to decompose at flue gas temperature to produce an alkaline compound able to react with sulphur dioxide. A method of producing the liquor is also described.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.