Coal combustion to produce clean low-sulfur exhaust gas
US4572085A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 6, 1985 |
| Grant date | Feb 25, 1986 |
| Priority date | — |
| Expiry date | Feb 6, 2005 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23C3/006
- WIPO fieldBasic materials chemistry
- WIPO sectorChemistry
Abstract
A process is provided for combusting sulfur-containing coal in a single step while producing an off-gas low in sulfur. The process comprises combusting finely divided coal in a furnace burner cavity in the presence of a finely divided iron oxide or iron powder and at least about 60% of the oxygen stoichiometrically required for substantially complete combustion of the coal to form a liquid iron oxysulfide phase and a turbulent atmosphere of combustion-product gases, liquid iron oxysulfide acting to scrub sulfur-containing gaseous species from the atmosphere to yield an essentially sulfur-free flue gas and a liquid iron oxysulfide slag containing substantially the sulfur originally contained in the coal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.