Carbonaceous fuel combustion with improved desulfurization
US4191115A · kind A · utility
25Cited by
6References
39Claims
0Family size
Assignee
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Key dates
| Filing date | Jun 23, 1978 |
| Grant date | Mar 4, 1980 |
| Priority date | — |
| Expiry date | Jun 23, 1998 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF23J7/00
- WIPO fieldChemical engineering
- WIPO sectorChemistry
Abstract
Lime utilization for sulfurous oxides adsorption in fluidized combustion of carbonaceous fuels is improved by impregnation of porous lime particulates with iron oxide. The impregnation is achieved by spraying an aqueous solution of mixed iron sulfate and sulfite on the limestone before transfer to the fluidized bed combustor, whereby the iron compounds react with the limestone substrate to form iron oxide at the limestone surface. The iron oxide present in the spent limestone is found to catalyze the regeneration rate of the spent limestone in a reducing environment. Thus both the calcium and iron components may be recycled.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.