Carbonaceous fuel combustion with improved desulfurization

Patent · Tue Mar 04 00:00:00 EST 1980

OSTI ID:5090044

Yang, R T; Shen, M S

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.

• Assignee: Dept. of Energy
• Patent Number(s): US 4191115
• OSTI ID: 5090044
• Resource Relation: Patent File Date: Filed date 23 Jun 1978; Other Information: PAT-APPL-918,618
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL
FLUIDIZED-BED COMBUSTION
SULFUR OXIDES
ADSORPTION
AIR POLLUTION ABATEMENT
DESULFURIZATION
IRON SULFATES
LIMESTONE
CARBONACEOUS MATERIALS
CARBONATE ROCKS
CHALCOGENIDES
CHEMICAL REACTIONS
COMBUSTION
ENERGY SOURCES
FOSSIL FUELS
FUELS
IRON COMPOUNDS
MATERIALS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION ABATEMENT
ROCKS
SEDIMENTARY ROCKS
SORPTION
SULFATES
SULFUR COMPOUNDS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS
014000* - Coal
Lignite
& Peat- Combustion
010800 - Coal
Lignite
& Peat- Waste Management