Carbonaceous fuel combustion with improved desulfurization

Patent · Tue Jan 01 00:00:00 EST 1980

OSTI ID:863517

Yang, Ralph T ^[1]; Shen, Ming-shing ^[2]

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1. Middle Island, NY
2. Rocky Point, NY

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.

• Research Organization: Brookhaven National Laboratory (BNL), Upton, NY (United States)
• DOE Contract Number: EY-76-C-02-0016
• Assignee: United States of America as represented by United States (Washington, DC)
• Patent Number(s): US 4191115
• OSTI ID: 863517
• Country of Publication: United States
• Language: English

Related Subjects

carbonaceous
fuel
combustion
improved
desulfurization
lime
utilization
sulfurous
oxides
adsorption
fluidized
fuels
impregnation
porous
particulates
iron
oxide
achieved
spraying
aqueous
solution
mixed
sulfate
sulfite
limestone
transfer
bed
combustor
whereby
compounds
react
substrate
form
surface
spent
found
catalyze
regeneration
rate
reducing
environment
calcium
components
recycled
carbonaceous fuels
iron sulfate
fluidized bed
aqueous solution
iron oxide
bed combustor
fuel combustion
carbonaceous fuel
reducing environment
fluidized combustion
form iron
sulfurous oxides
porous lime
lime particulates
lime utilization
/110/122/252/423/