The use of FBC wastes in the reclamation of coal slurry solids. Technical report, March 1, 1992--May 31, 1992

Technical Report · Thu Oct 01 04:00:00 EDT 1992

DOI:https://doi.org/10.2172/10184909· OSTI ID:10184909

Dreher, G B; Roy, W R; Steele, J D ^[1]

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1. Illinois State Geological Survey, Champaign, IL (United States)

Fluidized bed combustion (FBC) is a relatively new technology that is used commercially for the combustion of coal. In Illinois, this technology is valuable because it allows the combustion of Illinois high sulfur coal without pollution of the atmosphere with vast quantities of sulfur oxides. In FBC, coal is mixed with limestone or dolomite either before injection into the combustion chamber or in the combustion chamber. As the coal burns, sulfur in the coal is oxidized to S0{sub 2} and this is trapped by reaction with the limestone or dolomite to form gypsum (CaSO{sub 4} {center_dot} 2H{sub 2}O). Solid by-products from FBC are generally a mixture of calcium oxide, gypsum, coal ash, and unburned coal. The present research project is designed to provide initial data on one possible use of FBC waste. FBC wastes from five different locations in Illinois are mixed with coal slurry solids (CSS) from two different coal preparation plants at Illinois coal mines. In mixtures of FBC waste and coal slurry solids, the alkaline components of the FBC waste are expected to react with acid produced by the oxidation of pyrite in the coal slurry solid. An objective of this research is to determine the chemical composition of aqueous leachates from mixtures of FBC wastes, generated under various operating conditions, and the coal slurry solids. These data will be used in future research into the ability of such mixtures to support seed germination and plant growth. The final goal of this and future research is to determine whether mixed FBC waste and coal slurry solids can be used as a satisfactory growing medium in slurry pond reclamation. The chemical analyses of the 8 starting solids (5 FBC wastes, 2 Css samples, and 1 agricultural limestone sample) were completed.

• Research Organization: Illinois Dept. of Energy and Natural Resources, Springfield, IL (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States); Illinois Dept. of Energy and Natural Resources, Springfield, IL (United States)
• DOE Contract Number: FG22-91PC91334
• OSTI ID: 10184909
• Report Number(s): DOE/PC/91334--T98; ON: DE93000944
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320305
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
COAL
COAL PREPARATION PLANTS
COMBUSTION
EXPERIMENTAL DATA
FLUIDIZED-BED COMBUSTION
GYPSUM
ILLINOIS
INDUSTRIAL WASTE MANAGEMENT
LEACHATES
LIMESTONE
MINERAL WASTES
PONDS
PROGRESS REPORT
PYRITE
SULFATION
WASTE DISPOSAL
WASTE PRODUCT UTILIZATION