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Chemical characterization of precipitator ashes from pressurized hydrated-lime injection tests

Author
Henke, K. R.
Published
United States : [publisher not identified], 1986
Springfield, Va.: National Technical Information Service, [approximately 1986]
Physical Description
microfiche : negative ; 11 x 15 cm
Additional Creators
Moretti, C.

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Summary
Pressure-hydrated lime injection tests were run at the 50 M-W Hoot Lake Utility Plant near Fergus Falls, Minnesota. Direct injection of hydrated lime and other calcium compounds into utility furnaces may be able to significantly reduce sulfur dioxide emissions to the atmosphere. The commercial feasibility of these processes will partially depend on the disposal requirements of the solid wastes. Four ashes from the plants electric precipitator were characterized: a baseline ash from the Beulah, North Dakota lignite without hydrated-lime addition and three ashes under varying injection rates of Ca/SO2 of the 0.5, 1.1, and 3.5. The Ca/SO2 ratios are based on the moles of calcium injected to the moles of SO2 in the gas just prior to lime injection. The bulk chemistry of the ashes was determined by x-ray fluorescence. All leachates were analyzed by Inductively Coupled Argon Plasma and Atomic Absorption Spectrometry. Sulfate was determined by a turbidimetric method with barium chloride. Batch and column leaching tests were used to evaluate the soluble concentrations of selected elements in the ashes. None of the ashes produced EP or ASTM batch leachates that exceeded federal standards for As, Ba, Cd, Cr, Pb, or Se. 4 refs., 3 figs.
Report Numbers
DE86006248; DOE/FE/60181-191; CONF-8604124-2
Other Subject(s)
Collection
NTIS collection.
Note
DOE contract number: FC21-83FE60181
OSTI Identifier 6224812
Research organization: North Dakota Univ., Grand Forks (USA). Energy Research Center.
View MARC record | catkey: 47362633