Process development for production of coal/sorbent agglomerates

Technical Report · Tue Jan 01 04:00:00 EST 1991

OSTI ID:5632378

Rapp, D M; Lytle, J M; Hackley, K C; Moran, D L; Becvar, S ^[1]; Berger, R L ^[2]; Griggs, K ^[3]

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1. Illinois State Geological Survey, Champaign, IL (USA)
2. Illinois Univ., Urbana, IL (USA)
3. Army Construction Engineering Research Lab., Champaign, IL (USA)

Current coal mining and processing procedures produce significant quantities of fine coal with limited marketability. The objective of this work is to pelletize these fines with a sulfur capturing sorbent such as calcium hydroxide to produce a fuel which will meet future sulfur dioxide emission levels. To decrease binder costs, carbonation, which is the reaction of calcium hydroxide with carbon dioxide in the presence of moisture to produce calcium carbonate, is being investigated as a method for improving pellet quality. The calcium carbonate formed acts as a cementitious matrix which improves pellet strength. In previous work utilizing IBC-106 from the Illinois Basin Coal Sample Program, carbonation was determined to be effective at significantly improving pellet compressive strength, impact and attrition resistance and weatherability. In combustion tests conducted at 850{degree}C, sulfur capture of 80% was achieved for pellets having 17.5% calcium hydroxide (a Ca/S ration of 2/1). In this years work, a flotation concentrate collected from an operating Illinois preparation plant is being used for testing. Results indicate carbonation significantly increases the compressive strength of pellets formed with 10% calcium hydroxide. 6 refs., 1 fig., 5 tabs.

• Research Organization: Illinois Dept. of Energy and Natural Resources, Springfield, IL (USA)
• Sponsoring Organization: DOE; ILDENR; USDOE, Washington, DC (USA); Illinois Dept. of Energy and Natural Resources, Springfield, IL (USA)
• DOE Contract Number: FG22-90PC90176
• OSTI ID: 5632378
• Report Number(s): DOE/PC/90176-T28; ON: DE91014046
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010300* -- Coal
Lignite
& Peat-- Preparation-- (1987-)
36 MATERIALS SCIENCE
360603 -- Materials-- Properties
AIR POLLUTION ABATEMENT
ALKALINE EARTH METAL COMPOUNDS
BINDERS
BITUMINOUS COAL
BLACK COAL
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CALCIUM HYDROXIDES
CARBON COMPOUNDS
CARBONACEOUS MATERIALS
CARBONATES
CHEMICAL REACTIONS
COAL
COAL FINES
COMBUSTION
COMPRESSION STRENGTH
DOCUMENT TYPES
DRYING
ELEMENTS
ENERGY SOURCES
FABRICATION
FOSSIL FUELS
FUELS
HYDROGEN COMPOUNDS
HYDROXIDES
MATERIALS
MECHANICAL PROPERTIES
MOLDING
NONMETALS
OXIDATION
OXYGEN COMPOUNDS
PELLETIZING
PELLETS
POLLUTION ABATEMENT
PROGRESS REPORT
SORPTION
SULFUR
THERMOCHEMICAL PROCESSES