Process development for production of coal/sorbent agglomerates

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

OSTI ID:5371423

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 (United States)
2. Illinois Univ., Urbana, IL (United States)
3. Army Construction Engineering Research Lab., Champaign, IL (United States)

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. Two potential combustion options are being considered -- fluidized bed combustors and industrial stoker boilers. During this quarter a pellet characterization test program was conducted using a fine coal (-28 mesh) concentrate collected from a southern Illinois preparation plant. Results indicate that carbonation produces significant improvements in compressive strength, impact and attrition resistance and weatherability. Also, 20 combustion tests were conducted on pellets formed with 0, 5 and 10% levels of calcium hydroxide (10% calcium hydroxide is a 2.3:1 Ca/S ratio for this sample). Tests were conducted at 850 and 1350 {degrees}C. Chemical analyses of the combustion residues are not yet complete so results will be reported next quarter. 8 refs., 7 tabs.

• Research Organization: Illinois State Geological Survey, Champaign, IL (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: FG22-90PC90176
• OSTI ID: 5371423
• Report Number(s): DOE/PC/90176-T44; ON: DE91018308
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010300* -- Coal
Lignite
& Peat-- Preparation-- (1987-)
010402 -- Coal
Lignite
& Peat-- Purification & Upgrading
014000 -- Coal
Lignite
& Peat-- Combustion
ALKALINE EARTH METAL COMPOUNDS
CALCIUM CARBONATES
CALCIUM COMPOUNDS
CALCIUM HYDROXIDES
CARBON COMPOUNDS
CARBONACEOUS MATERIALS
CARBONATES
CHEMICAL REACTIONS
COAL
COAL PREPARATION
COMBUSTION
DESULFURIZATION
DOCUMENT TYPES
ENERGY SOURCES
FOSSIL FUELS
FUELS
HYDROGEN COMPOUNDS
HYDROXIDES
MATERIALS
OXIDATION
OXYGEN COMPOUNDS
PELLETS
PRODUCTION
PROGRESS REPORT
SORPTION
THERMOCHEMICAL PROCESSES
WEATHERING