Mineral transformations in selected coals - Size and composition of the ash

Conference · Sun Jan 01 04:00:00 EST 1989 · Preprints of Papers, American Chemical Society, Division of Fuel Chemistry; (USA)

OSTI ID:5002642

Helble, J J; Srinivasachar, S; Katz, C B; Boni, A A ^[1]

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1. PSI Technology Co., Andover, MA (USA)

The transformation of minerals during pulverized coal combustion has been examined by burning utility sized coals (70% < 200 mesh) in a laboratory-scale combustor. Experiments were conducted with several coals possessing different mineralogies, with particular attention paid to Kentucky {number sign} 11 bituminous. Size and composition of the initial minerals and the resulting ash were measured by a variety of techniques, including computer controlled SEM, low temperature ashing, deposition on a cascade impactor, and optical (Malvern) particle size analysis. Results for the Kentucky {number sign} 11 coal suggest a large degree of coalescence is occurring between illite, kaolinite, and quartz minerals, with occasional iron incorporation into the resulting glass. Partitioning of the acid-leachable potassium was found to split between incorporation into the glass and vaporization. For other coals, such as Buelah lignite, mineral fragmentation was inferred from the data, presumably due to large quantities of large (> 40 microns) pyrite present.

• OSTI ID: 5002642
• Report Number(s): CONF-8904164--
• Conference Information: Journal Name: Preprints of Papers, American Chemical Society, Division of Fuel Chemistry; (USA) Journal Volume: 34:2
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
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010600 -- Coal
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&amp; Peat-- Properties &amp; Composition
ASHES
BENCH-SCALE EXPERIMENTS
CARBONACEOUS MATERIALS
CHEMICAL COMPOSITION
CHEMICAL REACTIONS
COAL
COMBUSTION
COMBUSTORS
DATA
DIAGRAMS
ENERGY SOURCES
EXPERIMENTAL DATA
FOSSIL FUELS
FUELS
INFORMATION
MATERIALS
MINERALS
NUMERICAL DATA
OXIDATION
PARTICLE SIZE
PARTICLES
PHASE DIAGRAMS
RESIDUES
SIZE
THERMOCHEMICAL PROCESSES