Pyrite thermochemistry, ash agglomeration, and char fragmentation during pulverized coal combustion: Quarterly report, December 15, 1988--March 15, 1989

Technical Report · Mon May 01 04:00:00 EDT 1989

DOI:https://doi.org/10.2172/6121298· OSTI ID:6121298

Akan-Etuk, Nniefiok; Niksa, S.; Kruger, C. H.

During the first quarter of 1989, we implemented the synthesis and classification procedures developed in past quarters to produce substantial amounts of samples for the pyrite thermochemistry studies. Two materials were generated, raw pyrite with relatively large mean sizes, for the studies of extraneous pyrite oxidation under simulated p.f. firing, and pyrite-loaded synthetic chars without macrovoids, for the studies of the oxidation of adventitious pyrite inclusions. Raw pyrite of a median size of 25 microns was produced with a two-stage classification scheme. Pyrite-loaded, non-macroporous synthetic chars were also produced. In the course of processing large amounts of samples, several potential improvements in the procedures were recognized, characterized, and implemented. Also, a new method to measure the pyrite loading was developed, to verify the loadings inferred from the density classification. 13 figs.

• Research Organization: Stanford Univ., CA (USA). High Temperature Gasdynamics Lab.
• DOE Contract Number: FG22-87PC79909
• OSTI ID: 6121298
• Report Number(s): DOE/PC/79909-6; ON: DE89013083
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000* -- Coal
Lignite
& Peat-- Combustion
AGGLOMERATION
ASHES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHARS
CHEMICAL REACTIONS
CLASSIFICATION
COAL
COMBUSTION
DOCUMENT TYPES
ENERGY SOURCES
FOSSIL FUELS
FRAGMENTATION
FUELS
INCLUSIONS
IRON COMPOUNDS
IRON SULFIDES
MATERIALS
MINERALS
OXIDATION
PARTICLE SIZE
PROGRESS REPORT
PYRITE
PYROLYSIS PRODUCTS
RESIDUES
SIZE
SULFIDE MINERALS
SULFIDES
SULFUR COMPOUNDS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS