Pyrite thermochemistry, ash agglomeration, and char fragmentation during pulverized coal combustion: Quarterly report, June 15, 1988--September 15, 1988

Technical Report · Sat Oct 01 04:00:00 EDT 1988

OSTI ID:6806909

Akan-Etuk, A; Niksa, S; Kruger, C H

We perfected the synthesis of carbons with controlled macroporosity and pyrite loadings. Lycopodium spores were found to be ideal formers of macroporosity, being monodisperse, spherical, and nontoxic. They are added as a powder during the furfuryl alcohol polymerization, so the number density of voids is easily controlled. They are almost completely volatilized during curing, and leave no ash or residue. Our procedure generates nominally uniform, 16 micron spherical voids in a microporous carbon matrix. Pyrite inclusions are generated by adding sized pyrite particles during the furfuryl alcohol polymerization. However, the pyrite loading was found to be difficult to control. Due to its high density, the pyrite tends to settle throughout the synthesis. We must rely on ultracentrifugation using a range of liquids with controlled specific gravity to segregate samples with controlled pyrite loadings. 3 figs.

• Research Organization: Stanford Univ., CA (USA). High Temperature Gasdynamics Lab.
• DOE Contract Number: FG22-87PC79909
• OSTI ID: 6806909
• Report Number(s): DOE/PC/79909-4; ON: DE89005380
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
014000* -- Coal
Lignite
& Peat-- Combustion
AGGLOMERATION
ALCOHOLS
ASHES
CARBONACEOUS MATERIALS
CHALCOGENIDES
CHARS
CHEMICAL REACTIONS
COAL
COMBUSTION
CRYSTAL STRUCTURE
DENSITY
DOCUMENT TYPES
ENERGY SOURCES
FOSSIL FUELS
FRAGMENTATION
FUELS
HYDROXY COMPOUNDS
INCLUSIONS
IRON COMPOUNDS
IRON OXIDES
IRON SULFIDES
MATERIALS
MICROSTRUCTURE
MINERALS
ORGANIC COMPOUNDS
OXIDATION
OXIDES
OXYGEN COMPOUNDS
PHYSICAL PROPERTIES
POLYMERIZATION
POROSITY
PROGRESS REPORT
PYRITE
PYROLYSIS PRODUCTS
RESIDUES
SULFIDE MINERALS
SULFIDES
SULFUR COMPOUNDS
SYNTHESIS
THERMOCHEMICAL PROCESSES
TRANSITION ELEMENT COMPOUNDS