Evidence of the rich flammability limit for pulverized Pittsburgh seam coal-air mixtures

Journal Article · Sat Feb 01 00:00:00 EST 1986 · Combust. Flame; (United States)

DOI:https://doi.org/10.1016/0010-2180(86)90121-5· OSTI ID:5625132

Slezak, S E; Buckius, R O; Krier, H

Evidence for a rich flammability limit is presented for pulverized Pittsburgh seam coal (36% volatiles, 56.1% fixed carbon, 50 ..mu..m mass mean particle diameter). Experiments were conducted in a large (0.3 m diam by 4.5 m long) horizontal tube that generated a vertical dust concentration gradient for the rich mixtures. Horizontally propagating steady state flames were observed only in regions where the concentration was below 1.5 kg/m/sup 3/. When the location where the dust concentration exceeded 1.5 kg/m/sup 3/ was varied, the edge of the visible flame front moved accordingly. This is interpreted as evidence for a rich limit of 1.5 kg/m/sup 3/ for this coal.

• Research Organization: Department of Mechanical and Industrial Engineering, University of Illinois of Urbana-Champaign, IL 61801
• OSTI ID: 5625132
• Journal Information: Combust. Flame; (United States), Vol. 63:1-2
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
COAL FINES
COMBUSTION KINETICS
DETONATION LIMITS
FLAMMABILITY
AIR
CARBON
DUSTS
FLAME PROPAGATION
MIXTURES
PARTICLE SIZE
QUANTITY RATIO
RESEARCH PROGRAMS
STEADY-STATE CONDITIONS
VOLATILE MATTER
CHEMICAL REACTION KINETICS
COMBUSTION PROPERTIES
DISPERSIONS
ELEMENTS
FLUIDS
GASES
KINETICS
MATTER
NONMETALS
REACTION KINETICS
SIZE
014000* - Coal
Lignite
& Peat- Combustion