The combustion of Loy Yang brown coal char

Journal Article · Sat Apr 01 04:00:00 EST 1989 · Combust. Flame; (United States)

DOI:https://doi.org/10.1016/0010-2180(89)90074-6· OSTI ID:6182121

Young, B C; Smith, I W

Combustion rate measurements of Loy Yang brown coal char particles (88 ..mu..m median size) over temperature range 940-1420 K yielded a chemical rate coefficient R/sub c/, expressed as R/sub c/ = 12.6 exp(-68.3/(RT/sub rho/)) kg/m/sup 2/s (kPa O/sub 2/)/sup 0.4/. Particle size and density decreased with burn off, but in an unusual manner that requires further investigation. The value of the activation energy, the manner of change in size, and density of the particles during combustion, and the observed order in oxygen (0.4), suggests that the burning rate was controlled by the combined effects of pore diffusion and chemical reaction, with a tendency for chemical reaction to dominate.

• Research Organization: CSIRO Div. of Coal Technology, North Ryde, NSW (AU)
• OSTI ID: 6182121
• Journal Information: Combust. Flame; (United States), Journal Name: Combust. Flame; (United States) Vol. 76:1; ISSN CBFMA
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010600 -- Coal
Lignite
& Peat-- Properties & Composition
014000* -- Coal
Lignite
& Peat-- Combustion
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400800 -- Combustion
Pyrolysis
& High-Temperature Chemistry
ACTIVATION ENERGY
BROWN COAL
CARBONACEOUS MATERIALS
CHARS
CHEMICAL REACTION KINETICS
COAL
COMBUSTION PROPERTIES
DENSITY
DIFFUSION
ENERGY
ENERGY SOURCES
FOSSIL FUELS
FUELS
KINETICS
MATERIALS
PARTICLE SIZE
PHYSICAL PROPERTIES
PYROLYSIS PRODUCTS
REACTION KINETICS
SIZE
THERMODYNAMICS