Pyrolysis and combustion of bituminous coal fractions in an entrained-flow reactor
Journal Article
·
· Energy Fuel; (United States)
The effects of particle size and maceral composition on the weight loss rate of coal particles during the ignition stage of a pulverized-coal flame in an entrained-flow reactor were investigated. The role of particle size in combustion was found to be coupled to associated changes in chemical composition and thermal history. In addition, the variation in particle size led to a difference in the radial dispersion of the coal particles in the reactor and consequently to a variation in the local air/fuel ratio. The role of maceral composition in combustion varied with the furnace temperature and particle size. A high concentration of liptinites significantly enhanced the ignitability and weight loss rate under fuel-rich conditions. The presence of inertinites showed a greater influence on delaying ignition at low temperatures. The data suggest that large particle size, high inerts concentration and low furnace temperature enhance the contribution of heterogeneous combustion to the weight loss observed during the ignition stage in a pulverized coal flame. 23 refs., 10 figs., 1 tab.
- Research Organization:
- Pennsylvania State Univ., University Park
- OSTI ID:
- 6444736
- Journal Information:
- Energy Fuel; (United States), Journal Name: Energy Fuel; (United States) Vol. 1:3; ISSN ENFUE
- Country of Publication:
- United States
- Language:
- English
Similar Records
Experimental investigation of the initial stages of pulverized bituminous coal combustion
Effect of maceral composition and vitrinite reflectance on the combustion behavior of six hvA bituminous coals
Reactivity of whole coals, selected pure maceral fractions, and cleaned coal products
Thesis/Dissertation
·
Mon Dec 31 23:00:00 EST 1984
·
OSTI ID:6969088
Effect of maceral composition and vitrinite reflectance on the combustion behavior of six hvA bituminous coals
Conference
·
Thu Dec 31 23:00:00 EST 1987
· Prepr. Pap., Am. Chem. Soc., Div. Fuel Chem.; (United States)
·
OSTI ID:5930656
Reactivity of whole coals, selected pure maceral fractions, and cleaned coal products
Technical Report
·
Mon Dec 31 23:00:00 EST 1990
·
OSTI ID:6132031
Related Subjects
01 COAL, LIGNITE, AND PEAT
014000* -- Coal
Lignite
& Peat-- Combustion
BITUMINOUS COAL
BLACK COAL
CARBONACEOUS MATERIALS
CHEMICAL COMPOSITION
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COAL
COMBUSTION
COMBUSTION KINETICS
DECOMPOSITION
ENERGY SOURCES
ENTRAINMENT
FOSSIL FUELS
FUEL-AIR RATIO
FUELS
IGNITION
KINETICS
MACERALS
MATERIALS
OXIDATION
PARTICLE SIZE
PULVERIZED FUELS
PYROLYSIS
REACTION KINETICS
SIZE
TEMPERATURE EFFECTS
THERMOCHEMICAL PROCESSES
014000* -- Coal
Lignite
& Peat-- Combustion
BITUMINOUS COAL
BLACK COAL
CARBONACEOUS MATERIALS
CHEMICAL COMPOSITION
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COAL
COMBUSTION
COMBUSTION KINETICS
DECOMPOSITION
ENERGY SOURCES
ENTRAINMENT
FOSSIL FUELS
FUEL-AIR RATIO
FUELS
IGNITION
KINETICS
MACERALS
MATERIALS
OXIDATION
PARTICLE SIZE
PULVERIZED FUELS
PYROLYSIS
REACTION KINETICS
SIZE
TEMPERATURE EFFECTS
THERMOCHEMICAL PROCESSES