Heat transport in coal particles during devolatilization in fluidized bed

Book · Wed Dec 31 04:00:00 EST 1997

OSTI ID:357866

Komatina, M S ^[1]; Ilic, M S; Oka, S N ^[2]

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1. Belgrade Univ. (Yugoslavia). Mechanical Engineering Faculty
2. Inst. of Nuclear Sciences-Vinca, Belgrade (Yugoslavia). Lab. for Thermal Engineering and Energy

A devolatilization model describing unsteady behavior of the coal particle during heating up and devolatilization were performed. The mathematical model enables analysis of the particle temperature profile, using different relations for thermal properties ({lambda} and c{sub p}), which can be constant or function of temperature. The temperatures of two coals, lignite and brown coal were determined by measuring of the center temperature during heating up and devolatilization. The coal particles were shaped at diameter 7, 8 and 10 mm. The measurement data were compared with mathematical model results using different values of coal thermal properties. The best fitting was obtained for constant thermal properties, for brown coal {lambda} = 0.20 (W/m.K) and c{sub p} = 1200 (J/kg.K) and for lignite {lambda} = 0.17 (W/m.K) and c{sub p} = 1100 (J/kg.K).

• OSTI ID: 357866
• Report Number(s): CONF-9705116--; ISBN 0-7918-1557-9
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
BROWN COAL
DEVOLATILIZATION
EXPERIMENTAL DATA
FLUIDIZED-BED COMBUSTION
HEAT TRANSFER
LIGNITE
MATHEMATICAL MODELS
TEMPERATURE DISTRIBUTION
THEORETICAL DATA