Numerical study of coal dust explosions in spherical vessels

Conference · Wed Jun 01 04:00:00 EDT 1988 · Am. Chem. Soc., Div. Gas Fuel Chem., Prepr.; (United States)

OSTI ID:6505408

Continillo, G ^[1]

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1. Istituto Ricerche sulla Combustione, Consiglio Nazionale delle Ricerche, Naples (IT)

The unsteady flame propagation through a coal dust-air suspension in a spherical enclosure is studied by means of a one-dimensional, spherically-symmetric mathematical model. An Eulerian formulation is adopted for the gas phase mass continuity, species and energy balance equations, while a Lagrangian formulation is employed for the mass, energy and momentum balance equations for the particles. The pressure is assumed to be uniform in space (low Mach number) but varies in time. Preliminary calculations have been performed with a very simple coal particle submodel, in which a single-step devolatilization reaction with Arrhenius-type kinetics and quasi-steady heat, mass and momentum transfer to/from the particles is considered. Coal dust-air flame propagation could be predicted on the basis of devolatilization and homogeneous combustion reaction only. The model can represent a useful framework for the development and validation of particle-scale models, to be implemented in more complex coal combustion situations.

• OSTI ID: 6505408
• Report Number(s): CONF-8806136-
• Conference Information: Journal Name: Am. Chem. Soc., Div. Gas Fuel Chem., Prepr.; (United States) Journal Volume: 33:2
• 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
CARBONACEOUS MATERIALS
CHEMICAL REACTION KINETICS
CHEMICAL REACTIONS
COAL
COMBUSTION
COMBUSTION KINETICS
DEVOLATILIZATION
DUSTS
ENERGY BALANCE
ENERGY SOURCES
ENERGY TRANSFER
FLAME PROPAGATION
FLUIDIZED-BED COMBUSTION
FOSSIL FUELS
FUELS
HEAT TRANSFER
KINETICS
MACH NUMBER
MASS TRANSFER
MATERIALS
MATHEMATICAL MODELS
ONE-DIMENSIONAL CALCULATIONS
OXIDATION
PARTICLE SIZE
REACTION KINETICS
SCALE MODELS
SIZE
STRUCTURAL MODELS
THERMOCHEMICAL PROCESSES
VELOCITY