Role of coal devolatilization in comprehensive combustion models

Conference · Fri Jan 01 04:00:00 EST 1988 · Prepr. Pap., Am. Chem. Soc., Div. Fuel Chem.; (United States)

OSTI ID:5933146

Brewster, B S; Baxter, L L; Smoot, L D

Pulverized coal combustion is a complex interaction of several processes, including particle dispersion, gas-phase mixing, particle heatup and mass transfer, particle and gas reactions, recirculating and swirling fluid mechanics, radiative heat transfer, mineral matter phase transformations, and pollutant formation and destruction. Comprehensive models which include submodels for many of these processes have been developed by several investigators to predict local conditions inside combustors. This paper focuses on the role of coal devolatilization submodels in such predictions. The objectives of this paper are (1) to present theoretical results from an investigation of several thermal effects on devolatilization for single particles and in a comprehensive predictive model and (2) to illustrate the importance of considering chemistry/turbulence interactions when extending the model to allow for variable composition of the coal volatiles. The comprehensive model that was used is PCGC-2, Pulverized Coal Gasification or Combustion-2 Dimensional (axisymmetric). Thermal effects that were investigated include variable particle heat capacity, particle emissivity, heat of reaction during devolatilization, and volatiles heating value.

• Research Organization: Brigham Young Univ., Provo, UT (USA)
• OSTI ID: 5933146
• Report Number(s): CONF-870802-
• Conference Information: Journal Name: Prepr. Pap., Am. Chem. Soc., Div. Fuel Chem.; (United States) Journal Volume: 32:3
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010404 -- Coal
Lignite
& Peat-- Gasification
010409* -- Coal
Lignite
& Peat-- Pyrolysis & Carbonization-- (1987-)
CARBONACEOUS MATERIALS
COAL
DATA
DEVOLATILIZATION
EMISSIVITY
ENERGY SOURCES
ENTHALPY
FOSSIL FUELS
FUELS
INFORMATION
MATERIALS
MATHEMATICAL MODELS
MATTER
NUMERICAL DATA
OPTICAL PROPERTIES
PARTICLES
PHYSICAL PROPERTIES
REACTION HEAT
SPECIFIC HEAT
SURFACE PROPERTIES
THEORETICAL DATA
THERMODYNAMIC PROPERTIES
VOLATILE MATTER