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Combusting and Gasification Using Discrete Phase Method Combustion Through a Chamber

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BACKGROUND: Gasification and Coal Combustion Ash Deposition Slagging and Slag Disposal Fouling Downstream [McDaniel, 2002]

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GOVERNING EQUATIONS Gas Phase Equations Generation Destruction Diffusion Convection Turbulent Kinetic Energy Dissipation

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GOVERNING EQUATIONS (Continue) Conservation of Energy Conservation of Species Mass Diffusion Tensor Mass Rate Molecular Rate of Destruction and Creation of Species

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Constitutive Equations Force Momentum Balance Heat Balance Surface Reactions

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FORMULATION OF PROBLEM USING FLUENT Boundary ConditionSecondary AirPrimary AirPressure Outlet Velocity15 m/s50m/s------------------------ Temperature1500K 2000K Turbulence Intensity10%5% Hydraulic Diameter.75.251 m Oxygen Mass Fraction.23 Schematic of Domain Boundary Conditions

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SOLUTION Temperature ProfileMass Fraction of H2O Mass Fraction of CO2Mass Fraction of CO

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SOLUTION (CONTINUED) Particle Residence Time

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PARAMETRIC ANALYSIS Mole Fraction of Medium Volatile Coal at Selected Operating Temperatures as a Function of the Duct Length 1500 K Case

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PARAMETRIC ANALYSIS Mole Fraction of Medium Volatile Coal at Selected Operating Temperatures as a Function of the Duct Length 1000 K Case

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PARAMETRIC ANALYSIS Mole Fraction of Medium Volatile Coal at Selected Operating Temperatures as a Function of the Duct Length 2000 K Case

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VALIDATION: Equilibrium Equations System of Equations Based On Stoichiometry Equilibrium Coefficient based on Partial Pressures

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VALIDATION CONTINUE Values for Fractions The ratio of CO to CO2 in Fluent was.247 Difference between Calculated and Fluent is 14%

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Reference 1.McDaniel, J., Tampa Electric Polk Power Station Integrated Combined Cycle Project Final Report. 2002, Tampa Electric Company: Tampa. p. 1-15-1-71.

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