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November 6, 2018, 02:36 |
which model should i use..........?
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Member
Join Date: Apr 2017
Location: india
Posts: 96
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I am facing a difficulty in selecting which model TO should for this KIND OF PROBLEM etc.......................
Model description The mixture of iron ore and coal particle make up a composite pellet which is considered as a porous medium. Both solid and gas phases are assumed to be continuum. The pellet shape is assumed to be spherical. these are the reactions which are happening inside the pellet. 3Fe2O3 + CO = 2Fe3O4 + CO2 Fe3O4 + CO = 3FeO + CO2 FeO + CO = Fe + CO2 CO2 + C = 2CO eq solved include - continuity, mass balance , momentum eq that's all rate of the first 3 reactions are given by Ri= Si*ni*(4phi*(r^2))*kio*exp(-Ei/RT)*(Cco-(Cco2/keq)) Ri = Reaction rate Equation (mol/m3.s) S = Shape factor of particles r = Average particle radius (m) ko = pre-exponential constant (m/s) Ea = Activation Energy (J/mol) R = Universal Gas constant. (J/ mol.K) Cco , Cco2 = concentration of Cco , Cco2 (mol/ m3) n = number of particles of solid reactants for reaction i in the mixture (m^-3) etc In reality there are 2 different type of solid particle of different sizes are there which interact with gas as surface reactions, which model should i start with................KINDLY HELP ME OUT GUYS. THANKS A LOT IN ADVANCE |
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heterogeneous reaction, particle reaction, surface reaction |
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