389Heterogeneous Reactors
Da = 3.76*10^(-6) ; % diffusivity of H2 (A) - m2/s
mu = 3.48*10^(-6) ; % viscosity Kg/m s
% scale up data
vg = 600 ; % gas flow rate m3/hr
xa0 = 0.95 ; % mole fraction of H2 (A) at inlet
xaf = 0.95 ; % final conversion as percentage of equilibrium conversion
D = 0.5 ; % reactor diamameter m
dp = 1/2 ; % cyliderical pellet diameter in inches
epsb = 0.45 ; % bed porosity
% CALCULATIONS
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% using equilibrium conversion data
K = (xae/(1-xae)) ; % equilibrium constant
k_dash = k*(1 + K)/K ; % modified rate constant
% rate equation (-ra) = k_dash(Ca - Cae)
dp = dp*(2.54*10^-2) ; % pellet diameter in m
L0 = dp/4 ; % equilent length of cylinder L0 = R/2
phi_dash ...