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QUESTION 2 Answer BOTH parts ( a ) and ( b ) A reaction A R takes place in a porous spherical catalyst particle with

QUESTION 2 Answer BOTH parts (a) and (b)
A reaction AR takes place in a porous spherical catalyst particle with radius 10mm and effective diffusivity, DeA=10-6m3ms. The concentration of the reactant outside the particle is 1molm3. The reaction exhibits saturation kinetics and the rate equation is:
-rA=k1CAk2+CAmolm3catalysts
(a) Calculate the effectiveness factor of the catalyst particles under the condition of strong pore diffusion resistance.
(b) The catalyst particles are packed into a multi-tubular column for chemical adsorption of reactant A. The molar flow rate and concentration of A in the feed are 1mols and 1molm3 respectively. Calculate the number of packed tubes required to achieve 99% conversion of A. The effectiveness factor mav be assumed constant and equal to the value obtained in (a).
Data:
k1=1molm3(s),k2=1molm3
Internal diameter of tubes, dt=0.02m
Length of tubes, Lt=10m
Particle density, rp=2500kgm3
Bulk density of packed beds packed bed
QUESTION 2 Answer BOTH parts (a) and (b)
A reaction AR takes place in a porous spherical catalyst particle with radius 10mm and effective diffusivity, DeA=10-6m3ms. The concentration of the reactant outside the particle is 1molm3. The reaction exhibits saturation kinetics and the rate equation is:
-rA=k1CAk2+CAmolm3catalysts
(a) Calculate the effectiveness factor of the catalyst particles under the condition of strong pore diffusion resistance.
(b) The catalyst particles are packed into a multi-tubular column for chemical adsorption of reactant A. The molar flow rate and concentration of A in the feed are 1mols and 1molm3 respectively. Calculate the number of packed tubes required to achieve 99% conversion of A. The effectiveness factor mav be assumed constant and equal to the value obtained in (a).
Data:
k1=1molm3(s),k2=1molm3
Internal diameter of tubes, dt=0.02m
Length of tubes, Lt=10m
Particle density, rp=2500kgm3
Bulk density of packed beds packed bed
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