A catalytic zero-order reaction is conducted using a catalyst with a flat-plate geometry.

a. Write the governing material balance equations to describe the processes occurring within the pellet.
b. What is the maximum value of Thiele modulus (max, =1) for the internal effectiveness factor to be 1? Obtain the concentration profile of the reactant as a function of position for Ó < Omax, E=1.
c. Obtain an equation relating the location of zero concentration to Thiele modulus for Φ>Φmax, ε=1.
d. Plot the effectiveness factor as function of Thiele modulus.