Che 321 problem. Please help me. Thank you.

1. Calculating the space time for parallel reactions. m-Xylene is reacted over a ZSM-5 zeolite catalyst. The following elementary reactions are bellows: m-Xylenek1Benzene+Methanem-Xylenek2p-Xylene a) (40 points) Calculate the PFR volume to achieve 85% conversion of m-Xylene in a pack bed reactor. Plot the overall selectivity and yields as a function of . A mixture of 75%m-Xylene and 25% inert is fed to tubular reactor at volumetric flow rate of 200dm3/s and a total concentration of 0.05mol/dm3. As a first approximation, neglect any other reactions such as reverse reactions and isomerization to o-Xylene. k1=0.22(s1)at673C.k2=0.71(s1)at673C. b) (20 points) Suppose that E1=20000molecal, what temperature would you recommend to maximize the formation of p-Xylene in a 2000dm3 CSTR