Consider the following system of gas-phase reactions:B is•the desired product and X and y...

Consider the following system of gas-phase reactions:

B is•the desired product and X and y are foul pollutants get rid of. The specific reaction rates are at 27°C. The reaction system is to be operated at 27°C and 4 atm. Pure A enters the system at a volumetric flow rate 10 dm3/min.

(a) Sketch the instantaneous selectivities (SB/X, SB/Y, and SB/XY = rB/(rX + rY)) as a function of the concentration f CA as a function of the concentration of CA.

(b) Consider a series of reactors. What Should be the first reactor?

(c) What are the effluent concentrations of A, B, X, and Y from volume of the first reactor?

(d) What is the conversion of A in the first reactor?

(e) If 99% conversion of A is desired, what reaction scheme and reactor sizes should you use to maximize SB/Xy?

(f) Suppose thatE1 = 20,000 cal/mol, E2 = 10,000 cal/mol, and E3 = 30,000 cal/mol. What temperature would you recommend for a single CSTR with a space time of 10 min and an entering concentration of A of 0.1 mol/dm3?

(g) If you could vary the pressure between 1 and 100 atm, what pressure would you choose?