Figure E. illustrates two CSTRS in a chemical manufacturing plant. Reactants A and B must be fed

Question:

Figure E. illustrates two CSTRS in a chemical manufacturing plant. Reactants A and B must be fed to the first stirred-tank at a constant molar ratio. Reactant C is introduced to the second stirred-tank at a constant molar ratio to reactant A. Five control valves are available for purposes of controlling the plant production rate and concentrations. Flow rates shown in the figure are in mass units. Reactor volumes are constant. The assumed reaction kinetics are:A + B ? DC + D ? EIf each reaction goes to completion in its respective reactor, how can you control the plant production rate of the desired product E using each of the five valves? Specify how you would use ratio controllers to maintain the desired stoichiometry in each case, and explain the advantages and disadvantages relative to the other possible locations.