Question: The series of two chemical reactors described in Example is the initial process upon which this question is based. You may use all results from the modelling in Example without proving; simply cite the source of the equations.
(a) The solvent flow and composition at the inlet to the first reactor are to be controlled by two single-loop controllers. Add sensors and final elements as required and sketch the control system.
(b) Given this strategy is functioning perfectly (maintaining CAo constant), determine the model between the solvent flow and the concentration of the reactant in the second reactor, Ca and comment on the expected composition (Ca2) control performance using this manipulated-controlled variable pairing,
(c) Compare with the control performance .
Example: Series reactors. This example demonstrates that the parallel paths do not have to be external bypass streams but can be separate mechanisms within a single process. The process considered is a series of two CSTRs, shown in Figure.
