Similarities Between Batch and Continuous Reactive Equipment

2 Similarities Between Batch and Continuous Reactive Equipment 

1 The Standard Batch By standard batch, we have in mind a batch reactor where there is no inflow or outflow of material during the reaction period. The reactor contents are well mixed, although the concentration of species evolves with respect to time. Given an initial concentration of species, the concentration profile within a standard batch reactor may be determined by the integration of the appropriate rate expression. Thus, we have for the standard batch 

The solution trajectory obtained by the integration of Equation 7.20 is identical to that obtained by the integration of the PER equation for the same initial conditions. Reaction time of the batch replaces residence time of the PER as the integration parameter in this regard. As a result, optimal reactor structures where PFRs form part of the AR boundary may be achieved in batch processes by running a standard batch reactor with the appropriate reaction time. 

2 Fed-Batch Reaction Eed-batch reactors, often also referred to as semi-batch reactors, are those that allow the feed of additional material into the reaction vessel during the reaction period, and may be used to bias the selectivity of components in competing reactions. The general form of the fed-batch reactor is given as follows  

a = F(t)W(t), F(t) is the rate of material addition into the reactor, and V(t) the reactor volume. It is assumed 

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