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Consider the reaction sequence: ... , where ... is the lightest component and ... is the heaviest component. We assume that the desired product is component ... . This Demonstration compares the performances (yield and selectivity) of a plug-flow reactor (PFR) and a batch reactive distillation (BRD) system. It is found that the BRD system is superior to the PFR as far as yield and selectivity are concerned. This makes using BRD systems very attractive for such a reaction scheme and component volatilities. In order to make the calculations, the distillate rate policy is specified so that the distillate rate is proportional to the still's molar hold-up. In addition, we suppose that the reaction is taking place only in the still and that the distillate mole fraction of component ... is 100%. The method of Doherty and coworkers is slightly modified by taking a small time step (0.01) and choosing the constraint ... instead of equation (11) in their paper (see the Details section).
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