Distillation Residue Curve Maps (D-RCM’s) have proven to be an extremely useful graphical tool in the design and operation of both batch and continuous distillation processes. Recently submitted work by the authors has investigated the applications of Residue Curve Maps for membrane permeation systems. Such maps are referred to as M-RCM’s. This paper aims to develop a graphical tool to provide ...

In order to implement a quasi-optimal trajectory derived from pinch theory [1,2], a temperature tracking control system composed by an open-loop reflux ratio control plus a closed-loop correction for disturbance rejection is proposed. To adjust the closed-loop controller we use the referential dynamic reaction of the process [3] and tuning rules [4] that, though they were originally developed f...

Batch time (energy) requirements comparisons are provided for the separation of a ternary zeotropic mixture in three closed batch column configurations. Two multivessel column arrangements, with and without vapor bypass, and a regular batch column (rectifier) operated under the cyclic policy, were studied. First, the improvement achieved in the middle vessel dynamics by elimination of the vapor...

Multivessel batch distillation (MBD) has been proposed and investigated to meet changing demands of the specialty and fine chemistry. This contribution addresses the multiobjective optimisation of a MBD with one intermediate vessel for the first time. The process is highly non-linear and inherent dynamic. Design and operating parameters has been considered simultaneously. The problem formulatio...

The separation of multicomponent mixtures by batch distillation generally requires the sequential processing of several splits in one column. The sequencing of the splits and the choice of the column configuration, e.g. regular or inverse column, has a substantial impact on the economic potential of the process. Beside these structural design decisions the profitability of the process is furthe...

This work presents a robust method for the integrated design and operation of batch distillation whereby optimal column sizing, process flexibility and operating policies are obtained simultaneously based on the complex economic trade-offs between capital investment, production revenue and utility costs. The proposed stochastic framework, which utilises a genetic algorithm and a penalty functio...

BACKGROUND To make lignocellulosic fuel ethanol economically competitive with fossil fuels, it is necessary to reduce the production cost. One way to achieve this is by increasing the substrate concentration in the production process, and thus reduce the energy demand in the final distillation of the fermentation broth. However, increased substrate concentration in simultaneous saccharification...