BATCH DISTILLATION OF MULTICOMPONENT MIXTURES: SEMI-RIGOROUS MODEL WITHOUT HOLDUPS
Abstract
The semi-rigorous model without holdups and the semi-rigorous model with minimum holdups give almost the same results. However, the former uses integration step 0.1h and the latter integration step 0.00001h. This, and the fact that a semi-rigorous model describes the dynamics of the batch distillation process more reliably than a shortcut model, makes the semi-rigorous model without holdups more suitable for dynamic optimization of the process. For the calculation of the composition in the condenser, at each step of time, a modified Levenberg-Marquardt method is used. The computer implementation of the above algorithm is performed in the FORTRAN programming language. Imposing the constraints is avoided by introducing the composition normalization.
Keywords
batch distillation, mathematical modeling, multicomponent mixtures
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