Optimization of molecular weight distribution using batch-to-batch adjustments
A batch-to-batch optimization methodology for producing a desired MWD using an approximate model is presented. A measurement of the molecular weight distribution (MWD) at the end of the batch is used to update manipulated variable trajectories for the next batch, thus iterating into a good operating...
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Format: | Tagungsbericht |
Sprache: | eng |
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Zusammenfassung: | A batch-to-batch optimization methodology for producing a desired MWD using an approximate model is presented. A measurement of the molecular weight distribution (MWD) at the end of the batch is used to update manipulated variable trajectories for the next batch, thus iterating into a good operating policy. The optimization approach is then extended for use as an online control method. A multivariable statistical process control (MSPC) monitoring scheme is developed for deciding when a new batch optimization is required. The optimizer remains on, but dormant while the desired MWD is being produced, and re-optimizes the process quickly if the process changes and poor quality polymer is produced. The combined MSPC/batch-to-batch optimizer is demonstrated on a simulated semi-batch polystyrene reactor. |
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ISSN: | 0743-1619 2378-5861 |
DOI: | 10.1109/ACC.1998.703202 |