Process networks with recycle are well-known to exhibit complex dynamics and to present significant control challenges, due to the feedback interactions induced by the recycle streams. In this paper, we address the dynamic analysis and control of process networks with recycle and small purge streams used for removal of light inert components (feed impurities and/or reaction byproducts) from the recycle loop. We establish, through a singular perturbation analysis, that such networks exhibit a time scale separation in their dynamics, with the slow dynamics induced by the small amount of inert purged from the recycle loop. We also present a model reduction method for deriving a nonlinear low-order model of this slow dynamics which can be used to rationally address the control of the level of inerts in the network.
|Original language||English (US)|
|Number of pages||6|
|Journal||IFAC Proceedings Volumes (IFAC-PapersOnline)|
|State||Published - 2004|
|Event||7th International Symposium on Advanced Control of Chemical Processes, ADCHEM 2003 - , Hong Kong|
Duration: Jan 11 2004 → Jan 14 2004
Bibliographical noteFunding Information:
Partial support for this work by ACS-PRF 38114-AC9 and NSF-CTS 0234440 is gratefully acknowledged
Copyright © IFAC 2003
Copyright 2020 Elsevier B.V., All rights reserved.
- DAE systems
- Model reduction
- Nonlinear control
- Singular perturbations