期刊
COMPUTERS & CHEMICAL ENGINEERING
卷 153, 期 -, 页码 -出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.compchemeng.2021.107435
关键词
Multimodal chromatography; Nonlinear mixed-integer partial differential; equation constrained optimization; Optimal control; Partial outer convexification
资金
- German Fed-eral Ministry for Education and Research [05M16VHA, 05M17MBA]
- German Federal Ministry for Education and Research [05M18VHA]
- German Research Foundation [DFG-SPP 1962]
The study focuses on optimizing multimodal chromatography processes using a recent mechanistic model and mathematical framework, and finds that good separation can be achieved in a two-component system, with both salt concentration and discrete pH playing important roles in the purification process.
Multimodal chromatography is a powerful tool in the downstream processing of biopharmaceuticals. To fully benefit from this technology, an efficient process strategy must be determined beforehand. To facilitate this task, we employ a recent mechanistic model for multimodal chromatography, which takes salt concentration and pH into account, and we present a mathematical framework for the optimization of chromatographic processes. This framework also includes the use of discrete process controls in order to cover a wider range of chromatographic applications. We describe a procedure to numerically solve the resulting nonlinear mixed-integer optimal control problems. We discuss results of computational experiments, covering the cases where one wants to optimize the yield of the product or the batch-cycle time under specified purity requirements. The results indicate that a good separation can be achieved in a two-component system and that both salt concentration and discrete pH play an important role within the purification process. (c) 2021 Elsevier Ltd. All rights reserved.
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