23 European Symposium on Computer Aided Process Engineering
23 European Symposium on Computer Aided Process Engineering

Author: Alireza Hosseini

Publisher: Elsevier Inc. Chapters

Published: 2013-06-10

Total Pages: 17

ISBN-13: 0128086300

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In this paper, a new control strategy that employs a mid-course correction to control the particle size distribution in emulsion polymerization is developed. In this approach, online and infrequent measurements are used to obtain the states of the system at the mid-course of the process. Then an optimization is performed to obtain the optimal trajectory of the input from the mid-course up to the end of the process. For this optimization, a hybrid model is used. This hybrid model consists of the Fokker-Planck particle size distribution model of emulsion polymerization and a data-driven component which corrects the predictions of the Fokker-Planck model based upon the estimated states of the system at the mid-course of the process.

Model Reduction and Coarse-Graining Approaches for Multiscale Phenomena
Model Reduction and Coarse-Graining Approaches for Multiscale Phenomena

Author: Alexander N. Gorban

Publisher: Springer Science & Business Media

Published: 2006-09-22

Total Pages: 554

ISBN-13: 3540358889

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Model reduction and coarse-graining are important in many areas of science and engineering. How does a system with many degrees of freedom become one with fewer? How can a reversible micro-description be adapted to the dissipative macroscopic model? These crucial questions, as well as many other related problems, are discussed in this book. All contributions are by experts whose specialities span a wide range of fields within science and engineering.

Reduced Order Methodologies for the Control of Particle Size Distribution in Emulsion Polymerization
Reduced Order Methodologies for the Control of Particle Size Distribution in Emulsion Polymerization

Author: Mustafa Tekin Dokucu

Publisher: ProQuest

Published: 2007

Total Pages: 354

ISBN-13: 9780549362760

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Emulsion polymerization has significant advantages over bulk and solution polymerization processes. These advantages result mostly from the multiphase and compartmentalized nature of the emulsion polymerization, delivering a high versatility to product qualities but adding to the complexity of the process. The control of the full particle-size distribution (PSD) in emulsion polymerization is vital for industrial applications where the target distributions are usually complex and/or multimodal. Despite the strong need, control of the full PSD presents a challenging task mainly due to the complexity of emulsion polymerization and the lack of adequate on-line measurement instrumentation. In this work, in-batch and batch-to-batch control strategies are developed for the regulation of the full PSD in semibatch emulsion copolymerization of Vinyl Acetate/Butyl Acrylate with nonionic surfactants and a redox initiator pair. These strategies are also applicable for regulation of distributions in other particulate systems governed by population balances.