The Modeling and Simulation of Emulsion Polymerization Reactors
Author:
Publisher:
Published: 1985
Total Pages: 418
ISBN-13:
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Author:
Publisher:
Published: 1985
Total Pages: 418
ISBN-13:
DOWNLOAD EBOOKAuthor: Joseph Schork
Publisher: Routledge
Published: 2017-09-20
Total Pages: 378
ISBN-13: 1351457934
DOWNLOAD EBOOKThis reference and text provides an in-depth description of developments in control techniques and their application to polymerization reactors and offers important introductory background information on polymerization reaction engineering.;Discussing modelling, identification, linear, nonlinear and multivariable schemes, Control of Polymerization Reactors: presents all available techniques that can be used to control reactors properly for optimal performance; shows how to manipulate pivotal variables that affect reactor control; examines methods for deriving dynamic process models to improve reactor efficiency; reviews reactor control problems and points out end-use properties; supplies methods for measuring process variables, and ways to estimate variables that can't be measured; and explains how single-input, single-output (SISO) strategies can be effectively used for control.;Filled with illustrative examples to clarify concepts, including more than 730 figures, tables and equations, Control of Polymerization Reactors is intended for use as a reference for chemical, process development, process design, research and development, control systems, and polymer engineers; and polymer chemists and physicists; as well as a text for upper-level undergraduate and graduate students in polymerization reactor control courses.
Author: James Blake Rawlings
Publisher:
Published: 1985
Total Pages: 604
ISBN-13:
DOWNLOAD EBOOKAuthor: J. Clint Follette
Publisher:
Published: 2001
Total Pages: 272
ISBN-13:
DOWNLOAD EBOOKAuthor: Georgios A. Kalfas
Publisher:
Published: 1992
Total Pages: 670
ISBN-13:
DOWNLOAD EBOOKAuthor: Dharmesh Hansora
Publisher: LAP Lambert Academic Publishing
Published: 2012
Total Pages: 228
ISBN-13: 9783659292460
DOWNLOAD EBOOKPolymerization Reaction Engineering is used to understand how the reaction mechanism, the physical transport processes reactor, configuration and reactor operating conditions that affect the macromolecular architecture as well as the morphological properties of the polymer product. By use of modeling methodology, these mathematical models can be classified into Micro Scale kinetic models, Meso Scale physical, transport and thermodynamic models and Macro Scale dynamic reactor ones. These models are used to achieve goals like production cost reductions and more stringent "Polymer Quality" requirements. The Polymerization process of 1, 3 Butadiene has been modeled by Zeigler-Natta Polymerization (ZNP) reaction mechanism. The efficacy of models has been tested by comparing the predicted results on MW and MWD with those available in the published literature. Mechanistic models for Batch & CSTRs in cascade are developed. These models are represented in the mathematical form and simulated by using Solver in Excel Spreadsheet Software here. The results of simulations performed from developed model in conjunction with the reported experimental data for various catalysts are discussed.
Author: Iván-Dario Gil
Publisher:
Published: 2014
Total Pages: 0
ISBN-13:
DOWNLOAD EBOOKIn this work, modeling, simulation, dynamic optimization and nonlinear control of an industrial emulsion polymerization process to produce poly-vinyl acetate (PVAc) are proposed. The reaction is modeled as a two-phase system composed of an aqueous phase and a particle phase. A detailed model is used to calculate the weight average molecular weight, the number average molecular weight and the dispersity. The moments of the growing and dead chains are used to represent the state of the polymer and to calculate the molecular weight distribution (MWD). The case study corresponds to an industrial reactor operated at a chemical company in Bogotá. An industrial scale reactor (11 m3 of capacity) is simulated where a semi-batch emulsion polymerization reaction of vinyl acetate is performed. Dynamic optimization problem is solved directly using a Nonlinear Programming solver. Integration of differential equations is made using Runge-Kutta method. Three different optimization problems are solved from the more simplistic (only one control variable: reactor temperature) to the more complex (three control variables : reactor temperature, initiator flow rate and monomer flow rate) in order to minimize the reaction time. A reduction of 25% of the batch time is achieved with respect to the normal operating conditions applied at the company. The results show that is possible to minimize the reaction time while some polymer desired qualities (conversion, molecular weight and solids content) satisfy the defined constraints. A nonlinear geometric control technique by using input/output linearization is adapted to the reactor temperature control. An extended Kalman filter (EKF) is implemented to estimate unmeasured states and it is tested in different cases including a robustness study where model errors are introduced to verify its good performance. After verification of controller performance, some process changes were proposed in order to improve process productivity and polymer quality. Finally, the optimal temperature profile and optimal feed policies of the monomer and initiator, obtained in a dynamic optimization step, are used to provide the optimal set points for the nonlinear control. The results show that the nonlinear controller designed here is appropriate to follow the optimal temperature trajectories calculated previously.
Author: Petros Dafniotis
Publisher:
Published: 1996
Total Pages: 546
ISBN-13:
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Publisher: Academic Press
Published: 2020-10-31
Total Pages: 350
ISBN-13: 0128215224
DOWNLOAD EBOOKAdvances in Polymer Reaction Engineering, Volume 56 in the Advances in Chemical Engineering series is aimed at reporting the latest advances in the field of polymer synthesis. Chapters in this new release include Polymer reaction engineering and composition control in free radical copolymers, Reactor control and on-line process monitoring in free radical emulsion polymerization, Exploiting pulsed laser polymerization to retrieve intrinsic kinetic parameters in radical polymerization, 3D printing in chemical engineering, Renewable source monomers in waterborne polymer dispersions, Importance of models and digitalization in Polymer Reaction Engineering, Recent Advances in Modelling of Radical Polymerization, and more. Covers recent advances in the control and monitoring of polymerization processes and in reactor configurations Provides modelling of polymerization reactions and up-to-date approaches to estimate reaction rate constants Includes authoritative opinions from experts in academia and industry
Author: Enrique Saldívar
Publisher:
Published: 1996
Total Pages: 488
ISBN-13:
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