Performance Analysis of Three Controllers for the Polymerisation of Styrene in a Batch Reactor
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Emmanuel E Ekpo
The performance analysis of three advanced non linear controllers is the main focus of this paper. All three controllers are applied for the control of a batch polymerisation reactor which is defined by a very simple kinetic model for the polymerisation of styrene. This simple set of equations describing the polymerisation process is first solved using the sequential strategy i.e. Control Vector Parameterisation (CVP) technique within gPROMS to find optimal initial initiator concentrations and the reactor temperature trajectory necessary to yield desired polymer molecular properties (defined here as fixed values of monomer conversion and number average chain length) in minimum time. The sequential solution strategy has had limited application in solving optimisation problems for polymerisation in batch reactors, most researchers instead employing the Pontryagin's Maximum Principle (PMP) to solve optimal control problems involving these systems.The temperature trajectory obtained from the dynamic optimisation is used as the setpoint to be tracked by the three controllers: Dual Mode control with PID, which is representative of industrial practice, Generic Model Control (GMC) with Neural Networks as online heat release estimator, and Direct Inverse Control (DIC). Published work on the last two controllers as applied to the control of a batch polymerisation reactor is absent from the literature.When the performances of the different controllers are evaluated, it is seen that the GMC-NN controller performs better than the other two for the system under consideration.
©2011 Walter de Gruyter GmbH & Co. KG, Berlin/Boston
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Articles in the same Issue
- Review
- A Generalized Kinetic Model for Hydrometallurgical Processes
- Advanced Modeling of Reactive Separation Units with Structured Packings
- Applications of Computational Fluid Dynamics (CFD) Tools for Gravity Concentrators in Coal Preparation
- Article
- CFD Diagnosis of the Cyclotol Manufacturing Plant: Product Quality and Process Operation
- Performance Analysis of Three Controllers for the Polymerisation of Styrene in a Batch Reactor
- Enhanced Explicit Scheme to Solve Transient Heat Conduction Problem
- Analysis and Simulation of Cross-Flow Reactor for Ethylene Epoxidation
- Learning to Control pH Processes at Multiple Time Scales: Performance Assessment in a Laboratory Plant
- Estimating Output Variance in Closed Loop Systems
- CFD Simulations for Continuous Flow of Bubbles through Gas-Liquid Columns: Application of VOF Method
- Inference of Chemical Reaction Networks Using Hybrid S-system Models
- Optimization of the Variable Reflux Ratio in a Batch Distillation Column through a Heuristic Method
- Spatial and Temporal Resolution in Data-Driven Process Modeling of an Integrated Newsprint Mill
