A class of discontinuous dynamical systems II. An industrial slurry high density polyethylene reactor

A lumped parameter model of an industrial HDPE reactor is presented. Discontinuity in the mode of operation makes either a set of 15 DAEs or a set of 12 DAEs applicable to this system at any instant. The reactor switches back and forth from one model to another reaching a time averaged steady state....

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Bibliographic Details
Published in:Chemical engineering science 2001-06, Vol.56 (11), p.3611-3621
Main Authors: Moudgalya, Kannan M, Jaguste, Shubhangi
Format: Article
Language:English
Subjects:
Applications of mathematics to chemical engineering. Modeling. Simulation. Optimization
Applied sciences
Chemical engineering
Chemical reactors
Differential algebraic equations
Discontinuous systems
Dynamic simulation
Exact sciences and technology
Mathematical modelling
Organic polymers
Physicochemistry of polymers
Polymerisation
Polymerization
Preparation, kinetics, thermodynamics, mechanism and catalysts
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Summary:A lumped parameter model of an industrial HDPE reactor is presented. Discontinuity in the mode of operation makes either a set of 15 DAEs or a set of 12 DAEs applicable to this system at any instant. The reactor switches back and forth from one model to another reaching a time averaged steady state. The DAEs are integrated by DASSL. Using the Box-Complex procedure, the sum of squares of errors between plant data and model prediction is minimised and the model tuned. The tuned parameters agree with the literature values. Sensitivity analysis of the model shows that manipulation of pressure will yield a faster change in the reactor conditions as compared to manipulating the catalyst feed rate.
ISSN:0009-2509
1873-4405
DOI:10.1016/S0009-2509(01)00044-6