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Continuous production of polystyrene in a tubular reactor: Part II

✍ Scribed by J. P. A. Wallis; R. A. Ritter; H. Andre

Publisher
American Institute of Chemical Engineers
Year
1975
Tongue
English
Weight
798 KB
Volume
21
Category
Article
ISSN
0001-1541

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✦ Synopsis

Abstract

An analysis of the bulk polymerization of styrene by azobisisobutyronitrile in a tubular reactor was made. Rigorous models were developed and verified. A diffusion model gave predictions of molecular weights and conversions that were 2% higher on the average than the experimental values. Another model, a plug flow contraction of the diffusion model, predicted molecular weights and conversions that were 6% higher on the average than the experimental values.

The diffusion model showed that optimal conversions could be obtained by proper reactor operation. Tentative studies for optimal conversion with minimal molecular weight dispersion indicated the reactor should be operated at a wall temperature 5Β° to 10Β°C below that required for optimal conversion.

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x = axial coordinate y Greek Letters = distance from pipe wall distance between correlation points longitudinal microscale (in axial direction) density kinematic viscosity delay time shear stress at the wall LITERATURE CITED 1. Hershey, H. C., Ph.D. thesis, Univ. Missouri at RoIla