Modeling and analysis of a gas sweeping process for polycarbonate polymerization

Dae Hyung Kim, Kyoung S. Ha, Hyun K. Rhee, Kwang Ho Song

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

This article deals with (1) the development of a mathematical model for the finishing polycarbonate polymerization process with a horizontal, rotating disk-type reactor with countercurrent gas sweeping and (2) the performance analysis of the reactor system with the model. We propose a model describing a reactor system consisting of two phases in which the byproduct (phenol) is removed from the polymer melt phase to the countercurrently flowing vapor phase to facilitate the forward reaction and, therefore, produce a high molecular weight polymer compatible with the products of commercial grades. The vapor phase is represented by the tanks-in-series model, whereas the polymer melt phase is regarded as a plug flow reactor. The major concerns here are the influences of the reactor operating conditions, including the catalyst concentration, reaction temperature, mass-transfer rate, melt-phase residence time, and vapor-phase velocity, on the polymer molecular weight, the melt-phase concentrations of various components, and the molar fraction of phenol in the vapor phase. To corroborate the validity of the proposed model and investigate the complex phenomena of the process, we have conducted a series of simulation studies with various operating policies, and we compare the performance of the process with the performances of the cocurrent process and the vacuum process. According to the results of this study, this new type of reactor system shows satisfactory performance and is sometimes even better than the conventional high-vacuum process.

Original languageEnglish
Pages (from-to)1010-1021
Number of pages12
JournalJournal of Applied Polymer Science
Volume88
Issue number4
DOIs
Publication statusPublished - 2003 Apr 25
Externally publishedYes

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polycarbonate
Polycarbonates
Gases
Vapors
Polymerization
Polymer melts
Phenol
Phenols
Polymers
Molecular weight
Vacuum
Phase velocity
Rotating disks
Byproducts
Mass transfer
Mathematical models
Catalysts

ASJC Scopus subject areas

  • Polymers and Plastics

Cite this

Modeling and analysis of a gas sweeping process for polycarbonate polymerization. / Kim, Dae Hyung; Ha, Kyoung S.; Rhee, Hyun K.; Song, Kwang Ho.

In: Journal of Applied Polymer Science, Vol. 88, No. 4, 25.04.2003, p. 1010-1021.

Research output: Contribution to journalArticle

Kim, Dae Hyung ; Ha, Kyoung S. ; Rhee, Hyun K. ; Song, Kwang Ho. / Modeling and analysis of a gas sweeping process for polycarbonate polymerization. In: Journal of Applied Polymer Science. 2003 ; Vol. 88, No. 4. pp. 1010-1021.
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