In line monitoring of residual monomer by nir spectroscopy during styrene-divinylbenzene solution polymerization reactions

Dennis Chicoma Lara, María Verónica Carranza Oropeza, Leandro Gonçalves De Aguiar, Reinaldo Giudici

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

In this work, the sensitivity of NIR spectroscopy was studied for in-line, in-situ monitoring of residual monomer concentrations in solution copolymerization of styrene and divinylbenzene (S-DVB). Reactions were carried out in a glass reactor (stirred tank) to gather data used to develop a NIR calibration model. Experimental data were collected via off-line measurements of monomer conversion by gravimetry and they were previously validated with a kinetic model of the process. These data were correlated with the NIR spectra collected by an immersion probe (transflectance mode) during the reaction at the same sampling times. Spectral changes in the ranges 4460-4750 cm-1 6212-6187 cm-1 were related to the variations of monomer concentration. The results show good agreement between the experimental data and in-line monitoring predictions from the NIR spectra and the calibration model.

Original languageEnglish
Title of host publicationCatalysis and Reaction Engineering Division - Core Programming Topic at the 2011 AIChE Annual Meeting
PublisherAIChE
Pages1143-1148
Number of pages6
ISBN (Print)9781618397393
StatePublished - 2011
EventCatalysis and Reaction Engineering Division - Core Programming Topic at the 2011 AIChE Annual Meeting - Minneapolis, United States
Duration: 16 Oct 201121 Oct 2011

Publication series

NameCatalysis and Reaction Engineering Division - Core Programming Topic at the 2011 AIChE Annual Meeting
Volume2

Conference

ConferenceCatalysis and Reaction Engineering Division - Core Programming Topic at the 2011 AIChE Annual Meeting
CountryUnited States
CityMinneapolis
Period16/10/1121/10/11

Bibliographical note

Funding Information:
The financial support from FAPESP (Fundação de Amparo à Pesquisa do Estado de São Paulo) and CNPq (Conselho Nacional de Desenvolvimento Científico e Tecnológico) is gratefully appreciated. The authors also thank BASF Brazil for providing monomer.

Publisher Copyright:
© 2011 by AIChE. All rights reserved.

Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.

Keywords

  • Chemical reactions
  • In line monitoring
  • NIR spectroscopy
  • Polymers

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