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.
|Title of host publication||Catalysis and Reaction Engineering Division - Core Programming Topic at the 2011 AIChE Annual Meeting|
|Number of pages||6|
|State||Published - 2011|
|Event||Catalysis and Reaction Engineering Division - Core Programming Topic at the 2011 AIChE Annual Meeting - Minneapolis, United States|
Duration: 16 Oct 2011 → 21 Oct 2011
|Name||Catalysis and Reaction Engineering Division - Core Programming Topic at the 2011 AIChE Annual Meeting|
|Conference||Catalysis and Reaction Engineering Division - Core Programming Topic at the 2011 AIChE Annual Meeting|
|Period||16/10/11 → 21/10/11|
Bibliographical noteFunding 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.
© 2011 by AIChE. All rights reserved.
- Chemical reactions
- In line monitoring
- NIR spectroscopy