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Membranes 2018, 8(3), 74; https://doi.org/10.3390/membranes8030074

On-Line NIR to Regulate Pervaporation Process: Application for Dehydration

1
Aix-Marseille Université, CNRS, Centrale Marseille, M2P2 UMR 7340, Equipe Procédés Membranaires (EPM), Europôle de l’Arbois, BP80, Pavillon Laennec, Hall C, 13545 Aix-en-Provence CEDEX, France
2
SANOFI, Chemin de Meteline, 04200 Sisteron, France
*
Author to whom correspondence should be addressed.
Received: 6 August 2018 / Revised: 21 August 2018 / Accepted: 21 August 2018 / Published: 4 September 2018
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Abstract

The regeneration of volatile organic solvents via dehydration tests, from 90 wt %, was evaluated by pervaporation using an on-line near-infrared (NIR) spectrometer. Experiments were performed using a bis(triethoxysilyl)methane (BTESM)-based ceramic HybSi® membrane at temperatures of 20, 30 and 40 °C. The presence of an on-line NIR allows continuous monitoring of the process without sampling, and quickly estimates mass fractions of species in the retentate. Dehydration tests were performed at 30 °C in order to confirm the on-line NIR reproducibility, and closely matched results obtained with an off-line densimeter. These results validated the usefulness of the on-line NIR and provided the same precision whatever the mass fraction in the retentate. A good on-line reproducibility was found, with an agreement between the on-line NIR and off-line densimeter, obtaining an average deviation of ±0.058 wt %, ±0.17 wt % and ±0.049 wt %, respectively, at 20, 30 and 40 °C. View Full-Text
Keywords: on-line near-infrared spectroscopy; pervaporation; HybSi® membrane; organic purification on-line near-infrared spectroscopy; pervaporation; HybSi® membrane; organic purification
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La Rocca, T.; Carretier, E.; Clair, T.; Etienne, M.; Moulin, P. On-Line NIR to Regulate Pervaporation Process: Application for Dehydration. Membranes 2018, 8, 74.

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