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Photooxygenation in an advanced led-driven flow reactor module: experimental investigations and modelling

Radjagobalou, Robbie and Blanco, Jean-François and Dechy-Cabaret, Odile and Oelgemöller, Michael and Loubière, Karine Photooxygenation in an advanced led-driven flow reactor module: experimental investigations and modelling. (2018) Chemical Engineering and Processing, 130. 214-228. ISSN 0255-2701

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Official URL: https://doi.org/10.1016/j.cep.2018.05.015


The photooxygenation of  α-terpinene was investigated as a benchmark reaction in an advanced LED-driven flow reactor module, both from an experimental and modelling point of view. Ethanol was used as a green solvent and rose Bengal was chosen as a cheap sensitizer of industrial importance. Firstly, the kinetic law based on all mechanistic steps was established for the chosen photooxygenation. From this, the set of operating parameters potentially influencing the photoreaction rate were identified. Subsequently, experiments were carried out under continuous-flow conditions to screen these operating parameters, namely concentration of α-terpinene, concentration of photosensitizer, residence time, structure of the segmented gas-liquid flow and nature of the reagent gas phase (air versus pure oxygen). Finally, the conditions enabling minimization of sensitizer bleaching were established. It was also shown that the hydrodynamic characteristics of the gas-liquid flow can have an effect on the conversion levels. From this, a simplified model was proposed to predict the conversion at the reactor’s outlet when pure oxygen was used.

Item Type:Article
HAL Id:hal-01949855
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Université de Toulouse > Institut National Polytechnique de Toulouse - Toulouse INP (FRANCE)
Other partners > James Cook University - JCU (AUSTRALIA)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UT3 (FRANCE)
Laboratory name:
Deposited On:09 Jan 2019 11:21

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