Microreactors as a Tool for Acquiring Kinetic Data on Photochemical Reactions

For the first time, the application of microreactors as a tool for acquiring kinetic data on a photochemical reaction is demonstrated. For illustration, a T‐photochromic system is considered. By using modeling tools and carrying out specific experiments in a spiral‐shaped microreactor irradiated by...

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Bibliographic Details
Published in:Chemical engineering & technology 2016-01, Vol.39 (1), p.115-122
Main Authors: Aillet, Tristan, Loubière, Karine, Dechy-Cabaret, Odile, Prat, Laurent
Format: Article
Language:English
Subjects:
Arrays
Chemical and Process Engineering
Chemical engineering
Chemical Sciences
Engineering Sciences
Irradiation
Kinetic data acquisition
Light-emitting diodes
Mathematical models
Microreactor
Microreactors
Modelling
Photochemical reactions
Photochemistry
Photochromic system
Reaction kinetics
Ultraviolet/light-emitting diode
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Summary:For the first time, the application of microreactors as a tool for acquiring kinetic data on a photochemical reaction is demonstrated. For illustration, a T‐photochromic system is considered. By using modeling tools and carrying out specific experiments in a spiral‐shaped microreactor irradiated by an ultraviolet/light‐emitting diode (UV‐LED) array, the two kinetic parameters of the reaction, namely, quantum yield and rate of thermal back reaction, are determined. Once these parameters are known, the photochromic reaction is performed in two other microreactors in order to investigate a wider range of operating conditions. It is observed that a critical residence time exists beyond which the conversion into the open form decreases due to a decomposition reaction. The value of the critical residence depends on the microreactor type, which can be predicted by applying the model developed. Promising perspectives are presented the first time for the application of microreactors as a means for investigating photochemical reaction kinetics. A T‐photochromic system is considered as an example. Its kinetic parameters are determined by modeling tools and specific experiments in a spiral‐shaped microreactor irradiated by a UV/light‐emitting diode array.
ISSN:0930-7516
1521-4125
DOI:10.1002/ceat.201500163