January 12, 2016
Editors' Choice: Photochemical Microreactors
Organic photochemistry achieves selective transformations with high chemical and quantum yields, and in many cases without chemical activation. Since photons can be regarded as a traceless reagent, photochemistry is considered as a green methodology par excellence. Nevertheless, it has not found widespread implementations in the chemical industry since currently available technology suffers from process limitations due to the uncontrolled coupling between hydrodynamics, radiative transfer, mass transfer, and photochemical kinetics. Over the last decades, continuous microstructured technologies have emerged as alternatives to the batch process, improving reaction outcomes. T. Aillet et al. show how microreactors can also be used as a tool for acquiring kinetic data on photochemical reactions. For illustration, a T-photochromic system was considered, involving a reversible reaction between a closed and an open form of TMINBPS. After the kinetic parameters were known, the photochromic reaction was carried out in two other microreactors, showing that a critical residence time existed beyond which the conversion into the open form decreased and thus, its decomposition occurred. The differences observed in terms of critical residence times between both microreactors were explained due to a modeling approach.
T. Aillet, K. Loubière, O. Dechy-Cabaret, L. Prat
Microreactors as a Tool for Acquiring Kinetic Data on Photochemical Reactions
Chem. Eng. Technol. 2016, 39 (1), 115–122.