Modelling approaches to predict light absorption in gas-liquid flow photosensitized oxidations

The photosensitized production of singlet oxygen is a benchmark reaction for characterizing flow photoreactors. Light absorption the driving force photooxidation and modelling represents fast cost-efficient method its prediction optimization. In this study, we report two models photon in single- two-phase flow. Firstly, three-dimensional ray tracing model was developed validated by experimental 9,10-dimethylanthracene (DMA) presence Rose Bengal. By comparing simulated DMA conversion, illumination conditions affected mass transfer limitations liquid gas–liquid Taylor flows were identified. Furthermore, used to compare light Taylor, annular, bubbly configurations. At low attenuation coefficient 2.3 cm?1 minor difference between patterns observed irrespective hold-up. same hold-up 26 200 cm?1, relative volumetric absorbed flux strongly depends on pattern. Secondly, as reference develop simplified which only requires geometry optical properties multiphase novel predictive based geometrical approximation pathlength slugs, film volume next bubble caps. As it minimum computational power provides good accuracy, geometry-based has potential assist future automated optimization photooxidations.