A revised 1D equivalent model for the determination of incident photon flux density in a continuous-flow LED-driven spiral-shaped microreactor using the actinometry method with Reinecke’s salt

Continuous-flow microstructured technologies are now recognized as promising alternatives to batch processing for organic photochemistry, especially when light emitting diodes (LEDs) employed sources. To evaluate and optimize productivity energetic efficiency, the knowledge of incident photon flux density is crucial. In this context, objectives present work dual: first, transfer classical actinometry method with Reinecke’s salt a continuous-flow LED-driven spiral-shaped reactor second, propose revised one-dimensional equivalent model accurate determination in microreactor. Experimental measurements were carried out under controlled conditions. The effects spectral domain radiant power emitted, tubing length, presence gas-liquid Taylor flow, material support plate investigated. An expression was established Cartesian model, taking into account diffuse emission LED array reflection induced by which inserted (i.e. backside microreactor wall). way, could be estimated an acceptable level accuracy, not case if usual 1D applied (collimated no reflection).