The ultimate goal of the project is realization of a microreactor applied for water purification employing photocatalytic reaction technique (oxidation) and hydrogenation of nitride (reduction). The combination of these steps are believed to remove all contaminants form drinking water. In this project, specifically, we pursue the design and micro fabrication of an optimized microreactor which meets all the requirements of the photocatalytic reactions. For instance, photon transport is a problematic issue in the macro reactors when it comes to photo catalytic reactions, which is believed to be largely reduced by using the microreactor. High surface to volume ratio, intensified mass and heat transfer, their operation under laminar flow and controllability of light source which leads to loss minimization, are only few advantages of microreactors to mention. Furthermore, the effect of different light sources with different wavelengths, and their corresponding catalysts on photo-induced oxidation will be investigated. The combination of sidelight emitting fibers with hollow fiber based catalyst supports will be also studied. As a bench mark the mass and photon transport will be numerically simulated and compared with the design.
Figure 1. A Photocatalytic microreactor PMMA (courtesy of Can Aran)