While the throughput of a single microreactor is quite low, various scale up strategies, e.g. using longer operation times, external and internal numbering up, can be used to bring the throughputs closer to industrial scale. There are however, challenges associated with each scale up strategy, i.e. higher pressure drops, need for multiple autonomous reaction systems, and the issues with flow maldistribution, respectively . Nonetheless, microreactors have been widely investigated for photocatalytic systems . In addition other reactor designs such as tube reactors , plate-based reactors , a vortex reactor , gas phase reactors and rotating disk reactors have also been tested for photochemistry. It should be noted for these rotating disk reactors, the operating principle relies on the formation of a thin film to intensify mass transfer and heat transfer rates. Due to the formation of such a thin film, only low throughputs were achieved. In contrast, the reactor described in this work, the rotor-stator spinning disk reactor relies on generating intense turbulence in an enclosed housing to intensify mass and heat transfer rates. Scaling up of such reactors have mostly focused on single phase liquid reactions as gas-liquid systems are traditionally more challenging. In 2016, a collaboration between Knowles and Merck led to the development of a photo-redox-mediated indoline dehydrogenation for the synthesis of Elbasvir, a compound used for the treatment of chronic hepatitis . They achieved 100 g of product within 5 hours for this radical chain reaction. In the same year, Stephenson et al. were able to produce 0.5 kg•day -1 of a fluorinated compound . In 2018, Booker-Milburn et al. obtained