(283b) Theoretical Study of Photocatalytic Water Splitting in a Tube-in-Tube Setup

Tube-in-tube setup has been employed for many reactions and processes in flow. The setup uses Teflon AF-2400 tubing as an inner tubing while the outer tubing is non-permeable. This allows gas-liquid reactions, such as hydrogenation, to occur in flow without the two phases contacting directly. Alternatively, it can be used to remove gas from liquid. In this work, we modeled mass transfer of hydrogen production in flow via photocatalytic reaction. The models were formulated from a simple case (without reaction) to a complicated case (with photocatalytic reaction kinetics), and solved analytically and numerically. This work offered insights into a potential use of the tube-in-tube setup for hydrogen production in continuous-flow mode and influence of processing conditions.