| Abstract
| - A novel, thin-film, slurry “fountain” photocatalytic reactor for water treatment and purificationis presented. The novelty of the reactor centers on the design of a special nozzle through whichwater is pumped to create a thin film. The film emerges from the nozzle in the shape of a smoothand radially expanding water fountain. A radiation source (solar or UV lamps) is situated abovethe fountain. Two dimensionless mathematical models for the photoreactora flat fountain modeland a parabolic fountain modeland simulation results under a number of different conditionsincluding the effects of nozzle setting (radius, aperture, and angle), flow rate, and light scatteringare presented. The model simulations suggest that optimal photoreactor design is given byfountains with large surface areas. Photocatalysts with scattering albedos smaller than 0.3 resultin optimal photoreactor performance. The models presented may be used as a tool for the design,scale-up, and optimization of these types of reactors.
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