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A two-dimensional - two-directional mathematical model of the radiation field inside a flat-plate, photocatalytic reactor has been developed. The slurry-type reactor is irradiated by two tubular UV lamps with the aid of two parabolic reflectors. Resorting to information about the reactor dimensions, the lamp and reflector characteristics, and the catalyst optical properties and concentration, the solution of the mathematical model provides a detailed description of the rate of absorbed radiation energy at each point inside the reactor. The radiation distribution inside the reactor was verified by computing the radiation flux coming out of the reactor at the opposite face of the radiation entrance. These radiation fluxes were compared with experimental measurements made with a UV radiometer and good agreement was obtained; the maximum observed error was 12%. When the catalyst concentration was increased, a significant decrease of the radiation flux leaving the reactor was also observed.

journal of advanced oxidation technologies

UV Radiation Distribution in A Flat-Plate Photocatalytic Reactor with Suspended Particles of Titanium Dioxide. Mathematical Model and Experimental Verification