A Study on the Photodecomposition of Active Dye in a Baffled Fixed-Bed Reactor

The influence of dynamic parameters on the photodecomposition of active brilliant red X-3B in aqueous solution was studied using a baffled fixed-bed photoreactor. The results indicated that the per pass conversion (x) increased linearly with increasing light intensity (I ₀), packed density of supported photocatalyst (N), and flow rate (Q). The slopes of the x–I₀, x–N, and x–Q curves were 0.0288, 0.0392, and 0.00825 respectively. The different slopes of the x–I₀, x–N, and x–Q curves suggestted that the photocatalytic decomposition rate of the active brilliant red X-3B in aqueous solution was largely dependent on the light intensity and catalyst packing density and less dependent on the flow rate.