Application of photo-impinging streams reactor in degradation of phenol in aqueous phase

The main aim of this study was to utilize an impinging streams reactor as a novel procedure in photocatalytic degradation of phenol using Degussa P25 TiO2 nano particles as the reaction catalyst under UV radiation. The results demonstrated the improved performance of the present reactor in comparison with the conventional apparatus. In addition, the role of dissolved oxygen, in the photocatalytic degradation of phenol was investigated. This was achieved by applying either air or nitrogen as the spray gas in pneumatic nozzles. Replacement of air with nitrogen as the spray gas almost halted the photocatalytic degradation of phenol. Finally, a modified kinetic model was presented for this process.