In this work, a design equation was presented for a batch-recirculated photoreactor composed of a packed bed reactor (PBR) with immobilised TiO2-P25 nanoparticle thin films on glass beads, and a continuous-flow stirred tank (CFST). The photoreactor was studied in order to remove C.I. Acid Orange 7 (AO7), a monoazo anionic dye from textile industry, by means of UV/TiO2 process. The effect of different operational parameters such as the initial concentration of contaminant, the volume of solution in CFST, the volumetric flow rate of liquid, and the power of light source in the removal efficiency were examined. A rate equation for the removal of AO7 is obtained by mathematical kinetic modelling. The results of reaction kinetic analysis indicate the conformity of removal kinetics with Langmuir-Hinshelwood model (kL-H = 0.74 mg L-1 min-1, Kads = 0.081 mg-1 L). The represented design equation obtained from mathematical kinetic modelling can properly predict the removal rate constant of the contaminant under different operational conditions (R2 = 0.963). Thus the calculated and experimental results are in good agreement with each other.

JO - Chemical and Process Engineering L1 - http://rhis.czasopisma.pan.pl/Content/85033/PDF/01-paper-Sheidaei.pdf L2 - http://rhis.czasopisma.pan.pl/Content/85033 IS - No 2 June EP - 133 KW - heterogeneous photocatalysis KW - batch-recirculated photoreactor KW - design equation KW - mathematical kinetic modelling KW - TiO2-P25 nanoparticles KW - C.I. Acid Orange 7 ER - A1 - Sheidaei, Behnaz A1 - Behnajady, Mohammad A. PB - Polish Academy of Sciences Committee of Chemical and Process Engineering JF - Chemical and Process Engineering SP - 125 T1 - Mathematical Kinetic Modelling and Representing Design Equation for a Packed Photoreactor with Immobilised TiO2-P25 Nanoparticles on Glass Beads in the Removal of C.I. Acid Orange 7 UR - http://rhis.czasopisma.pan.pl/dlibra/docmetadata?id=85033 DOI - 10.1515/cpe-2015-0010