THE KINETICS OF PHOTOCATALYTIC DEGRADATION OF TRICHLOROETHYLENE IN GAS-PHASE OVER TIO2 SUPPORTED ON GLASS BEAD

In this investigation, a packed bed filled with coated titanium dioxid e glass beads to study the kinetics of photocatalytic degradation of t richloroethylene under irradiation of 365 nm UV light. In the range of 100-500 ml/min of flowrate, the reaction rate for 6 mu M TCE increase d with an increasing flowrate upto 300 ml/min, while was not affected by the flowrate at the values higher than 300 ml/min. For moisture in the range of 9.4-1222.2 mu M, the reaction rate of TCE was decreased w ith an increasing humidity. The adsorbed water on the catalyst surface could compete with the adsorption of TCE on the sites. The reaction r ate of 6 mu M TCE increased as the Light intensity increased, and was proportional to the 0.61 order of the light intensity. Among the three L-H bimolecular form models, the experimental data had the best fit f or one of models: r = k[K1Cr/(1 + K1Cr + K2Cw)][K4Cw/(1 + K3Cr + K4Cw) ] (C) 1998 Elsevier Science B.V. All rights reserved.