Abstract
The degradations of trace hexane in the gas phase by O 3/UV, TiO 2/UV and O 3/TiO 2/UV were studied. The effects of the flow rate, inlet concentration of hexane, water vapor concentration and ozone dosage on the conversion of hexane in the three processes were investigated, respectively. The experimental results showed that the addition of ozone significantly increase photocatalytic degradation of hexane. The reaction rates of hexane by O 3/UV and O 3/TiO 2/UV increased linearly with an increase of ozone addition, which increased faster in O 3/UV than in O 3/TiO 2/UV. L–H bimolecular model was successfully used to correlate photocatalytic reaction rate data under various hexane and water vapor concentrations. A new model combining L–H model and ozone photolysis was developed to correlate reaction rate data of hexane in O 3/TiO 2/UV.
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