الفهرس 
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Abstract
This thesis discusses the photocatalytic oxidation and degradation of Methanol using TiO2 particles / 254 nm UV lamp in a slurry type reactor in which the fine catalyst particles are suspended in the solution. Moreover, the effects of several process parameters such as Methanol initial concentration, TiO2 loading, initial pH of solution, and superficial liquid velocity on the photo-degradation reaction were studied to achieve maximum degradation efficiency. The solution COD was traced to measure the degradation process by being measured at various time intervals during the experiment duration. The results illustrated that the COD reduction percent increases with increasing the superficial liquid velocity however decreases with increasing the solution pH or the Methanol initial concentration. Furthermore, the COD reduction percent increases with increasing TiO2 loading up to 1.5 g/l then decreases with any further increase in the amount of TiO2. The maximum COD reduction percent was 77.5 % at 10 ppm, pH = 1, catalyst loading 1.5 g/l and superficial liquid velocity of 1.92 cm/s. The reaction order was determined utilizing Lagergren‘s rate equation and the linear pseudo second order reaction equation in which the reaction was found to be pseudo second order reaction.