Abstract:
The objective of this research was to determine the recovery of trichloroethylen e and toluene using pervaporation process according to effect of feed temperature (40- 70 °C) and feed flow rate (3.3-25.1 liter/hr.). The study involved 2 stages. The first stage was the sorption test to provide a solubility of organic solution into the silicone. Secondly, the removal of trichloroethylene and toluene using pilot scale pervaporation process was conducted to evaluate; removal efficiency, permeate flux, permeabilit y, selectivity, and pervaporation separation index. Based on such factors and the solution diffusion model, the optimal condition then, was gained. Regarding the fom1er test, the result revealed that a solubility of trichloroethylene was more than that of toluene. The later experiment indicated that trichloroethylene and toluene removal were 98% and 97%, and the permeability of trichloroethylene and toluene were 7.2 X 10-9 and 7. 1 X 10-9 m²/hr. respectively. Also, the removal percentage and the permeability were both raised by increasing the temperature and feed flow rate . By contrast, the higher temperature resulted in decreasing the selectivity. This was probably due to the water flux was 2-3 times higher when increasing the temperature , in comparison to the organic flux which was 4-8 g/m2-hr . The optimal condition having the maximum pervaporation separation index were feed temperature at 50 °C and feed flow rate 25.1 liter/hr. In short, the removal of trichloroethylene was slightly higher than that of toluene. Moreover, the removal efficiency could be raised as a result of increasing temperature and feed flow rate.