From Figure 4.6 until figure 4.11. It is known that the process of pervaporation ethanol-water at a temperature of 70 ° C was given the value of flux and selectivity. The optimum temperature compared with the others. This is apparently supported also by the ethanol content.
4.3. Effect of Time in the Flux Ethanol concentration in the permeate as a function of time is shown in figure 4.4. However, the result of a mixture pervaporation process ethanol-water did not give a significant increase in the concentration of ethanol in the permeate. Fig. 4.12. The effect of times on flux for various of membrane composition and various of ethanol-water mixer (30%-70%) Fig. 4.13. The effect of times on flux for various of membrane composition and various of ethanol-water mixer (50%-50%) Fig. 4.14. The effect of times on flux for various of membrane composition and various of ethanol-water mixer