Pervaporation: Example of module operation

Pv Ex $3$: Experimental data for the pervaporation of liquid mixtures of ethanol and water at a feed temperature of $60C$ and

a permeate pressure of $15\mathrm{.}2mmHg,$ using a commercial polyvinylalcohol membrane were measured. A total permeation

flux of $1\mathrm{.}6k\frac{g}{m^2}-h$ for a $17\mathrm{.}0wt\%$ ethanol in water feed, giving a permeate of $12wt\%$ ethanol. Calculate the permeances of

ethyl alcohol and water for these conditions. Also, calculate the selectivity for water.

Data: vapor pressures $60$C p$($h$2$o$)$ p$($Ethanol$)352$ mmhg as pure compnenets