Ethanol and benzene are separated in a network of distillation and membrane separation steps. In one step, a near-azeotropic liquid mixture of 10,000 kg/h of 25 %wt ethanol in benzene is fed to a pervaporation membrane consisting of an ionomeric film of perfluorosulfonic polymer cast on a Teflon support. The membrane is selective for ethanol, producing a vapor permeate containing 60 %wt ethanol, while the liquid retentate contains 90 %wt benzene. 1. Draw a flow diagram of the pervaporation process. Label the streams and indicate the physical state and components of each stream.  2. Determine the recovery of benzene in the retentate. 3. Determine the separation power (ethanol relative to benzene; permeate to retentate)

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