The pervaporation unit used consisted of a removable permeation module made of polyvinyl chloride (PVC) of 0.2 m internal
diameter containing 50 dense hollow polydimethylsiloxane(PDMS) membranes (di = 0.6 mm and de = 1 mm), 0.25 m in length,covering an area of 0.04 m2. This is a hydrophobic commercial membrane, with the membrane and module built by a Brazilian company (PAM-Membranas Selectivas).