Abstract
The desalination of sea water by pervaporation using RO membrane and porous PTFE membrane was examined. Results showed that product flux was well proportioned to vapor pressure difference of solution, and product water purity tended to increase with temperature in both membranes. For examples, product flux of 4.0kg/m2·hr, purity of 2.0μS/cm at 25°C and 20kg/m2·hr, 1.5μS/cm at 50°C, respectively, was obtained in RO membrane. Furthermore, desalination was tried by thermo-pervaporation using porous PTFE membrane, and it also produced almost the same results.
