| 초록 |
A salinity gradient power (SGP) system holds a great potential to generate continuous and clean electricity for 24 hours. Because the fundamental energy of SGP is the concentration different (i.e., osmotic pressure difference), various groups have been trying to develop the power density using various salty sources, based on a Van’t Hoff equation. This study demonstrates the membrane structure design to improve power density of pressure retarded osmosis (PRO) systems. Hydrophilic PES (polyethersulfone) porous membrane was fabricated by non-solvent induced phase separation. On them, polyamide layers were coated by interfacial polymerization. The polyamide thin-film composite membrane has 12 W/m2 under 20 bar using 1 M NaCl and distilled water. |
