polymer membrane is needed that will carry the hydrogen ions from the anode to the cathode without passing the electrons
PERFLUOROSULFONIC ACID PROTON EXCHANGE MEMBRANE(PFSAPEM)
Membranes with sacrificial thread channels, with low cell voltage, for 30-34% NaOH production,
suitable for high current density cells. DF2801 membrane has better tolerance for impurities in feeding brine.
The cross-section of the membrane:
Laboratory Test Performance of Dongyue series Membranes*
membrane |
Current density(kA/m2) |
Cell voltage (V) |
Current efficiency (%) |
kWh/tNaOH |
DF988 | 3.5 | ~3.2 | >95% | ~2250 |
DF2801 | 4.5 | 3.0-3.2 | >95% | ~2150 |
*All test performed in lab cells with 50 effective area, at 3.5 or 4.5kA/m2 current density, 32% NaOH,
205g/L NaCl concentration (outlet), 85-90°C electrolyte temperature, 1mm elelctrode gap and activated cathode.
