ELECTROLYSIS OF WEAK BLACK LIQUOR .2. EFFECT OF PROCESS PARAMETERS ONTHE ENERGY EFFICIENCY OF THE ELECTROLYTIC CELL

laboratory study of the effects of process parameters on the performan ce of weak black liquor (WBL) electrolysis cells showed that anode mat erial, current density and temperature are critical to the operation. The two latter variables showed an interaction effect upon the operati on of the cell. In terms of energy efficiency, the IrO2 anode performe d better than the Pt anode. The addition of sodium sulfate to the WBL was beneficial to the energy efficiency. No chlorine gas was produced when electrolyzing WBL containing sodium chloride within the pH range 5.4 to 13.