Contributions to the Ohmic Drop in the Electrolysis of ZnCl2 in a Molten Chloride Electrolyte |
| |
Authors: | SC Lans A Van Sandwijk MA Reuter |
| |
Affiliation: | (1) Applied Earth Sciences - Resources Engineering, Delft University of Technology, Mijnbouwstraat 120, 2628 RX, Delft, The Netherlands |
| |
Abstract: | The electrowinning of zinc from zinc chloride with a molten chloride electrolyte was investigated. The electrolysis of zinc chloride shows ohmic limitations. The energy consumption is to a large extent determined by the anodic reaction, the evolution of chlorine. The chlorine gas plume was visualised in a see-through furnace and images were analysed to determine the plume angle. This parameter serves as an input parameter for a model to determine the ohmic contributions of the electrolyte, the plume and a layer of chlorine bubbles sticking to the anode, as well as the plume velocity. The results indicate that the major contribution ( 60%) to the ohmic drop is due to a stagnant layer of bubbles growing and sticking to the anode, thereby decreasing the effective anode area by coverage. The plume velocity influences coverage characteristics to some extent, which influences the ohmic drop. |
| |
Keywords: | chlorine evolution electrowinning image analysis molten salt ohmic drop plume zinc |
本文献已被 SpringerLink 等数据库收录! |
|