Energy-efficient chlorine production by gas-phase HCl electrolysis with oxygen depolarized cathode |
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| Institution: | 1. Institute of Chemical Process Engineering, Clausthal University of Technology, Leibnizstr. 17, Clausthal-Zellerfeld 38678, Germany;2. Otto-von-Guericke University, Process Systems Engineering, Universitätsplatz 2, 39106 Magdeburg, Germany;3. Max-Planck Institute for Dynamics of Complex Technical Systems, Sandtorstrasse 1, 39106 Magdeburg, Germany |
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| Abstract: | For the first time, gas-phase electrolysis of HCl to chlorine was conducted in a fuel cell type reactor with an oxygen depolarized cathode. Very low cell voltages below ? 1 V at industrially relevant current densities of 4 kA m? 2 were obtained. Compared to technical HCl electrolysis processes, this leads to a reduction in electrical energy demand of approximately 30%. The temperature and the relative humidity (rH) of the cathode inlet gas were identified as key parameters controlling the overall performance of the system. |
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