Abstract
A small test cell has been designed to investigate the electrochemical removal and concentration of sulfur dioxide from stack gases. The cell is a high temperature molten-salt cell which uses the ternary eutectic of lithium, potassium and sodium sulfates as the electrolyte. Simulated flue-gas having a composition similar to that resulting from burning 3.5% sulfur coal is fed to the cathode, where sulfur dioxide and oxygen are converted to sulfate ion. At the anode, the reverse reaction occurs resulting in a small volume of gas containing up to 50% sulfur oxides.
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