This document discusses gas desulfurization via electrochemical membranes. It introduces electrochemical membrane separation as a highly selective and efficient process that occurs through the application of a voltage gradient, which destroys contaminant species. Typical membrane gas separations are explained, with molecular sieves used to remove H2S based on pore size selectivity. The process overview describes sour gas passing through a cathode into a membrane, transporting sulfide ions to the anode where an oxidation reaction produces oxidized sulfide ions. Experimental results show over 80% efficiency for removing H2S from coal gas at various conditions.
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