Fig. 7: Extending EChem-SOR system for H2SO4 solution production using a 100-cm2 SE flow reactor.
From: Electrochemical valorization of H2S in natural gas to sulfate under mild conditions
a Schematic illustration of the reaction pathway in SE flow reactor for H2SO4 production. The SE flow reactor comprises an OCNT/DGL cathode, IrRuOx/Ti anode, anion exchange membrane (AEM), proton exchange membrane (PEM), and middle SE layer filled with H+-conducting ion exchange resin. b H2SO4 production and e−-to-sulfate efficiency of EChem-SOR system at 5 A with different H2S/CH4 flow rate. c Long-term stability test at 5 A and 60 ml min−1 of 10% H2S/CH4. After every 10-h electrolysis (50 h in total), the SE layer was chemically rinsed by Na2SO3 solution to remove deposited S without the need to disassemble the reactor (for 2 h, without applying a current). The right axis represents the corresponding H2SO4 concentration and e−-to-sulfate efficiency in each electrolysis period.
