Fig. 5: EChem-SOR for valorization of H2S in natural gas using a 100-cm2 flow reactor.
From: Electrochemical valorization of H2S in natural gas to sulfate under mild conditions
a Schematic illustration of continuous H2S capture and K2SO4 production from a H2S-involved (100,000 ppm) natural gas via EChem-SOR system that enables nearly complete capture H2S and highly efficient K2SO4 production. The system comprises a simulated natural gas, a flow reactor, a gas-liquid separator filled with 1 M KOH, and a crystallizer. b A 100-h stability test of EChem-SOR system using 100-cm2 flow reactor at 5 A and 300 ml min−1 of 10 vol% H2S/CH4, with refreshing the catholyte daily for maintaining the alkaline environment to capture H2S. H2Scap conversion (left in c), H2S concentration in tail gas (right in c), K2SO4 selectivity (left in d), e−-to-sulfate efficiency (left in d), and accumulated K2SO4 mass (right in d) detected at different time points.
