Fig. 6: Sustainability and economic evaluation of EChem-SOR system.
From: Electrochemical valorization of H2S in natural gas to sulfate under mild conditions
Roadmap to reducing GWP for K2SO4 production (a) and H2S removal (b) in the base case through progressive optimization of carbon emission-relevant parameters. c Sensitivity analysis of various single-variables (current density, e−-to-sulfate efficiency, electricity price and KOH price) on the production cost per kg K2SO4. The base point of relative change was chosen at a current density of 50 mA cm−2, e−-to-sulfate efficiency of 84%, electricity price of 0.03 $ kWh−1, KOH price of 0.38 $ kg−1. d A contour map for the total K2SO4 production costs in EChem-SOR system with respect to the different current densities and e−-to-sulfate efficiencies. The dotted line represents the breakeven line at current market price of 0.5 $ per kg K2SO4. The direction of the arrow represents the profitable region. All other parameters were fixed as the base point parameters in (c).
