Fig. 4 e The conversions, selectivities, SE and ECE in mode 1, mode 2 and mode 3. [CH4/CO2 [ 4/6, input power [ 14.4 kW,
flow rate [ 5 or 6.5 m3/h] (a)Conversions of CH4 and CO2, (b) Selectivities of H2 and CO, (c) Specific energy (SE), (d) Energy conversion efficiency (ECE).