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Three SOFC test stacks were operated under conditions of direct internal steam reforming of methane at 750 °C. The influence of anode gas compositions (H2/N2, CH4/H2O, CH4/H2/H2O) on the stack degradation rate has been investigated through long‐term durability testing. It has been found that complete internal steam reforming of methane leads to much faster degradation in comparison to partial pre‐reforming...
A 5‐cell solid oxide electrolyzer cell (SOEC) stack has been operated at ca. 700 °C for 2,000 h under static conditions followed by a short‐term transient operation. The best repeating unit (RU) showed an area specific resistance of 0.4 Ω cm2 and an initial voltage of 1.125 V at 705 °C and –0.6 A cm–2 when fed with 90% H2O/10% H2 at the hydrogen‐electrode. One instability factor has been observed,...
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