Experimental investigation of anodic gaseous concentration of a practical seal-less solid oxide fuel cell

Internal reforming characteristics of cermet supported solid oxide fuel cell using yttria stabilized zirconia fed with partially reformed methane

“…2 along with the results obtained using the previously reported lanthanum gallate cell [3]. H 2 supplied from the center of the cell decreased more rapidly in the case of the lanthanum gallate cell than in the present case and the increase in the steam concentration became steeper, accordingly.…”

“…H 2 supplied from the center of the cell decreased more rapidly in the case of the lanthanum gallate cell than in the present case and the increase in the steam concentration became steeper, accordingly. This was explained by the presence of the electronic conduction in the lanthanum gallate assuming the electronic transference number to be 0.7% in our previous study [3]. There are several reports concerning the electronic conductivity of the lanthanum gallate.…”

“…The previous simulations [3,5] have shown that the large drop in the local emf at the outlet region caused the reversal of the cell voltage and the local emf and, hence, to the occurrence of the electrolysis current at the outlet region. On the other hand, the present simulation predicted the generation of the electrolysis current not only at the outlet region, but also at the inlet region.…”

“…From this point of view, first of all, Momma et al [3] measured the gaseous composition of five different points along the fuel flow inside the anode using a practical size seal-less structure single cell (120 mm diameter) using H 2 as the fuel and lanthanum gallate as the electrolyte. As a result, by comparing the experimental data with the simulation, the validity of the experimental procedure and the simulation were mutually confirmed.…”

Technological development of hydrogen production by solid oxide electrolyzer cell (SOEC)

“…As the Pt electrode exhibited lower overpotential than the Ni-YSZ cermet, the authors recommended using Pt as the cathode of SOEC. However, other studies reported that the area-specific resistance of Ni-YSZ cermet electrode did not differ much between the SOFC mode and the SOEC mode [102,103]. The discrepancy among these studies has not been fully understood yet.…”