A Hydrogen production experiment by the thermo-chemical and electrolytic hybrid hydrogen production in lower temperature range; System viability and preliminary thermal efficiency estimation

Takai, Toshihide  ; Nakagiri, Toshio  ; Inagaki, Yoshiyuki

A new experimental apparatus by the thermo-chemical and electrolytic ybrid ydrogen production in ower emperature range (HHLT) was developed and hydrogen production experiment was performed to confirm the system operability. Hydrogen production efficiency was estimated and technical problems were clarified through the experimental results. Stable operation of the SO electrolysis cell and the sulfur dioxide solution electrolysis cell were confirmed during experimental operation and any damage which would be affected solid operation was not detected under post operation inspection. To improve hydrogen production efficiency, it was found that the reduction of sulfuric acid circulation and the decrease in the cell voltage were key issues.