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ハイブリッド熱化学法による水素製造試験; システム成立性及び効率の簡易的評価

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

高井 俊秀; 中桐 俊男; 稲垣 嘉之

Takai, Toshihide; Nakagiri, Toshio; Inagaki, Yoshiyuki

高速増殖炉用水素製造技術として提案されたハイブリッド熱化学法に基づく工学試験装置を使用し、システム成立性を確認するための試験を実施するとともに、本試験装置の現状における水素製造効率を簡易的評価し、改良点の摘出を行った。実験においては、SO$$_{3}$$電解器に装着されたYSZ管7本のうち4本を作動させ、SO$$_{3}$$電解器温度約600$$^{circ}$$Cの条件で、約1.1時間の間、ほぼ約0.4NL/h-H$$_{2}$$(1.1$$times$$10$$^{-7}$$Nm$$^{3}$$/s-H$$_{2}$$)の速度で水素を発生できることを確認した。現状の装置における水素製造効率を簡易的に評価することにより、水素製造効率を向上させるには、水素製造に寄与しない余剰の硫酸循環量の低減,電解電圧の低減が有効であることを明らかにした。

A new experimental apparatus by the thermo-chemical and electrolytic $$underline{H}$$ybrid $$underline{H}$$ydrogen production in $$underline{L}$$ower $$underline{T}$$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$$_{3}$$ 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.

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