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A System design study of a fast breeder reactor hydrogen production plant using thermochemical and electrolytic hybrid process

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近澤 佳隆  ; 中桐 俊男  ; 此村 守; 内田 正治*; 土山 佳彦*

Chikazawa, Yoshitaka; Nakagiri, Toshio; Konomura, Mamoru; Uchida, Shoji*; Tsuchiyama, Yoshihiko*

ハイブリッド熱化学法は硫酸を用いた熱化学法であるウェスティングハウス法にSO$$_{3}$$ガス電気分解を併用することにより500$$^{circ}$$C程度の温度で水素を生成する手法である。本研究ではナトリウム冷却高速炉を熱源とした水素製造プラントを想定し、耐硫酸性の観点から水素製造系の系統仕様と主要機器の概念設計を行い、水素製造系物量及び水素製造効率等を評価した。系統仕様の工夫により鉄系の材料を用いて水素製造系機器の設計が可能であり、高効率の電気分解を前提とすれば水素製造効率44%程度が達成可能であることが明らかとなった。

Hydrogen production with a fast breeder reactor is attractive as a long term energy source with nuclear fuel breeding. The thermochemical and electrolytic hybrid process is one of the hydrogen production methods using sulfuric acid cycle with the maximum temperature 500$$^{circ}$$C which can be supplied by a sodium cooled fast breeder reactor. In this study, a hydrogen production plant with the thermochemical and electrolytic hybrid process has been designed and the hydrogen production efficiency has been evaluated. In the present concept, components in hydrogen production system are designed to be made of steels such as high Si cast iron which has good toughness against sulfuric acid. High hydrogen production efficiency of 44% (high heating value) is achieved assuming development of high efficiency electrolysis.

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パーセンタイル:35.67

分野:Nuclear Science & Technology

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