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Optimization of the process parameters of an electrochemical cell in the IS process

ISプロセス用電解セルのプロセスパラメータの最適化

野村 幹弘*; 奥田 泰之; 笠原 清司  ; 中尾 真一*

Nomura, Mikihiro*; Okuda, Hiroyuki; Kasahara, Seiji; Nakao, Shinichi*

熱化学的水分解ISプロセス内のブンゼン反応(SO$$_{2}$$+I$$_{2}$$+2H$$_{2}$$O=H$$_{2}$$SO$$_{4}$$+2HI)を、カチオン交換膜を用いた電気化学セルを用いて検討した。アノード液,カソード液の最適濃度をプロセス全体の熱効率によって評価した。I$$_{2}$$/HI比は電圧にほとんど影響しなかったため、熱効率を下げることなく0.5まで削減できる。HI, H$$_{2}$$SO$$_{4}$$濃度は効率に大きく影響した。膜抵抗は効率に大きい影響を及ぼすため、重要なパラメータである。温度を313Kから363Kに上げることで、熱効率は3.0%改善した。

The Bunsen reaction (SO$$_{2}$$+I$$_{2}$$+2H$$_{2}$$O=H$$_{2}$$SO$$_{4}$$+2HI) in the water-splitting IS process was examined using an electrochemical cell with a cation exchange membrane. The optimal molalities of anolyte and catholyte were evaluated by total thermal efficiency. The I$$_{2}$$/HI ratio had little effect on the required total voltage; the I$$_{2}$$/HI ratio can be reduced to 0.5 without decreasing the efficiency. HI and H$$_{2}$$SO$$_{4}$$ molality greatly affected the efficiency. Membrane resistances are very important parameters affecting the efficiency. The total thermal efficiency increased by 3.0% by increasing the operating temperature from 313K to 363K.

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パーセンタイル:66.02

分野:Engineering, Chemical

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