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Journal Articles

Conceptual design of the iodine-sulfur process flowsheet with more than 50% thermal efficiency for hydrogen production

Kasahara, Seiji; Imai, Yoshiyuki; Suzuki, Koichi*; Iwatsuki, Jin; Terada, Atsuhiko; Yan, X.

Nuclear Engineering and Design, 329, p.213 - 222, 2018/04

https://doi.org/10.1016/j.nucengdes.2017.11.046

Times Cited Count：21 Percentile：90.78(Nuclear Science & Technology)

A conceptual design of a practical large scale plant of the thermochemical water splitting iodine-sulfur (IS) process flowsheet was carried out as a heat application of JAEA's commercial high temperature gas cooled reactor GTHTR300C plant design. Innovative techniques proposed by JAEA were applied for improvement of hydrogen production thermal efficiency; depressurized flash concentration H $_{2}$ SO $_{4}$ using waste heat from Bunsen reaction, prevention of H $_{2}$ SO $_{4}$ vaporization from a distillation column by introduction of H $_{2}$ SO $_{4}$ solution from a flash bottom, and I $_{2}$ condensation heat recovery in an HI distillation column. Hydrogen of about 31,900 Nm $^{3}$ /h would be produced by 170 MW heat from the GTHTR300C. A thermal efficiency of 50.2% would be achievable with incorporation of the innovative techniques and high performance HI concentration and decomposition components and heat exchangers expected in future R&D.