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.

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.

Language	:	English
Journal	:	Nuclear Engineering and Design
Volume	:	329
Number	:
Pages	:	p.213 - 222
Publication Year/Month	:	2018/04
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Paper URL	:	https://doi.org/10.1016/j.nucengdes.2017.11.046
DOI for research data	:	Link to research data related to this paper/report.
Keywords	:	High Temperature Gas-cooled Reactor; Hydrogen Production; Iodine-sulfur Process; Conceptual Design; Flowsheet; Thermal Efficiency
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Article of JAEA R&D Review	:	Improving Hydrogen Production Efficiency Using Innovative Technologies; High-Efficiency Process Design of the Thermochemical IS Process[/]
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Registration No. : AA20170060
JAEA Abstracts No. : 46000455
Paper Submission No. : 20052

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