Current R&D status of thermochemical water splitting iodine-sulfur process in Japan Atomic Energy Agency. (11th May 2017)

• Record Type: Journal Article
• Authors: Kasahara, S.; Iwatsuki, J.; Takegami, H.; Tanaka, N.; Noguchi, H.; Kamiji, Y.; Onuki, K.; Kubo, S.
• Is Part Of: International journal of hydrogen energy. Volume 42:Number 19(2017)
• Page Start: 13477
• Page End: 13485
• Publication Date: 2017-05-11
• Subjects: Hydrogen production -- Thermochemical water splitting -- Iodine-sulfur process; Hydrogen as fuel -- Periodicals; Hydrogène (Combustible) -- Périodiques; Hydrogen as fuel; Periodicals; 665.81
• DOI: 10.1016/j.ijhydene.2017.02.163
• Languages: English
• ISSNs: 0360-3199

Abstract

Abstract: Current R&D on the thermochemical water splitting iodine-sulfur (IS) process in Japan Atomic Energy Agency (JAEA) is summarized. Reactors were fabricated with industrial materials and verified by test operations: a Bunsen reactor, a H2 SO4 decomposer, and a HI decomposer. Component materials of the reactors were stable in the operation environment. Small amount of H2 SO4 in the anolyte solution in an electro-electrodialysis (EED) cell had no negative impact on cell performance parameters. Relationship between cell solution composition and temperature and cell parameters was formulated by experimental data. Demonstration of the test facility with process design of 100 L/h hydrogen production is performed to verify integrity of process components and stability of hydrogen production. Tests of sections were first conducted individually to show material processing rates were controllable. Based on the result, an 8-h continuous operation of the total IS process was performed in February 2016 with H2 production rate of 10 L/h. Demonstrations are planned for longer operation period and higher H2 production rate after improvement of components to prevent troubles. Highlights: Current R&D on the iodine-sulfur (IS) process in JAEA is summarized. Reactors of industrial materials showed corrosion stability. Effect of compositions and temperature on the EED cell performance was evaluated. Controllability of material processing rate in process components was verified. H2 of 10 L/h was produced for 8 h in an industrial-material facility.