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Hydrogen Production by Thermochemical Water-Splitting Is Process

Gab-Jin Hwang1, Seong-Dae Hong2, Jeong-Geun Kim2, Sang-Ho Lee2, Sang-Il Choi2, and Ki-Kwang Bae2. (1) Korea Institute of Energy Research, 71-2 Jang-dong, Yuseong-gu, Daejeon, 305-343, Korea, (2) Hydrogen Energy research Group, Korea Institute of Energy Research, 71-2 Jang-dong, Yuseong-gu, Daejeon, 305-343, Korea

Thermochemical water-splitting IS (iodine-sulfur) cycle produces the hydrogen from water using high temperature nuclear heat supplied by VHTR (very high temperature gas-cooled reactor). IS cycle is composed of three reactions; Bunsen reaction, sulfuric acid decomposition reaction and HI decomposition reaction. In KIER (Korea Institute of Energy Research), studies on the 2-liquid phase separation and purification, HI concentration form HIx solution (HI-I2-H2O mixture) by EED (electro-electrodialysis) and preparation of permselective membrane to use in membrane reactor for Bunsen reaction and HI decomposition reaction, respectively. Therefore a study on closed-loop cycle operation of IS cycle of 20µ/hr was carrying out. This paper presents result of the experiments conducting in KIER.