Kasahara,-Seiji; Kubo,-Shinji; Sato,-Hiroyuki; Sakaba,-Nariaki (Japan Atomic Energy Agency, Nuclear Science and Engineering Directorate, Oarai, Ibaraki (Japan) Purification methods of hydrogen and oxygen as products of thermochemical hydrogen production iodine sulphur (IS) process thermally connected with the High Temperature Engineering Test Reactor (HTTR) was investigated and evaluated. Present state of R and D of membrane separation method, pressure swing adsorption (PSA) method and cryogenic distillation method was researched and their applicability to the HTTR-IS system was evaluated. At present, PSA method was the most effective due to its feasibility, soundness and reliability with past performance. In addition, hydrogen purification systems by using PSA and membrane separation method were described in this paper.
