Studies on the chemical process for Energy technology

The chemical process is generally based on the nature of the chemical bonds and energy-saving while the physical process by use of high vacuum, high voltage, or high pressure is energy-consuming and coersive. By taking advantage of the features and merits of the chemical process, following three energy-related technologies were developed.
(1) Dipping-Pyrolysis process by use of metal organic acid salts as starting materials was applied to preparation of superconducting oxide films. Epitaxial growth of YBCO films with c-axis, a-axis and [110] orientations on SrTiO₃ single crystal substrates was successfully controlled and critical current density over 10⁶A/cm² was achieved at 77 K.
(2) The Mg-S-I thermochemical water-splitting cycle, consisting of (1)redox reaction of sulfur dioxide and iodine with magnesium oxide in aqueous phase, (2)hydrolysis of magnesium iodide, (3)thermal decomposition of magnesium sulfate, and (4)thermal dissociation of hydrogen iodine, was proposed. Both batch system and continuous flow system or the whole cycle.
(3) The Fe-C1 hybrid process consisting of the absorption of H₂S gas by FeC1₃ aqueous solution and subsequent electrolysis of FeCl₂ aqueous solution was proposed as a process for decomposing H₂S to H₂ and sulfur. A bench-scale plant for the process was successfuly operated.