STATUS OF THE THERMOCHEMICAL WATER SPLITTING FOR HYDROGEN PRODUCTION
Definition of thermochemistry is given, as one of the possible ways for the decomposition of water. An overview of the related studies in the last years allows to follow the evolution of research in the field, mentioning the different types of thermochemical processes, which were defined, studied, evaluated. Criteria for process selection are also mentioned. Details are given on the major processes on which attention was concentrated in the more recent years, i.e. the cycles of the so-called ""sulphur family"" based on the thermal decomposition of sulphuric acid. Pure thermochemical and hybrid processes are described, as studied by Westinghouse, General Atomic, JRC-Ispra and in Japan. Experimental realizations at laboratory level have shown in 1978 the scientific feasibility of thermochemical water splitting; successive studies were concentrated on the technological developments, solving the materials problems and verifying experimentally chemical engineering solutions. Efforts are at present oriented to two main directions: technological realizations and search for new cycles and new ideas. Countries in which activities are in progress are Germany, Japan, USA, Commission of European Communities. The high temperature heat sources which are considered are HT Reactors and Solar Furnaces; considerations are also paid to Thermonuclear Fusion Reactors. The economic evaluations, still in approximate calculations, show possible competitivity with future, advanced electrolysis. Conclusions on the basis of the research performed up to now are given, together with comments on future perspectives of this possible new technology.
Bibliographic Reference: TECHNICAL COMMITTEE AND WORKSHOP "NUCLEAR HEAT APPLICATION", KRAKOW (POLAND), DEC. 5-9, 1983 WRITE TO CEC LUXEMBOURG, DG XIII/A2, POB 1907 MENTIONING PAPER E 31348 ORA
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Record Number: 1989122067300 / Last updated on: 1987-01-01
Available languages: en