Hydrogen- and Oxygen from Water

Science  09 Sep 1977:
Vol. 197, Issue 4308, pp. 1050-1056
DOI: 10.1126/science.197.4308.1050


The limitations of thermochemical energy storage devices are the limitations of Carnot devices. Entropy production entailed in product separation further limits the efficiency of thermochemical processes. Thus, high upper temperatures and few reaction steps are desirable. In this article, the one-step effusional separation of water into hydrogen and oxygen is considered. Membrane materials, design, and fabrication techniques are suggested. A parametric analysis of the process suggests that the idea is a tantalizing possibility.