Accession Number : ADA140881

Title :   High Temperature Oxide Electrolytes for the Splitting of Water--The ROC Process.

Descriptive Note : Technical rept. 1 Jul 82-31 Oct 84,


Personal Author(s) : Fletcher,E A ; Diver,R B ; Noring,J E

PDF Url : ADA140881

Report Date : 05 Apr 1984

Pagination or Media Count : 17

Abstract : Solid oxygen passing membranes such as stabilized zirconia have been proposed for use as membranes in high temperature water splitting processes. This paper describes two-membrane systems, ROCs, which use a hydrogen passing membrane as well. An advantage of a two-membrane system is that water may be split in a single passage through the device, thus decreasing substantially thermodynamic losses associated with the heat exchanger and other appurtenances. Some problems such as the stability of hydrogen passing membranes in a water atmosphere are addressed. It is suggested that the ROC process may provide a means of protecting hydrogen passing membranes, and that electric ROCs may be unusually well suited for operation at temperatures at which palladium membranes might be used. The thermal efficiencies of two membrane systems with and without electrical enhancement are compared.

Descriptors :   *Electrolytes, *Electrolysis, *Water, *Splitting, Membranes, Oxygen, Hydrogen, High temperature, Diffusion, Thermodynamic properties, Heat exchangers, Stability, Electrical equipment, Thermal properties, Efficiency, Palladium, Separators, Oxides

Subject Categories : Physical Chemistry

Distribution Statement : APPROVED FOR PUBLIC RELEASE