Carbon Dioxide Reduction and Water Electrolysis System

Download this report (PDF, 2.95 MB, 84 pages)
Report Number: AMRL TR 67-227
Author(s): Kim, Byung C., Kolic, Edwin S., Cherry, Robert H., Clifford, John E.
Corporate Author(s): Battelle Memorial Institute
Laboratory: Aerospace Medical Research Laboratories
Date of Publication: 1968-05
Pages: 84
Contract: AF 33(615)-3444
DoD Project: 6373
DoD Task: 637302
Identifier: AD0673903

Abstract:
An integrated system for oxygen recovery from carbon dioxide was investigated as a breadboard laboratory model of nominal 1/2-man capacity. System design for carbon dioxide reduction was based on alternate operation of two Bosch reactors with periodic cool down for removal of carbon and replenishment of catalyst. Experimental studies demonstrated attainment of the design objectives of a carbon-to-catalyst ratio above 20 and an overall carbon- packing density of 0.45 g/cu.cm. in the catalyst chamber. Degradation of Bosch reactor materials during extended operation was a problem that was not completely resolved. Experimental studies indicated that a regenerable solid- adsorbent based on combinations of silica gel and molecular sieve operating on alternate cycles of absorption and desorption can be used for efficient transfer of water vapor from the Bosch recycle gas to a water-vapor electrolysis cell. The original matrix-type water-vapor electrolysis unit with Pd-25Ag hydrogen diffusion cathodes did not perform satisfactorily and was replaced by a water- vapor electrolysis unit with phosphoric acid electrolyte for satisfactory evaluation of water-vapor transfer for the integrated system.

Provenance: RAF Centre of Aviation Medicine

Other options for obtaining this report:

Via the Defense Technical Information Center (DTIC):
A record for this report, and possibly a pdf download of the report, exists at DTIC

Via National Technical Report Library:
This report may be available for download from NTRL. Use the Title from this record to locate the item in DTIC Online

Indications of Public Availability
No digital image of an index entry indicating public availability is currently available
There has been no verification of an indication of public availability from an inside cover statement