APPLICATION OF LITHIUM CHEMICALS FOR AIR REGENERATION OF MANNED SPACECRAFT
Final rept. for May 1964-Jan 1965
LITHIUM CORP OF AMERICA INC BESSEMER CITY NC INORGANIC PRODUCTS DIV
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Lithium oxide of highly active surface area 10 sq mg or better has been prepared. This material can absorb up to 1.25 times its weight of carbon dioxide, thus making the most efficient CO2 absorber on the basis of its weight. For efficient operation, the molar ratio of water vapor over carbon dioxide in the gaseous atmosphere should be at least unity. At 5 psia of oxygen and 50 relative humidity, the temperature of the gas should be at least 50F 10C to approach this molar ratio value. A passivedynamic atmosphere regeneration unit was designed with a small motor blower that circulates the gaseous environment through a cone shaped granular bed of lithium oxide 4-14 mesh. The unit weighs 4-12 pounds and has been shown to absorb the daily carbon dioxide output, or more, of one man. The outflowing gas is free of irritating dust due to efficient filters and the gas temperatures are at comfortable levels. The effects of weightlessness, vibration and acceleration on the functioning of the unit, have been considered in its design. An adequate amount of safety of operation also was imparted to the unit. The unit can easily be recharged with fresh lithium oxide granules.
- Inorganic Chemistry