Accession Number:

AD0663762

Title:

CONFIGURATION INVESTIGATION FOR LITHIUM OXIDE CARBON DIOXIDE CONTROL SYSTEMS

Descriptive Note:

Final rept. Dec 1965-Dec 1966

Corporate Author:

FOOTE MINERAL CO EXTON PA RESEARCH AND ENGINEERING CENTER

Report Date:

1967-10-01

Pagination or Media Count:

158.0

Abstract:

The bulk density of lithium oxide shapes and granules has been increased substantially while retaining good reactivity. Absorbent forms of the oxide can be prepared in the bulk density range of 0.18 to 0.28 gcc. For granular oxide, results indicate a reasonable compromise between reactivity and absorbent volume efficiency is about 0.20 gcc in passive systems and 0.26 to 0. 28 gcc in semipassive or dynamic systems. The improvement results from use of high about 18 m sqg surface area lithium peroxide raw material and techniques in processing the peroxide to oxide. Tests indicate the oxide forms developed can equal passive exposure or exceed semipassive or dynamic exposure the 0.8 g CO2g LiOH capacity of granular lithium hydroxide before 2 breakthrough. Dusting of the granular oxide form was reduced by controlled abrasion and fabric encasement techniques. Tests at one-third and normal atmospheres indicated higher carbon dioxide absorption rates at the lower pressure. A marked improvement was found in oxygen-helium as compared to oxygen and oxygen-nitrogen atmospheres. Atmospheric moisture conditions required for efficient absorption were defined. Exploratory work indicates partial hydration of the oxide is one method for initiating absorption under low humidity conditions. Gravimetric analysis work, which confirmed that density limitations are presently imposed by reaction product-substrate molar volume relations, should provide useful guidelines for absorbent design and further experimentation.

Subject Categories:

  • Inorganic Chemistry
  • Physical Chemistry

Distribution Statement:

APPROVED FOR PUBLIC RELEASE