RESEARCH AND DEVELOPMENT ON CLOSED RESPIRATORY SYSTEM ACCESSORIES. MOLECULAR SIEVES FOR CARBON DIOXIDE ADSORPTION.
Rept. for 2 Jan-15 May 61 on Equipment for Life Support in Aerospace,
HONEYWELL INC MINNEAPOLIS MINN
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Present means for carbon dioxide removal for manned space capsules impose serious weight penalties for long missions. A regenerable adsorber is considered which would employ molecular sieve material from which adsorbed CO2 can be removed and expelled or recovered. One type of molecular sieve, Linde Type 5A, was studied experimentally. These studies prove the feasibility of using molecular sieves to control the CO2 level in a space cabin and indicate how operating variables such as temperature, pressure, humidity, gas velocity, etc., affect the design of an adsorption unit. Recommendations are given for additional experimental work to investigate more fully certain variables which influence the ultimate configuration of the adsorption system. Data for the design of a regenerable adsorption bed is presented, along with sample calculations illustrating the use of the data in designing a sorption bed for a three-man, fourteen-day prototype test system. Author