Accession Number : AD0805793

Title :   ADSORPTION OF CARBON DIOXIDE--PARTICLE AND ADSORBER CONFIGURATION.

Descriptive Note : Interim rept. Sep 65-Jun 66,

Corporate Author : AIR FORCE FLIGHT DYNAMICS LAB WRIGHT-PATTERSON AFB OH

Personal Author(s) : Fox, W. B., Jr

Report Date : OCT 1966

Pagination or Media Count : 25

Abstract : The purpose of this report is to describe the effect of molecular sieve particle size and adsorber bed configuration changes on adsorption and desorption. A further goal is to develop a method to evaluate carbon dioxide adsorbents. With the same mass velocity, bed length, and cycle time, about twice the adsorption efficiency is obtained in a 2.3 inch diameter adsorber tube compared to a .45 inch diameter tube. Increased adsorption efficiency is obtained by decreasing the particle size of the adsorbent. Desorption times using .45 and 2.3 inch diameter adsorber tubes are compared for free convection heating and cooling. Over three times the desorption time is needed for a 2.3 inch diameter tube when compared to a .45 inch diameter tube. The selection of minimum weight absorber beds under various conditions of mass velocity, concentration, adsorption efficiency, bed length, and particle size is discussed. Maximum values of adsorption per unit volume give the specific conditions under which minimum weight is obtained. Typical adsorption calculations are included in the report. Determination of adsorption per unit volume from data and desorption times provides sufficient information for evaluation of adsorbents and adsorber operation. (Author)

Descriptors :   *ABSORPTION), *CONTROLLED ATMOSPHERES), (*CARBON DIOXIDE, (*CLOSED ECOLOGICAL SYSTEMS, (*SILICATES, CARBON DIOXIDE), SPACECRAFT CABINS, ADSORPTION, PARTICLE SIZE, CHEMISORPTION, MOLECULAR STRUCTURE, DECOMPOSITION, MANNED SPACECRAFT, VELOCITY, SPACE ENVIRONMENTS, PELLETS, BAROMETRIC PRESSURE.

Subject Categories : Life Support Systems

Distribution Statement : APPROVED FOR PUBLIC RELEASE