Immobilized Liquid Membranes for Continuous Carbon Dioxide Removal

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Report Number: AMRL TR 67-53
Author(s): Ward, W. J.
Corporate Author(s): General Electric Company
Laboratory: Aerospace Medical Research Laboratories
Date of Publication: 1967-06
Pages: 48
Contract: AF 33(615)-2957
DoD Project: 6373
DoD Task: 637303
Identifier: AD0656785

Abstract:
The objective of the program was the development of an immobilized liquid membrane for CO2 removal from a manned spacecraft. During basic film research, water was found to be better than a polymeric material or any pure liquid for CO2/O2 separation. An immobilized film of water was available in the form of a porous cellulose acetate membrane. By impregnating this membrane with a concentrated solution of CsHCO3/Cs2CO3, and a catalyst for the hydrolysis of CO2, CO2 transport was facilitated and O2 transport was decreased to obtain a CO2/O2 separation factor and CO2 permeability of 4100 and 55, 796 x 10 to the -9th power. A mathematical analysis of CO2 transport was also carried out. It will now be possible to build a single-stage CO2 removal system with minimum power, weight, and size requirements.

Provenance: RAF Centre of Aviation Medicine

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