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Characterization of metal oxide absorbents for regenerative carbon dioxide and water vapor removal for advanced portable life support systemsCharacterization of the performance of a silver-oxide-based absorbent in terms of its ability to remove both gaseous CO2 and water vapor in an astronaut portable life support systems (PLSS) is discussed. Attention is focused on regeneration of the absorbent from the carbonite state of the oxide state, preconditioning of the absorbent using a humidified gas stream, and absorption breakthrough testing. Based on the results of bench-scale experiments, a test plan is carried out to further characterize the silver-oxide-based absorbent on a larger scale; it calls for examination of the absorbent in both an adiabatic packed bed and a near-isothermal cooled bed configuration. It is demonstrated that the tested absorbent can be utilized in a way that removes substantial amounts of CO2 and water vapor during an 8-hour extravehicular activity mission, and that applying the absorbent to PLSS applications can simplify the ventilation loop.
Document ID
19900062377
Acquisition Source
Legacy CDMS
Document Type
Conference Paper
Authors
Kast, Timothy P.
(Allied-Signal Aerospace Co. Torrance, CA, United States)
Nacheff-Benedict, Maurena S.
(Allied-Signal Aerospace Co. Torrance, CA, United States)
Chang, Craig H.
(Allied-Signal Research and Technology Des Plaines, IL, United States)
Cusick, Robert J.
(NASA Johnson Space Center Houston, TX, United States)
Date Acquired
August 14, 2013
Publication Date
July 1, 1990
Subject Category
Inorganic And Physical Chemistry
Report/Patent Number
SAE PAPER 901431
Accession Number
90A49432
Funding Number(s)
CONTRACT_GRANT: NAS9-17836
CONTRACT_GRANT: NAS9-17900
Distribution Limits
Public
Copyright
Other

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