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Virtual Design of a 4-Bed Molecular Sieve for ExplorationSimulations of six new 4-Bed Molecular Sieve configurations have been performed using a COMSOL (COMSOL Multiphysics - commercial software) model. The preliminary results show that reductions in desiccant bed size and sorbent bed size when compared to the International Space Station configuration are feasible while still yielding a process that handles at least 4.0 kilograms a day CO2. The results also show that changes to the CO2 sorbent are likewise feasible. Decreasing the bed sizes was found to have very little negative effect on the adsorption process; breakthrough of CO2 in the sorbent bed was observed for two of the configurations, but a small degree of CO2 breakthrough is acceptable, and water breakthrough in the desiccant beds was not observed. Both configurations for which CO2 breakthrough was observed still yield relatively high CO2 efficiency, and future investigations will focus on bed size in order to find the optimum configuration.
Document ID
20170008961
Document Type
Conference Paper
Authors
Giesy, Timothy J. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Coker, Robert F. (NASA Marshall Space Flight Center Huntsville, AL, United States)
O'Connor, Brian F. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Knox, James C. (NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
September 22, 2017
Publication Date
July 16, 2017
Subject Category
Inorganic, Organic and Physical Chemistry
Report/Patent Number
ICES-2017-111
M17-6071
Meeting Information
International Conference on Environmental Systems (ICES) 2017(Charleston, SC)
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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