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Concentration of carbon dioxide by a high-temperature electrochemical membrane cellThe performance of a molten carbonate carbon dioxide concentrator (MCCDC) cell, as a device for removal of CO2 from manned spacecraft cabins without fuel expenditure, is investigated. The test system consists of an electrochemical cell (with an Li2CO3-38 mol pct K2CO3 membrane contained in a LiAlO2 matrix), a furnace, and a flow IR analyzer for monitoring CO2. Operation of the MCCDC-driven cell was found to be suitable for the task of CO2 removal: the cell performed at extremely low CO2 partial pressures (at or above 0.1 mm Hg); cathode CO2 efficiencies of 97 percent were achieved with 0.25 CO2 inlet concentration at 19 mA sq cm, at temperatures near 873 K. Anode concentrations of up to 5.8 percent were obtained. Simple cathode and anode performance equations applied to correlate cell performance agreed well with those measured experimentally. A flow diagram for the process is included.
Document ID
19870040126
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Kang, M. P.
(NASA Lewis Research Center Cleveland, OH; Georgia Institute of Technology, Atlanta, United States)
Winnick, J.
(Georgia Institute of Technology Atlanta, United States)
Date Acquired
August 13, 2013
Publication Date
January 1, 1985
Publication Information
Publication: Journal of Applied Electrochemistry
Volume: 15
ISSN: 0021-891X
Subject Category
Inorganic And Physical Chemistry
Accession Number
87A27400
Distribution Limits
Public
Copyright
Other

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