This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Stability of IRA-45 Solid Amine Resin as a Function of Carbon Dioxide Absorption and Steam Desorption Cycling
Annotation ability available
Sector:
Language:
English
Abstract
A solid-amine water (steam) desorbed (SAWD) carbon dioxide removal subsystem is a candidate for use on the proposed U.S. Space Station for removing carbon dioxide (CO2) from the spacecraft cabin atmosphere. To evaluate the long-term stability of the solid amine resin, IRA-45, with respect to repeated CO2 absorption and steam desorption cycling, an automated laboratory flow-test facility was assembled. Packed columns of IRA-45 resin were tested under simulated Space Station cabin conditions for 569 cycles to determine 1) the decrease in CO2 absorption capacity as a function of the number of cycles and 2) the volatile organic compounds released by steam desorption cycling. Carbon dioxide capacity was measured in real-time during each cycle. Organic volatiles in the resin-desorbed CO2 and in the simulated cabin air flow were trapped on graphitic carbon adsorbents. Analyses of the trapped volatiles were performed using gas chromatography (GC) and mass spectrometry (MS). The CO2 adsorption capacity of the IRA-45 gradually decreased over time but the rate of degradation slowed significantly after about the first 10 cycles. After a 43% loss in capacity during the first 10 cycles, the additional loss in CO2 capacity was only about 2.7% during the remaining 560 cycles. During the first 80 cycles, trimethylamine was present in the process air downstream of the resin bed in concentrations that were at or above the spacecraft maximum allowable limit (SMAC). The continued presence of trimethylamine after 569 cycles suggested that it is a principal resin breakdown product and that it may be necessary to post-treat the process air in order to minimize exposure of the Space Station crew to this toxic chemical.
Recommended Content
| Technical Paper | Development of an Amine-based System for Combined Carbon Dioxide, Humidity, and Trace Contaminant Control |
| Technical Paper | CO2 Removal with Enhanced Molecular Sieves |
| Technical Paper | Orbiter Regenerable CO2 Sorbent Life Characterization |
Authors
Citation
Wood, P. and Wydeven, T., "Stability of IRA-45 Solid Amine Resin as a Function of Carbon Dioxide Absorption and Steam Desorption Cycling," SAE Technical Paper 871452, 1987, https://doi.org/10.4271/871452.Also In
References
- Nason J. R. Colling A. K. Jr. “Lightside Atmospheric Revitalization System for Space Shuttle Orbiter,” ASME Paper No. 81-ENAs-26 July 1981
- Heppner D. B. Schubert F. H. “Electrochemical and Steam-Desorbed Amine CO 2 Concentration: Subsystem Comparison,” SAE Paper No. 831120 July 1983
- Boehm Albert M. Cusick Robert J. “A Regenerable Solid Amine CO 2 Concentrator for Space Station,” SAE Paper No. 820847 July 1982
- Dresser Kenneth J. Cusick Robert J. “Development of Solid Amine CO 2 Control Systems for Extended Duration Missions,” SAE Paper No. 840937 July 1984
- Rankin R. L. Roehlich F. Vancheri F. “Development of System Design Information for Carbon Dioxide Using an Amine-Type Sorber,” NASA CR-111849 1971
- Wood Peter C. Wydeven Theodore “The Use of Superoxide Mixtures as Air Revitalization Chemicals in Hyperbaric, Self-Contained, Closed-Circuit Breathing Apparatus,” NASA TM-86709 1985
- Bruner Fabrizio Bertoni Giuliano Crescentini Giancarlo “Critical Evaluation of Sampling and Gas Chromatographic Analysis of Halocarbons and Other Organic Air Pollutants,” Journal of Chromatography 167 1978 399 407
- Bertoni G. Bruner F. Liberti A. Perrino C “Some Critical Parameters in Collection, Recovery and Gas Chromatographic Analysis of Organic Pollutants in Ambient Air Using Light Adsorbents,” Journal of Chromatography 203 1981 203 270
- Mangani F. Mastrogiancomo A. R. “Evaluation of the Working Conditions of Light Adsorbents and Their Use as Sampling Material for the GC Analysis of Organic Air Pollutants in Work Areas,” Chromatographia 15 1982 712 716
- Betti Adalberto Coppi Simona Bighi Corrado “Pre-concentration of Organic Pollutants. Potential Interference from the Use of Styrene Copolymer Adsorbents,” Journal of Chromatography 349 1985 181 187
- Mignon P. “CO 2 Removal from Submarines' Atmosphere by IR-45: Feasibility Study,” ASME Paper No. 76-ENAs-4 July 1976
- Kerwin Joseph P. “Temporarily Assigned Spacecraft Maximum Allowable Concentration (SMAC) Limits of Atmospheric Contaminants for Missions up to Ten Days,” NASA Memorandum Lyndon B. Johnson Space Center Jan. 16
- Ruth Jon H. “Odor Thresholds and Irritation Levels of Several Chemical Substances: A Review,” American Industrial Hygiene Association Journal 47 1986 A142 A151
- Colling Arthur K. Jr. Nalette Timothy A. Cusick Robert J. Reysa Richard P. “Development Status of Regenerable Solid Amine CO 2 Control Systems,” SAE Paper No. 851340 July 1985