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  • 1
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    High Pressure Excess Isotherms for Adsorption of Oxygen and Nitrogen in Zeolites (2011)
    American Chemical Society
    Details
    Publication Date: 2011-09-06
    Print ISSN: 0743-7463
    Electronic ISSN: 1520-5827
    Topics: Chemistry and Pharmacology
    Published by American Chemical Society
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    PAPER CURRENT
  • 2
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    Design and Development of an air-cooled Temperature-Swing Adsorption Compressor for Carbon Dioxide (2003)
    In:  Other Sources
    Details
    Publication Date: 2019-07-18
    Description: The air revitalization system of the International Space Station (ISS) operates in an open loop mode and relies on the resupply of oxygen and other consumables from earth for the life support of astronauts. A compressor is required for delivering the carbon dioxide from a removal assembly to a reduction unit to recover oxygen and thereby closing the air-loop. We have a developed a temperature-swing adsorption compressor (TSAC) for performing these tasks that is energy efficient, quiet, and has no wearing parts. This paper discusses the design features of a TSAC hardware that uses air as the cooling medium and has Space Station application.
    Keywords: Mechanical Engineering
    Type: Habitation 2004; Jan 04, 2004 - Jan 07, 2004; Orlando, FL; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 3
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    Performance of Adsorption - Based CO2 Acquisition Hardware for Mars ISRU (2000)
    In:  Other Sources
    Details
    Publication Date: 2019-07-17
    Description: Chemical processing of the dusty, low-pressure Martian atmosphere typically requires conditioning and compression of the gases as first steps. A temperature-swing adsorption process can perform these tasks using nearly solid-state hardware and with relatively low power consumption compared to alternative processes. In addition, the process can separate the atmospheric constituents, producing both pressurized CO2 and a buffer gas mixture of nitrogen and argon. To date we have developed and tested adsorption compressors at scales appropriate for the near-term robotic missions that will lead the way to ISRU-based human exploration missions. In this talk we describe the characteristics, testing, and performance of these devices. We also discuss scale-up issues associated with meeting the processing demands of sample return and human missions.
    Keywords: Lunar and Planetary Science and Exploration
    Type: Environmental Systems; Jul 10, 2000 - Jul 13, 2000; Toulouse; France
    Format: text
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    NASA TECHNICAL REPORTS
  • 4
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    A Solid-State Compressor for Integration of CO2 Removal and Reduction Assemblies (2000)
    In:  Other Sources
    Details
    Publication Date: 2019-07-17
    Description: Integration of CO2 removal and reduction assemblies in a spacecraft air revitalization system requires an interface with the functionality of a vacuum pump/compressor and a buffer tank. The compressor must meet the vacuum needs of the CO2 removal unit and the pressure needs of the CO2 reduction device, and must also store sufficient CO2 to accommodate the differences in cycle times of the two processes. In this presentation, we describe the design and operation of an adsorption-based device sized for use on the International Space Station. The adsorption compressor functions at a power level approximately ten times lower than a comparable mechanical compression/buffer tank system. The unit is also smaller, lighter, and quieter than its mechanical counterpart.
    Keywords: Man/System Technology and Life Support
    Type: Environmental Systems; Jul 10, 2000 - Jul 13, 2000; Toulouse; France
    Format: text
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    NASA TECHNICAL REPORTS
  • 5
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    The Concept and Experimental Investigation of CO2 and Steam Co-electrolysis for Resource Utilization in Space Exploration (2009)
    In:  Other Sources
    Details
    Publication Date: 2019-07-19
    Description: CO2 acquisition and utilization technologies will have a vital role in determining sustained and affordable life support and in-situ fuel production architectures for human and robotic exploration of Moon and Mars. For long-term human exploration to be practical, reliable technologies have to be implemented to capture and chemically reduce the metabolic CO2 from the cabin air to restitute oxygen consumption. Technologies that facilitate the in-situ capture and conversion of atmospheric CO2 to fuel are essential for a viable human mission to Mars and their demonstration on the moon is critical as well. This paper describes the concept and experimental investigation of a CO2 capture and reduction system that comprises an adsorption compressor and a CO2 and steam co-electrolysis unit. The process products include oxygen for life support and Syngas (CO and H2) for synthetic fuel production. Electrochemical performance in terms of CO2 conversion, oxygen production, and power consumption of a system with a capacity to process 1kg CO2 per day (1-person equivalent) will be discussed.
    Keywords: Man/System Technology and Life Support
    Type: ARC-E-DAA-TN408 , International Conference On Environmental Systems; Jul 12, 2009 - Jul 16, 2009; Savannah, GA; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 6
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    CO2 Removal and Atmosphere Revitalization Systems for Next Generation Space Flight (2010)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Removal of metabolic CO2 from breathing air is a vital process for life support in all crewed space missions. A CO2 removal processor called the Low Power CO2 Removal (LPCOR) system is being developed in the Bioengineering Branch at NASA Ames Research Center. LPCOR utilizes advanced adsorption and membrane gas separation processes to achieve substantial power and mass reduction when compared to the state-of-the-art carbon dioxide removal assembly (CORA) of the US segment of the International Space Station (ISS). LPCOR is an attractive alternative for use in commercial spacecraft for short-duration missions and can easily be adapted for closed-loop life support applications. NASA envisions a next-generation closed-loop atmosphere revitalization system that integrates advanced CO2 removal, O2 recovery, and trace contaminant control processes to improve overall system efficiency. LPCOR will serve as the front end to such a system. LPCOR is a reliable air revitalization technology that can serve both the near-term and long-term human space flight needs of NASA and its commercial partners.
    Keywords: Man/System Technology and Life Support
    Type: ARC-E-DAA-TN2426 , CRASTE Commercial and Govt Responsive Access to Space; Oct 25, 2010 - Oct 28, 2010; Mountain View, CA; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 7
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    Air-Cooled Design of a Temperature-Swing Adsorption Compressor for Closed-Loop Air Revitalization Systems (2004)
    In:  Other Sources
    Details
    Publication Date: 2019-07-18
    Description: The air revitalization system of the International Space Station (ISS) operates in an open loop mode and relies on the resupply of oxygen and other consumables from earth for the life support of astronauts. A compressor is required for delivering the carbon dioxide from a removal assembly to a reduction unit to recover oxygen and thereby closing the air-loop. We have a developed a temperature-swing adsorption compressor (TSAC) for performing these tasks that is energy efficient, quiet, and has no rapidly moving parts. This paper discusses the mechanical design and the results of thermal model validation tests of a TSAC that uses air as the cooling medium.
    Keywords: Mechanical Engineering
    Type: 34rd International Conference on Environmental Systems Meeting; Jul 19, 2004 - Jul 22, 2004; Colorado Springs, CO; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 8
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    Temperature Swing Adsorption Compressor Development (2001)
    In:  Other Sources
    Details
    Publication Date: 2019-07-18
    Description: Closing the oxygen loop in an air revitalization system based on four-bed molecular sieve and Sabatier reactor technology requires a vacuum pump-compressor that can take the low-pressure CO, from the 4BMS and compress and store for use by a Sabatier reactor. NASA Ames Research Center proposed a solid-state temperature-swing adsorption (TSA) compressor that appears to meet performance requirements, be quiet and reliable, and consume less power than a comparable mechanical compressor/accumulator combination. Under this task, TSA compressor technology is being advanced through development of a complete prototype system. A liquid-cooled TSA compressor has been partially tested, and the rest of the system is being fabricated. An air-cooled TSA compressor is also being designed.
    Keywords: Mechanical Engineering
    Type: Advanced Life Support PI Meeting; Nov 07, 2001; Alexandria, VA; United States
    Format: text
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    NASA TECHNICAL REPORTS
  • 9
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    Integrated Testing of a 4-Bed Molecular Sieve and a Temperature-Swing Adsorption Compressor for Closed-Loop Air Revitalization (2004)
    In:  CASI
    Details
    Publication Date: 2019-07-13
    Description: Accumulation and subsequent compression of carbon dioxide that is removed from space cabin are two important processes involved in a closed-loop air revitalization scheme of the International Space Station (ISS). The 4-Bed Molecular Sieve (4BMS) of ISS currently operates in an open loop mode without a compressor. This paper reports the integrated 4BMS and liquid-cooled TSAC testing conducted during the period of March 3 to April 18, 2003. The TSAC prototype was developed at NASA Ames Research Center (ARC). The 4BMS was modified to a functionally flight-like condition at NASA Marshall Space Flight Center (MSFC). Testing was conducted at MSFC. The paper provides details of the TSAC operation at various CO2 loadings and corresponding performance of CDRA.
    Keywords: Aircraft Propulsion and Power
    Type: Rept-041CES-299 , 34th International Conference on Environmental Systems; Jul 19, 2004 - Jul 22, 2004; Colorado Springs, CO; United States
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 10
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    Carbon Dioxide Adsorption on a 5A Zeolite Designed for CO2 Removal in Spacecraft Cabins (1998)
    In:  CASI
    Details
    Publication Date: 2019-07-10
    Description: Carbon dioxide adsorption data were obtained for a 5A zeolite manufactured by AlliedSignal Inc. (Des Plaines, Illinois). The material is planned for use in the Carbon Dioxide Removal Assembly (CDRA) for U.S. elements of the International Space Station. The family of adsorption isotherms covers a temperature range of O to 250 C, and a pressure range of 0.001 to 800 torr. Coefficients of the Toth equation are fit to the data. Isosteric heats of adsorption are derived from the equilibrium loading data.
    Keywords: Inorganic and Physical Chemistry
    Type: NASA/TM-1998-208752 , Rept-A9800125 , NAS 1.15:208752
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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