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Microwave Regenerable Air Purification DeviceThe feasibility of using microwave power to thermally regenerate sorbents loaded with water vapor, CO2, and organic contaminants has been rigorously demonstrated. Sorbents challenged with air containing 0.5% CO2, 300 ppm acetone, 50 ppm trichloroethylene, and saturated with water vapor have been regenerated, singly and in combination. Microwave transmission, reflection, and phase shift has also been determined for a variety of sorbents over the frequency range between 1.3-2.7 GHz. This innovative technology offers the potential for significant energy savings in comparison to current resistive heating methods because energy is absorbed directly by the material to be heated. Conductive, convective and radiative losses are minimized. Extremely rapid heating is also possible, i.e., 1400 C in less than 60 seconds. Microwave powered thermal desorption is directly applicable to the needs of Advance Life Support in general, and of EVA in particular. Additionally, the applicability of two specific commercial applications arising from this technology have been demonstrated: the recovery for re-use of acetone (and similar solvents) from industrial waste streams using a carbon based molecular sieve; and the separation and destruction of trichloroethylene using ZSM-5 synthetic zeolite catalyst, a predominant halocarbon environmental contaminant. Based upon these results, Phase II development is strongly recommended.
Document ID
19960045813
Document Type
Contractor Report (CR)
Authors
Atwater, James E. (Umpqua Research Co. Myrtle Creek, OR United States)
Holtsnider, John T. (Umpqua Research Co. Myrtle Creek, OR United States)
Wheeler, Richard R., Jr. (Umpqua Research Co. Myrtle Creek, OR United States)
Date Acquired
September 6, 2013
Publication Date
August 15, 1996
Subject Category
Environment Pollution
Report/Patent Number
URC-80647
NAS 1.26:201945
NASA-CR-201945
Funding Number(s)
CONTRACT_GRANT: NAS2-14374
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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