This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Microwave-Powered Thermal Regeneration of Sorbents for CO2, Water Vapor and Trace Organic Contaminants
Annotation ability available
Sector:
Language:
English
Abstract
Feasibility of the use of microwave heating to achieve fast and efficient thermal regeneration of sorbents for the removal of carbon dioxide, water vapor, and trace organics from contaminated air streams has been conclusively demonstrated. The use of microwave power offers several advantages, including: improved heat transfer, lower thermal losses, improved power utilization, and enhanced operational capabilities. During the initial research, the sorption and microwave-powered thermal desorption of acetone, trichloroethylene (TCE), carbon dioxide, and water vapor was studied at 2.45 GHz using a rectangular waveguide based test apparatus. Both activated carbon and Carbosieve S-III were identified as excellent microwave regenerable sorbents for use in the removal of airborne organics. Water loaded silica gel, Molecular Sieve 13X, and Molecular Sieve 5A were also effectively regenerated under microwave irradiation at this frequency. Molecular Sieve 5A and a carbogenic molecular sieve prepared at NASA's Jet Propulsion Laboratory were identified as viable microwave regenerable carbon dioxide (CO2) sorbents. A sorbent bed containing multiple media was challenged with air containing 0.5% CO2, 300 parts per million (ppm) acetone, 50 ppm TCE, and saturated with water vapor. The layered media bed was shown to effectively purify the contaminated air stream and to be completely regenerated by microwave induced heating. Spectral studies of the reflection, transmission, and phase shifts of microwaves for a variety of sorbents over the frequency range between 1.3 - 2.7 GHz were performed.
Authors
Topic
Citation
Atwater, J., Holtsnider, J., Wheeler, R., and Luna, B., "Microwave-Powered Thermal Regeneration of Sorbents for CO2, Water Vapor and Trace Organic Contaminants," SAE Technical Paper 972430, 1997, https://doi.org/10.4271/972430.Also In
References
- Carslaw, H.S. Jaeger, J.C. Conduction of Heat in Solids 2nd Clarendon Press Oxford 1959
- von Hippel, A. Dielectrics and Waves Wiley New York 1954
- von Hippel, A. Dielectric Materials and Applications Technology Press of MIT Cambridge 1954
- Tsang, L. Kong, J.A. Scattering of Electromagnetic Waves from Random Media with Strong Permittivity Fluctuations Radio Sci. 16 3 303 320 1981
- Bergman, D.J. The Dielectric Constant of a Composite Material - A Problem in Classic Physics Phys. Lett. C 43 9 377 407 1978
- Polder, D. Van Santen, J.H. The Effective Permeability of Mixtures of Solids Physica 12 5 257 271 1946
- Taylor, L.S. Dielectric Properties of Mixtures IEEE Trans. Antennas Propagat. AP-13 6 943 947 1965
- Stogryn, A. The Bilocal Approximation for the Effective Dielectric Constant of an Isotropic Random Medium IEEE Trans. Antennas Propagat. AP-32 5 517 520 1984
- Nost, B. Hansen, B.D. Haslund, E. Dielectric Dispersion of Composite Material Physica Scripta T44 67 70 1992
- Foley, H.C. Carbogenic Molecular Sieves: Synthesis, Properties, and Applications Microporous Mater. 4 407 433 1995
- Atwater, J.E. Holtsnider, J.T. Airbome Trace Organic Contaminant Removal Using Thermally Regenerable Multi-Media Layered Sorbents SAE Trans. J. Aerosp. 100 1726 1991
- Atwater, J.E. Holtsnider, J.T. Simple Models for the Breakthrough of Humidified Acetone and Ethyl Acetate on a Carbon Based Molecular Sieve Carbon 34 6 824 825 1996