Accession Number : ADD015064

Title :   Large Scale Purification of Contaminated Air.

Descriptive Note : Patent Application, Filed 23 Aug 91,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Uhm, Han S ; Brown, Matt D

Report Date : 23 Aug 1991

Pagination or Media Count : 31

Abstract : This patent application discloses an invention related to purification of contaminated air on a large scale basis by exposure to the decomposing action of microwave energy generated plasma. A weakly ionized plasma is generated by continuous high-power microwave within a dielectric cavity positioned in a slow waveguide. Contaminated air under atmospheric pressure is exposed to the plasma within the waveguide cavity for a limited saturation time controlled by inflow at a regulated flow rate. During such limited saturation time, the contaminated air is purified by sequential ionization and recombination under an electron temperature resulting in a microwave discharge plasma dominated by atomic oxygen at a relatively high saturation density level together with atomic nitrogen at a relatively low density level.

Descriptors :   AIR, ATOMIC PROPERTIES, BAROMETRIC PRESSURE, CAVITIES, CONTAMINATION, DENSITY, DIELECTRICS, ELECTRON ENERGY, ENERGY, EXPOSURE(GENERAL), FLOW RATE, GLOW DISCHARGES, HIGH POWER, IONIZATION, LOW DENSITY, LOW LEVEL, MICROWAVES, NITROGEN, OXYGEN, PATENT APPLICATIONS, PLASMAS(PHYSICS), PURIFICATION, SATURATION, SEQUENCES, TIME, WAVEGUIDES

Subject Categories : Air Pollution and Control
      Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE