Accession Number : ADD017954

Title :   Large Scale Purification of Contaminated Air.

Descriptive Note : Patent, Filed 10 May 95, patented 26 Dec 95,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON DC

Personal Author(s) : Uhm, Han S

Report Date : 26 Dec 1995

Pagination or Media Count : 13

Abstract : 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 :   *PLASMAS(PHYSICS), *DIELECTRICS, *MICROWAVES, *CAVITIES, *NITROGEN, *OXYGEN, *CONTAMINATION, *ATOMIC PROPERTIES, *PLASMA GENERATORS, *PATENTS, *AIR POLLUTION CONTROL EQUIPMENT, DENSITY, EXPOSURE(GENERAL), AIR POLLUTION, AIR, WAVEGUIDES, MICROWAVE EQUIPMENT, SEQUENCES, SATURATION, TIME, ELECTRON ENERGY, PURIFICATION, FLOW RATE, LOW LEVEL, IONIZATION, LOW DENSITY, GLOW DISCHARGES, POLLUTION ABATEMENT, RADIOFREQUENCY POWER

Subject Categories : Air Pollution and Control
      Plasma Physics and Magnetohydrodynamics

Distribution Statement : APPROVED FOR PUBLIC RELEASE