Combined removal of SO/sub 2/, NO/sub x/, and fly ash from simulated flue gas using pulsed streamer corona
A pulse-energized electron reactor which utilizes pulsed streamer corona has been developed for the combined removal of SO/sub 2/, NO/sub x/, and particles from effluent gases. In the pulse-energized electron reactor process, fast-rising narrow high-voltage pulses are superimposed on a dc-bias voltage and applied to a nonuniform electric field geometry to generate pulsed streamer corona. The pulsed streamer corona produces energetic free electrons, which dissociate gas molecules, forming radicals. These radicals cause chemical reactions that convert SO/sub 2/ and NO/sub x/ into acid mists and/or solids, which can be removed from the gas stream by conventional means. The pulsed streamer corona also produces ions, and between pulses the ions charge the fly-ash particles, which are then collected by the dc-bias field. In pulse-energized electron reactor performance tests on a humid air stream with an initial SO/sub 2/ concentration of 1000 ppm, more than 90 percent of the SO/sub 2/ was removed with an advantageously small power requirement. Combined treatment performance was demonstrated by introducing high-resistivity fly-ash into the gas stream. The fly-ash collection efficiency of the pulse-energized electron reactor was significantly better than that of a conventional dc wire-cylinder electrostatic precipitator when the electrodes of both were covered with a high-resistivity layer.
- Research Organization:
- Appalachian State Univ., Boone, NC (USA). Dept. of Physics; Toyohashi Univ. of Technology (Japan). Dept. of Electrical Engineering; Florida State Univ., Tallahassee, FL (USA). Dept. of Physics
- OSTI ID:
- 5894315
- Journal Information:
- IEEE Trans. Ind. Appl.; (United States), Vol. 25
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
02 PETROLEUM
CHEMICAL REACTORS
DESIGN
ELECTROSTATIC PRECIPITATORS
FLUE GAS
AIR POLLUTION CONTROL
NITROGEN OXIDES
REMOVAL
SULFUR DIOXIDE
ENERGY CONVERSION
CHEMICAL EFFLUENTS
ELECTRIC FIELDS
ELECTRONS
FLY ASH
GEOMETRY
IONS
AEROSOL WASTES
ASHES
CHALCOGENIDES
CHARGED PARTICLES
CONTROL
CONVERSION
ELEMENTARY PARTICLES
EQUIPMENT
FERMIONS
GASEOUS WASTES
LEPTONS
MATHEMATICS
NITROGEN COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
RESIDUES
SULFUR COMPOUNDS
SULFUR OXIDES
WASTES
424000* - Engineering- Pollution Control Equipment- (1980-1989)
320305 - Energy Conservation
Consumption
& Utilization- Industrial & Agricultural Processes- Industrial Waste Management
020800 - Petroleum- Waste Management