Pulse-energized wet tubular electrostatic precipitator for NOx emission control

Journal Article · · Environmental Progress

DOI:https://doi.org/10.1002/ep.670180211· OSTI ID:6178884

Yang, C L ^[1]

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1. Beltran Associates, Inc., Brooklyn, NY (United States)

A tubular plasma reactor was used to evaluate the feasibility of oxidizing nitric oxide (NO) by corona discharge. The DC corona completely oxidized 115 ppm of NO to nitrogen dioxide (NO[sub 2]) in an air stream at a voltage of 11 kV. The NO[sub 2] was further oxidized to nitrate at a voltage of 13 kV. In some cases, the residual NO[sub 2] in the effluents of the plasma reactor was removed quantitatively by absorption in aqueous caustic sodium sulfite. The outlet concentrations of both NO and NO[sub 2] from the combined corona discharge and aqueous absorption system were beyond the detection limit of a chemiluminescent NOx analyzer. Both NO oxidation and NO[sub 2] absorption were confirmed in a pilot-scale wet tubular electrostatic precipitator (WESP) that has a 4-foot high corona discharge section and a 5-foot high gas absorption section. The flue gas from the sewage sludge incinerator, containing 8 ppm NO and 78 ppm NO[sub 2], was tested in the system. The WESP was energized with a pulsed power supply to avoid premature spark-over. In the plasma discharge section, 79% of the NO[sub 2] was reduced while virtually 100% of the NO was oxidized at a pulse voltage of 55 kV. The outlet concentration of NO[sub 2] from the absorption section was 2 ppm.

• OSTI ID: 6178884
• Journal Information: Environmental Progress, Journal Name: Environmental Progress Vol. 18:2; ISSN 0278-4491; ISSN ENVPDI
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
320305* -- Energy Conservation
Consumption
& Utilization-- Industrial & Agricultural Processes-- Industrial Waste Management
320604 -- Energy Conservation
Consumption
& Utilization-- Municipalities & Community Systems-- Municipal Waste Management-- (1980-)
AIR POLLUTION ABATEMENT
BIOLOGICAL MATERIALS
BIOLOGICAL WASTES
CHALCOGENIDES
CHEMICAL REACTORS
ELECTROSTATIC PRECIPITATORS
EQUIPMENT
FLUE GAS
GASEOUS WASTES
MATERIALS
NITROGEN COMPOUNDS
NITROGEN OXIDES
OXIDES
OXYGEN COMPOUNDS
PERFORMANCE TESTING
POLLUTION ABATEMENT
POLLUTION CONTROL EQUIPMENT
SEWAGE
SEWAGE SLUDGE
SLUDGES
TESTING
WASTES