Further studies of NO sub x control in aqueous scrubbers using ferrouster dot EDTA
Argonne National Laboratory has been conducting research on combined nitrogen oxides (NO{sub x}) and sulfur dioxide (SO{sub 2}) control systems. The research program has recently been focused on studies of aqueous scrubber systems enhanced with chemical additives to promote NO{sub x} removal. Tests have been conducted in a laboratory-scale scrubber system using experimental conditions selected to simulate the scrubbing of flue gas from high-sulfur coal combustion. Last year we reported the first studies performed with ferrous ethylenediaminetetraacetic acid (Fe(2){center dot}EDTA) combined with an antioxidant/reducing agent in a sodium-carbonate chemistry. This year we initiated work with Fe(2){center dot}EDTA in a lime chemistry. We found that the previously studied antioxidant/reducing agents were not as effective in a lime chemistry as they were in a sodium-carbonate chemistry. Therefore, several new antioxidant candidates were identified and screened in our aqueous scrubber system. In this paper, we compare the results obtained last year for Fe(2){center dot}EDTA alone in sodium carbonate with results obtained recently in a lime scrubber chemistry. The improvements in performance possible through the use of antioxidant/reducing agents in combination with the Fe(2){center dot}EDTA will also be discussed and used as the basis for some conclusions regarding the important chemical mechanisms. 5 refs., 6 figs.
- Research Organization:
- Argonne National Lab., IL (United States)
- Sponsoring Organization:
- USDOE; USDOE, Washington, DC (USA)
- DOE Contract Number:
- W-31109-ENG-38
- OSTI ID:
- 5626977
- Report Number(s):
- ANL/CP-73248; CONF-9107134-2; ON: DE91015555
- Resource Relation:
- Conference: 7. annual coal preparation, utilization, and environmental control contractors conference, Pittsburgh, PA (United States), 15-18 Jul 1991
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
01 COAL, LIGNITE, AND PEAT
54 ENVIRONMENTAL SCIENCES
EDTA
PERFORMANCE
FLUE GAS
SCRUBBING
NITROGEN OXIDES
AIR POLLUTION CONTROL
ADDITIVES
ANTIOXIDANTS
CALCIUM HYDROXIDES
IRON COMPOUNDS
SODIUM COMPOUNDS
ALKALI METAL COMPOUNDS
ALKALINE EARTH METAL COMPOUNDS
AMINO ACIDS
CALCIUM COMPOUNDS
CARBOXYLIC ACIDS
CHALCOGENIDES
CHELATING AGENTS
CONTROL
GASEOUS WASTES
HYDROGEN COMPOUNDS
HYDROXIDES
NITROGEN COMPOUNDS
ORGANIC ACIDS
ORGANIC COMPOUNDS
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
TRANSITION ELEMENT COMPOUNDS
WASTES
200202* - Fossil-Fueled Power Plants- Waste Management- Noxious Gas & Particulate Emissions
010800 - Coal
Lignite
& Peat- Waste Management
540120 - Environment
Atmospheric- Chemicals Monitoring & Transport- (1990-)