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RECORD NUMBER: 11 OF 20

Main Title Mercury Speciation in Combustion Systems: Studies with Simulated Flue Gases and Model Fly Ashes.
Author Ghorishi, S. B.; Lee, C. W.; Kilgroe, J. D.;
CORP Author ARCADIS Geraghty and Miller, Inc., Research Triangle Park, NC.;Environmental Protection Agency, Research Triangle Park, NC. Air Pollution Prevention and Control Div.
Publisher 1999
Year Published 1999
Report Number EPA-68-D4-0005; EPA/600/A-99/049;
Stock Number PB99-163081
Subjects Flue gases; Fly ash; Mercury(Metal); Combustion kinetics; Combustion products; Oxidation; Combustion chemistry; Hydrogen chloride; Nitrogen oxides; Sulfur dioxide; Water vapor; Chemical reactivity; Air pollution monitoring;
Holdings
Library   Call Number Additional Info Location Date Modified
NTIS PB99-163081 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 05/04/2000
Collation 20p
Abstract The paper gives results of a bench-scale study of the effects of flue gas and fly ash parameters on the oxidation of elemental mercury in simulated flue gases containing hydrogen chloride (HCl), nitric oxide (NO), nitrogen dioxide (NO2), sulfur dioxide (SO2), and water vapor (H2O). Gas-phase studies indicated that elemental mercury, in the presence of these gaseous species, oxidizes very slowly at low to moderate temperatures (25-350 C). In the presence of HCl, elemental mercury oxidation proceeds at measurable rates only at high temperatures (>700 C) and high HCl concentrations (>200 ppm). SO2 and H20 in the simulated flue gas significantly inhibits the gas-phase oxidation of elemental mercury in the presence of HCl. The effects of fly ash composition were investigated using a fixed bed containing model fly ashes consisting of mixtures of major components found in coal fly ashes. Work to date has focused on the potential catalytic oxidation of elemental mercury in a temperature range of 150-250 C by two- and three-component model fly ashes composed of mixtures of alumina, silica, ferric oxide, cupric oxide, and calcium oxide.
Supplementary Notes Presented at the Air and Waste Management Association annual meeting, St. Louis, MO., June 20-24, 1999. See also DE91527217 and PB99-144347. Sponsored by Environmental Protection Agency, Research Triangle Park, NC. Air Pollution Prevention and Control Div.
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NTIS Title Notes Rept. for Apr 97-Sep 98.
Category Codes 68A; 81A; 99F
NTIS Prices PC A03/MF A01
Primary Description 600/13
Document Type NT
Control Number 930200890
Cataloging Source NTIS/MT
Origin NTIS
Type CAT