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RECORD NUMBER: 209 OF 1152

OLS Field Name OLS Field Data
Main Title Computational and Experimental Study of Mercury Speciation as Facilitated by the Deacon Process.
Author Ghorishi, S. B. ; Edwards, J. R. ; Srivastava, R. K. ; Lee, C. W. ; Kilgroe, J. D. ;
CORP Author North Carolina State Univ. at Raleigh. Dept. of Mechanical and Aerospace Engineering. ;ARCADIS Geraghty and Miller, Inc., Research Triangle Park, NC.;Environmental Protection Agency, Research Triangle Park, NC. National Risk Management Research Lab.
Publisher Aug 2001
Year Published 2001
Report Number EPA-68-C-99-201; EPA/600/A-01/111;
Stock Number PB2002-102289
Additional Subjects Mercury(Metal) ; Air pollution ; Exposure pathways ; Flue gases ; Air pollution control ; Fly ash ; Iron oxides ; Combustion kinetics ; Catalysis ; Chlorination ; Trends ; Stationary sources ; Speciation ; Deacon process
Internet Access
Description Access URL
https://nepis.epa.gov/Exe/ZyPDF.cgi?Dockey=P100TDYX.PDF
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NTIS  PB2002-102289 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 10/23/2002
Collation 18p
Abstract
The paper gives results of a computational and experimental study of mercury (Hg) speciation as facilitated by the Deacon process. Fly ashes that contain trace cupric or ferric oxide are effective catalysts for elemental mercury (Hg) conversion to mercuric chloride in the presence of hydrogen chloride, even at low reactor temperatures (less than 250C). Since these same trace metals promote chlorine (C12) gas formation through the Deacon process, it is possible that this process, combined with gas-phase Hg chlorination pathways, can explain such speciation trends. In support of this hypothesis, experiments were conducted to determine if direct reactions of Hg with C12 gas are possible at low temperatures and if appreciable Hg is captured onto the model fly ash surface. These results are used to develop and refine a chemical kinetics model for Hg speciation as driven by chlorination induced by the Deacon process.