||Computational and Experimental Study of Mercury Speciation as Facilitated by the Deacon Process.
Ghorishi, S. B.;
Edwards, J. R.;
Srivastava, R. K.;
Lee, C. W.;
Kilgroe, J. D.;
||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.
Air pollution control;
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||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.
||Presented at the A&WMA Speciality Conference on Mercury Emissions: Fate, Effects, and Control, Chicago, IL., August 21-23, 2001. Prepared in cooperation with ARCADIS Geraghty and Miller, Inc., Research Triangle Park, NC. Sponsored by Environmental Protection Agency, Research Triangle Park, NC. National Risk Management Research Lab.
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||68A; 81A; 99B; 97K
||PC A03/MF A01