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RECORD NUMBER: 4 OF 8

OLS Field Name OLS Field Data
Main Title Effect of Sulfur Dioxide on the Formation Mechanism of Polychlorinated Dibenzodioxin and Dibenzofuran in Municipal Waste Combustors.
Author Gullett, B. K. ; Bruce, K. R. ; Beach, L. O. ;
CORP Author Acurex Corp., Research Triangle Park, NC.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
Publisher c1992
Year Published 1992
Report Number EPA-68-DO-0141; EPA/600/J-92/410;
Stock Number PB93-131852
Additional Subjects Polychlorinated dibenzodioxins ; Polychlorinated dibenzofurans ; Municipal wastes ; Waste disposal ; Air pollution abatement ; Combustors ; Sulfur dioxide ; Combustion products ; Catalysts ; Experimental design ; Chlorine organic compounds ; Chemical reactions ; Combustion kinetics ; Reprints ; Chemical reaction mechanisms
Holdings
Library Call Number Additional Info Location Last
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Status
NTIS  PB93-131852 Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy. NTIS 06/08/1993
Collation 8p
Abstract
The paper gives results of an investigation of the effect of SO2 on the formation mechanism of polychlorinated dibenzodioxin (PCDD) and polychlorinated dibenzofuran (PCDF) in the post-combustion, downstream region (500 to 300 C) of a municipal waste combustor (MWC). Laboratory experiments simulating the flue gases and particle environment of an MWC examined PCDD production under varying conditions. Effects on the concentration of the organic-chlorinating constituent, Cl2, through both homogeneous reaction with SO2 and deactivation of a Cl2-forming catalyst, Cu(II), were examined. Experimental results suggest that the reaction of Cu(II) with SO2 to form CuSO4 renders the catalyst less active, decreasing PCDD formation by minor amounts. However, this inactivity is not the result of decreased Cl2 formation, but rather of reduced ability of Cu(II) to promote a second catalytic step of biaryl synthesis. These findings suggest that the apparent lack of PCDD and PCDF in the emissions from coal-fired combustors may be due to the relatively high concentrations of SO2. (Copyright (c) 1992 American Chemical Society.)