||Effect of Sulfur Dioxide on the Formation Mechanism of Polychlorinated Dibenzodioxin and Dibenzofuran in Municipal Waste Combustors.
Gullett, B. K.;
Bruce, K. R.;
Beach, L. O.;
||Acurex Corp., Research Triangle Park, NC.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
Air pollution abatement;
Chlorine organic compounds;
Chemical reaction mechanisms
||Most EPA libraries have a fiche copy filed under the call number shown. Check with individual libraries about paper copy.
||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.)
||Pub. in Environmental Science and Technology, v26 n10 p1938-1943 1992. See also PB89-239223. Sponsored by Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
|NTIS Title Notes
||Reprint: Effect of Sulfur Dioxide on the Formation Mechanism of Polychlorinated Dibenzodioxin and Dibenzofuran in Municipal Waste Combustors.
||68A; 68C; 81A; 99F
||PC A02/MF A01