||Effect of Metal Catalysts on the Formation of Polychlorinated Dibenzo-p-Dioxin and Polychlorinated Dibenzofuran Precursors.
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.
Fly ash ;
Air pollution control ;
Municipal wastes ;
Waste disposal ;
Copper compounds ;
Experimental design ;
Toxic substances ;
Polychlorinated dibenzodioxins ;
Polychlorinated dibenzofurans ;
Chemical reaction mechanisms
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The paper gives results of an examination of the catalytic effects of copper and iron compounds for their behavior in promoting formation of chlorine (C12), the major chlorinating agent of polychlorinated dibenzo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs), in an environment simulating that of municipal waste fly ash. C12 formed as a result of a metal-catalyzed reaction of HC1 with O2. Catalytic activity was greatest at a temperature of about 400 C, supporting a theory of de novo synthesis of PCDDs and PCDFs on fly ash particles downstream of waste combustion.