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A Study of Polychlorinated dibenzo-p-dioxins(PCDDs) and Polychlorinated dibenzofurans(PCDFs) Formation from Phenols in Thermal Process[I]  

Ryu, Jae-Yong (Environmental Research Team, Daegu-Gyeongbuk Development Institute)
Suh, Jeong-Min (Department of Regional Environmental System, Pusan National University)
Park, Jeong-Ho (Department of Environmental Engineering, Jinju National University)
Publication Information
Journal of Korean Society of Environmental Engineers / v.28, no.5, 2006 , pp. 511-521 More about this Journal
Abstract
Homologue and isomer patterns of polychlorinated dibenzo-p-dioxins(PCDDs) and polychlorinated dibenzofurans(PCDFs) congeners formed from phenols in the gas-phase at $600{\sim}700^{\circ}C$ and via particle-mediated reactions at $400^{\circ}C$ were studied in an isothermal flow reactor. A mixture of 20 phenols in relative concentrations found in a municipal waste incinerator(MWI) stack gas was used for this study. PCDDs and PCDFs homologue and isomer patterns obtained from the phenol. From the phenol experiments, gas-phase formation at $600{\sim}700^{\circ}C$ favors PCDFs formation whereas particle-mediated formation at $400^{\circ}C$ favors PCDDs formation. DD and DF were most abundant homologue groups, PCDDs and PCDFs homologue fraction decreased with increasing number of chlorine substituents. PCDDs and PCDFs homologue and isomer fractions were almost constant from gas-phase formation and particle-mediated formation. Unsubstituted phenol, which was present in high concentration, played a significant role in the formation of PCDD/Fs congeners under both sets of experimental conditions.
Keywords
PCDDs; PCDFs; Chlorinated Phenols; Homologue & Isomer Patterns;
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