Emission of Polychlorinated Dibenzo-p-Dioxins (PCDDs) and Polychlorinated Dibenzofurans (PCDFs) from Underfiring System of Coke Oven Battery
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Institute of Chemical Processing of Coal, Zamkowa 1, 41-800 Zabrze, Poland
Silesian University of Technology, Faculty of Chemistry, Department of Inorganic Chemistry, Analytical Chemistry and Electrochemistry, Krzywoustego 6, Gliwice, Poland
Rafał Bigda   

Institute of Chemical Processing of Coal, Zamkowa 1, 41-800 Zabrze, Poland
Publication date: 2017-11-01
J. Ecol. Eng. 2017; 18(6):21–29
A coke oven battery is not considered as a significantsource of polychlorinated diben-zo-p-dioxins (PCDDs) and polychlorinated dibenzofurans (PCDFs) emissions; how-ever, due to small amounts of chlorine in coal dioxins, dibenzofurans may be formed. The paper presents the attempts to determine the level of emission of PCDDs/PCDFs from the COB underfiringsystem and to confront the obtained results with the cal-culations based on the mass balance of chlorine in the coking process and reactions of both chlorophenols formation and PCDDs and PCDFs formation from mono- and polychlorophenols. There were PCDDs/PCDFs concentrations measured in fluegases from the underfiringsystem of two COBs at a Polish coking plant. The measure-ments included both an old and a new battery. The obtained concentrations of PCDDs/PCDFs were lower than reported in the literature (0.5–1.7 ng I-TEQ/Mgcoke), while the results for old COB were on average 3 times higher than for the new one. It was found that PCDDs/PCDFs emission from COB underfiringsystem is insignificantand that PCDDs/PCDFs formation during coal coking should consider the mechanisms of their formation from mono- and polychlorophenols, as well as the influenceof process parameters on the synthesis.