Scores:
12
MNiSW
120.9
ICV
 
 

Emission of Polychlorinated Dibenzo-p-Dioxins (PCDDs) and Polychlorinated Dibenzofurans (PCDFs) from Underfiring System of Coke Oven Battery

Rafał Bigda 1  ,  
Wojciech Urbańczyk 2  ,  
Andrzej Mianowski 1  ,  
 
1
Institute of Chemical Processing of Coal, Zamkowa 1, 41-800 Zabrze, Poland
2
Silesian University of Technology, Faculty of Chemistry, Department of Inorganic Chemistry, Analytical Chemistry and Electrochemistry, Krzywoustego 6, Gliwice, Poland
J. Ecol. Eng. 2017; 18(6):21–29
Publish date: 2017-11-01
KEYWORDS:
TOPICS:
ABSTRACT:
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.
CORRESPONDING AUTHOR:
Rafał Bigda   
Institute of Chemical Processing of Coal, Zamkowa 1, 41-800 Zabrze, Poland