TY - JOUR
TI - Dioxin emissions from coal combustion in domestic stove: Formation in the chimney and coal chlorine content influence
AU - Paradiž Boštjan
AU - Dilara Panagiota
AU - Umlauf Gunther
AU - Bajsić Ivan
AU - Butala Vincenc
JN - Thermal Science
PY - 2015
VL - 19
IS - 1
SP - 295
EP - 304
PT - Article
AB - Combustion experiments conducted in domestic stove burning hard coal  demonstrated a predominant influence of the coal chlorine content on the  PCDD/F emissions, together with a pronounced effect of the flue gas  temperature. PCDD/F concentrations of over 100 ng TEQ/m3, three orders of  magnitude higher than in a modern waste incinerator, were measured in the  flue gases of a domestic stove when combusting high chlorine coal (0.31 %).  The PCDD/F concentrations in the flue gases dropped below 0,5 ng TEQ/m3, when  low chlorine coal (0.07 %) was used. When low chlorine coal was impregnated  with NaCl to obtain 0.38 % chlorine content, the emission of the PCDD/Fs  increased by two orders of magnitude. Pronounced nonlinearity of the PCDD/F  concentrations related to chlorine content in the coal was observed. The  combustion of the high chlorine coal yielded PCDD/F concentrations in flue  gases one order of magnitude lower in a fan cooled chimney when compared to  an insulated one, thus indicating formation in the chimney. The influence of  flue gas temperature on the PCDD/F emissions was less pronounced when burning  low chlorine coal. The predominant pathway of the PCDD/F emissions is via  flue gases, 99 % of the TEQ in the case of the high chlorine coal for  insulated chimney.