Abstract
Combustion experiments using a laboratory-scale fluidized-bed reactor were performed to elucidate the influence of chlorine content in model wastes in a different combustion temperature on homologue profiles of polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs) during incineration. As the Cl content in the model waste increased, CO concentration in flue gas and the amount of PCDD/Fs formed increased and the homologue profiles of PCDD/Fs were shifted toward higher chlorinated species. When the combustion temperature was low, the CO concentration and the amount of PCDD/Fs formed decreased. Additionally, their homologue profiles were shifted toward lower chlorinated species. The degree of chlorination of PCDD/Fs becomes low with the combustion temperature. This is caused by the changes of combustion reactions in the furnace, which lead to the changes of CO concentration in flue gas. Combustion reactions have a greater influence on the homologue profiles of PCDD/Fs than the amount of chlorine supplied.
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