Oxydation de pyrolyse du dibenzofurane à trés faibles concentrations : application à la réduction des émissions de dioxines

Abstract : "Dioxins" (PCDD/F) are persistent organic pollutants which are emitted in the atmosphere by several combustion and thermal processes. The present study concerns the oxidation and the pyrolysis of dibenzofuran which is chosen as a model molecule of polychrorodibenzofurans. The reaction is studied at very low concentration of dibenzofuran (~2 ppm) in a continuous perfectly stirred reactor between 3s and 5s, whereas temperature is ranging from 500°C to 950°C. During dibenzofuran decomposition, several intermediary species are formed; they are identified by GC/MS and then quantified by TD/GC/FID. The main products are derivatives of benzofuran, polyaromatic hydrocarbons and other volatile organic compounds. Taking into account our experimental results and the literature data, we have proposed and validated a detailed mechanism of DBF reaction. This mechanism is used to model the abatement of dioxins by total oxidation in the postcombustion area of a municipal waste incinerator
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Audrey Tritz. Oxydation de pyrolyse du dibenzofurane à trés faibles concentrations : application à la réduction des émissions de dioxines. Autre. Université de Lorraine, 2014. Français. ⟨NNT : 2014LORR0014⟩. ⟨tel-01750673⟩

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