Influence of elemental sulfur on the de-novo-synthesis of organochlorine compounds from residual carbon on fly ash

Article abstract of DOI:10.1016/S0045-6535(98)00280-X

Thermal experiments between 300°C and 500°C were performed with fly ash of a municipal waste incineration plant which had been spiked with elemental sulfur. The influence of elemental sulfur on the heterogeneous carbon-decomposition and the de-novo-synthesis of polychlorinated compounds was investigated. Compounds such as polychlorinated dibenzodioxins, dibenzofurans, benzenes, benzoand dibenzothiophenes, Cl₄-thiophene, Cl₄- thienothiophene, Cl₇- and Cl₈-phenylthiophene were quantified. Apart from those, other intermediate structures were determined. These compounds are mainly aromatics with a vinyl- or butadienyl-group, stabilized by perchlorination. In detail, the compounds are Cl_7- and Cl₈-styrene, Cl₁₀-vinylnaphthalenes, Cl₁₀-phenylbutadiene, Cl₁₀-octatetraene, Cl₁₀-bis-butadienylsulfides and Cl₁₂-stilbenes.