Abstract
Most of environmental organic chemicals generally have chloride in their structure. Therefore, we should research the chlorination mechanism of carbon. Most dioxins are concentrated in collected fly ash at post-combustion zone during the process of a municipal solid waste incinerator. In this paper, we report on the application of the Cl-K near-edge X-ray absorption fine structure (NEXAFS) in order to understand the chlorination mechanism of carbon in fly ash. It has been revealed that the separation of the chloride form bonded with organic carbon (C-Cl) was easy due to a peak of the Cl-K NEXAFS spectrum. A chlorination effect can be estimated by using Cl-K NEXAFS without depending on metal species. An analysis of the Cl-K NEXAFS spectrum showed a reduction of copper(II) chloride at 300°C and the oxidation of iron(III) chloride at 400°C, related to chlorination process of carbon.
