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Recent findings on the formation and decomposition of PCDD/PCDF in municipal solid waste incineration |
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| Institution: | 1. State Key Laboratory of Biogeology and Environmental Geology, School of Earth Sciences, China University of Geosciences, Wuhan 430074, PR China;2. Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, PR China;3. Geowissenschaftliches Zentrum, Göttingen Universität, Göttingen 37077, Germany |
| Abstract: | The thermal formation of PCDD/PCDF in fly ashes of refuse incineration plants preferably in the low-temperature region of the boiler at 3002C is fully confirmed. Important parameters for the reaction of formation are the oxygen content and the water vapor in the offgas. Elemental carbon in the fly ash acts as an adsorbent to the precursor compounds. The oxidation of carbon may serve as a basis for the mechanism of PCDD/PCDF formation. Both reactions proceed by the Deacon process scheme. The catalytic action of CuCl2 can be counteracted by the addition of NH3. |
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