1. Influence of HCl on thermal decomposition of PCDDs/PCDFs in fly ash from MSW incinerator
- Author
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Y. Ogaki, H. Yamaguchi, E. Shibuya, K. Okuyama, and K. Hamaguchi
- Subjects
Flue gas ,Environmental Engineering ,Health, Toxicology and Mutagenesis ,Thermal decomposition ,Public Health, Environmental and Occupational Health ,Boiler (power generation) ,chemistry.chemical_element ,Electrostatic precipitator ,General Medicine ,General Chemistry ,Pollution ,Nitrogen ,Incineration ,Waste treatment ,chemistry ,Fly ash ,Environmental chemistry ,Environmental Chemistry ,Nuclear chemistry - Abstract
Fly ash from an electrostatic precipitator in a MSW incinerator was heated at 573–773K for 2–60 minutes in various test gases (nitrogen, air or simulated flue gas (O 2 10%, N 2 82%, CO 2 8%)) with or without 500 or 1000ppm HCl and 20% H 2 O. Thermal decomposition behavior of PCDDs/PCDFs in fly ash was studied. In any test gas, PCDDs/PCDFs decomposed rapidly at over 673K regardless of HCl presence. Detoxification of PCDDs/PCDFs was more inhibited in simulated flue gas with 1000ppm HCl than in nitrogen or air but concentration of PCDDs/PCDFs decreased to less than 0.01ng-TEQ/g at 773K. Furthermore, it was demonstrated that dioxins in fly ash decomposed almost completely at the bottom of boiler section in a MSW incinerator.
- Published
- 1994
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