首页> 中文期刊>中国高等学校学术文摘·能源与动力工程 >Experimental study on low temperature thermal treatment of polychlorinated dibenzo-p-dioxins and dibenzofurans(PCDD/Fs) in fly ash

Experimental study on low temperature thermal treatment of polychlorinated dibenzo-p-dioxins and dibenzofurans(PCDD/Fs) in fly ash

     

摘要

The effects of temperature and time on polychlorinated dibenzo-p-dioxins and dibenzofurans (PCDD/Fs)distribution in fly ash of a municipal solid waste incinerator(MSWI) were studied in a tubular oven under nitrogen atmosphere.The PCDD/Fs in the gas phase and solid phase were detected by high-resolution gas chromatography coupled with low resolution mass spectrometry (HRGC/LRMS)separately.The experimental results showed that the major congener was octa-chlorinated dibenzo-p-dioxin (OCDD) in the gas phase and the low chlorinated congeners were the major products in the solid phase.There were high levels of OCDD in the gas phase in several experimental conditions althoughthe PCDD/Fs in the solid phase could be decomposed.The optimum condition for PCDD/Fs decomposition in fly ash was a heating time of 60 min at 400 ℃ under nitrogen atmosphere.

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