- 作者: 黃武章,劉育維,劉俊志
- 作者服務機構: Department of Environmental Engineering and Science, National Ping-Tun University of Science and Technology, 912 Ping-Tun, Taiwan, R.O.C.
- 中文摘要: In this study the baghouse ash (fly ash) from municipal solid waste incineration (MSWI) plants was heated in a fixed bed reactor, from 25 °C to 800 °C. An optical fiber UV/VIS spectrometer was employed as the real-time monitor to probe the emission behaviors of organic compounds. A two-dimensional (2D) correlation technique was used to specify organic matter existing in exhausted gas. Three adsorbents, including water, acetone and cyclohexane, were used to adsorb the organic and molecular chlorine in the gas emitted from the reactor. Concentrations of molecular chlorine (Cl2), total organic carbon (TOC), and total inorganic carbon (TIC) in these adsorbents were analyzed to evaluate the reactions occurring in fly ash. We have found that generation temperatures of molecular chlorine were found mainly at 200 °C and 750 °C, which are attributed to the dechlorination of chlorinated-organic compounds and vaporization of heavy metal chlorides, respectively. 2D correlation UV/VIS spectra are useful to extract valuable information from the one-dimensional UV/VIS of emitted gas. The identified organic species would be diethylamine, dibenzo-p-dioxin, thioxanthone, 1,4-dichloro-anthraquinone, benzene, 1-naphthalene azo, azulene, dibenzanthrone, 1-chloro-4-notroso-benzene and 4-nitro-toluene. The emission behaviors of dibenzo-p-dioxin, thioxanthone, azulene and dibenzanthrone were reported, and we concluded that the chlorine emission is almost always earlier than the release of these UV/VIS-sensitive organic compounds.
- 英文摘要: --
- 中文關鍵字: Fly ash; Dechlorination; Free chlorine.
- 英文關鍵字: --