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    Please use this identifier to cite or link to this item: https://ir.fy.edu.tw:8080/ir/handle/987654321/15472

    Title: Exhaust constituent emission factors of printed circuit board pyrolysis processes and its exhaust control
    Authors: Chiang, Hung-Lung;Lin, Kuo-Hsiung
    Contributors: 輔英科技大學 環境工程與科學系
    Keywords: Iron impregnated Al(2)O(3);Pyrolysis;Volatile organic compounds;Waste printed circuit board (WPCB)
    Date: 2014-01-15
    Issue Date: 2014-08-08 13:27:56 (UTC+8)
    Abstract: The printed circuit board (PCB) is an important part of electrical and electronic equipment, and its disposal and the recovery of useful materials from waste PCBs (WPCBs) are key issues for waste electrical and electronic equipment. Waste PCB compositions and their pyrolysis characteristics were analyzed in this study. In addition, the volatile organic compound (VOC) exhaust was controlled by an iron-impregnated alumina oxide catalyst. Results indicated that carbon and oxygen were the dominant components (hundreds mg/g) of the raw materials, and other elements such as nitrogen, bromine, and copper were several decades mg/g. Exhaust constituents of CO, H2, CH4, CO2, and NOx, were 60-115, 0.4-4.0, 1.1-10, 30-95, and 0-0.7mg/g, corresponding to temperatures ranging from 200 to 500?C. When the pyrolysis temperature was lower than 300?C, aromatics and paraffins were the major species, contributing 90% of ozone precursor VOCs, and an increase in the pyrolysis temperature corresponded to a decrease in the fraction of aromatic emission factors. Methanol, ethylacetate, acetone, dichloromethane, tetrachloromethane and acrylonitrile were the main species of oxygenated and chlorinated VOCs. The emission factors of some brominated compounds, i.e., bromoform, bromophenol, and dibromophenol, were higher at temperatures over 400?C. When VOC exhaust was flowed through the bed of Fe-impregnated Al2O3, the emission of ozone precursor VOCs could be reduced by 70-80%.
    Relation: Journal of Hazardous Materials 264,545-551
    Appears in Collections:[環境工程與科學系] 期刊論文

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