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    Please use this identifier to cite or link to this item: http://ir.cnu.edu.tw/handle/310902800/23256

    標題: Production of pyrolytic liquids from industrial sewage sludges in an induction-heating reactor
    作者: Wen-Tien Tsai
    Jeng-Hung Chang
    Kuo-Jung Hsien
    Yuan-Ming Chang
    貢獻者: 環境工程與科學系
    關鍵字: Sewage sludge
    Chemical characterization
    日期: 2009-01
    上傳時間: 2010-11-18 11:46:09 (UTC+8)
    摘要: With the application of induction-heating, the pyrolytic experiments have been carried out for three sewage sludges from the food processing factories in an externally heated fixed-bed reactor. The thermochemical characteristics of sludge samples were first analyzed. The results indicated that the calorific value had about 15 MJ/kg on an average, suggesting that it had a potential for biomass energy source. However, its nitrogen concentration was relatively high. From the thermogravimetric analysis (TGA) curves, it showed that the pyrolysis reaction can be almost finished in the temperature range of 450–750 °C. The yields of resulting liquid and char products from the pyrolysis of sewage sludge were discussed for examining the effects of pyrolysis temperature (500–800 °C), heating rate (200–500 °C/min), and holding time (1–8 min). Overall, the variation of yield was not so significant in the experimental conditions for three sewage sludges. All results of the resulting liquid products analyzed by elemental analyzer, pH meter, Karl-Fischer moisture titrator and bomb calorimeter were in consistence with those analyses by FTIR spectroscopy. Furthermore, the pyrolysis liquid products contained large amounts of water (>73% by weight) mostly derived from the bound water in the biosludge feedstocks and the condensation reactions during the pyrolysis reaction, and fewer contents of oxygenated hydrocarbons composing of carbonyl and nitrogen-containing groups, resulting in low pH and low calorific values.
    Appears in Collections:[環境工程與科學系(所)] 期刊論文

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