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    Please use this identifier to cite or link to this item: http://ir.cnu.edu.tw/handle/310902800/21676


    標題: Treating phenolic solution using CeO2 catalyst prepared via redox reaction in hydrogen peroxide
    作者: I-Pin Chen
    Ching-Huei Wang
    Shiow-Shyung Lin
    Shih-Hsiung Chang
    貢獻者: 環境工程與科學系
    關鍵字: CeO2 catalyst
    preparing method
    CWAO of phenol
    O2-temperature programming desorption (O2-TPD)
    H2-temperature programming reduction (H2-TPR)
    regeneration
    日期: 2008-03
    上傳時間: 2009-10-05 14:12:52 (UTC+8)
    摘要: Of five ceria catalysts prepared for the catalytic wet air oxidation (CWAO) of phenol, the most active was one prepared via a redox reaction in hydrogen peroxide, designated CeO2-A, and the second most active was one prepared via direct calcination of CeCl3·7H2O. The former has 100% phenol (1000 ppm) conversion and 95% COD removal after 2 h at 160 °C. The superior activity of this catalyst was verified by O2-temperature programming desorption, which showed that CeO2-A had the most exchangeable structure O2 (capping O2), and by H2-temperature programming reduction,
    which showed that it had the highest H2 consumption (the most H2-reducible Ce species in the catalyst). X-ray diffraction analysis also revealed that CeO2-A had the most structure defects, corresponding to the most exchangeable structure O2 and the highest activity. An induction period, typical of reactions involving free radicals, was observed with all catalysts and this period decreased with more active catalysts and higher reaction temperatures. Used CeO2-A was effectively
    regenerated via acetone rinsing without further calcination. The CeO2-A catalyst retained approximately the same activity even after three regenerations, showing that it has good durability.
    Appears in Collections:[環境工程與科學系(所)] 期刊論文

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