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    Please use this identifier to cite or link to this item: http://ir.cnu.edu.tw/handle/310902800/30963

    標題: Influence of Pd-Cu on nanoscale zero-valent iron supported for selective reduction of nitrate
    作者: Lubphoo, Yingyote
    Chyan, Jih-Ming
    Grisdanurak, Nurak
    Liao, Chih-Hsiang
    貢獻者: Thammasat Univ, Dept Chem Engn
    Chia Nan Univ Pharm & Sci, Dept Environm Resources Management
    Thammasat Univ, Ctr Excellence Environm Catalysis & Adsorpt
    關鍵字: Catalytic nitrate reduction
    Nano scale zero valent iron (nFe(0))
    Nitrogen gas selectivity
    日期: 2016-02
    上傳時間: 2018-01-18 11:38:49 (UTC+8)
    出版者: Elsevier Science Bv
    摘要: Selective reduction of nitrate over nanoscale zero-valent iron (nFe(0)) modified metals (Pd and Cu) was investigated. Parameters of modified metal loading, metallic ratio (Pd:Cu), and H-2 gas supplying were investigated on the influence of nitrate reduction. Metal (Cu, Pd) deposited onto nanoiron was proven to be effective in promoting the formation of nitrogen gas and, on the other hand, suppressing the NH4+ formation. Hydrogen gas feeding appeared to have a synergistic effect on nitrate removal and on nitrogen gas selectivity in all types of catalytic reductants. A catalyst with a loading of 10% of (Pd-Cu)-nFe(0) with a ratio of Pd:Cu of 2:1, and H-2 feeding showed the highest selective to N-2: NH4+ formation (51:42), compared to the others ((Cu-Pd)-nFe(0), Cu-nFe(0), Pd-nFe(0) and nFe(0)). The significant improvement in initiating the formation of N-2, on the other hand suppressing the formation of NH4+, was referred to an indirect electron-transferring process of nFe(0) to Cu and to Pd, consequently. In addition, kinetic evaluations on each catalyst was evaluated and used to postulate the selective reduction of nitrate phenomena. (C) 2015 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
    關聯: Journal of the Taiwan Institute of Chemical Engineers, v.59, pp.285-294
    Appears in Collections:[環境資源管理系(所)] 期刊論文

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