Effects of Reaction Conditions on Elemental Mercury Oxidation in Simulated Flue Gas by DC Nonthermal Plasma

Effects of Reaction Conditions on Elemental Mercury Oxidation in Simulated Flue Gas by DC Nonthermal Plasma
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反应条件对直流低温等离子体模拟烟气中元素汞氧化的影响

DOI:
10.1021/ie200130m
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发表时间:
2011-04
期刊:
Industrial & Engineering Chemistry Research
影响因子:
--
通讯作者:
Fan, Weiyi
Fan, Weiyi
中科院分区:
其他
文献类型:
--
作者:
Wang, Meiyan;Zhu, Tianle;Luo, Hongjing;Wang, Hong;Fan, Weiyi

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在直流电源激励下的线-筒等离子体反应器中,研究了放电极性、放电电极结构、O2/CO2比和水蒸气对模拟烟气中单质汞(Hg 0)氧化的影响。Hg 0的氧化效率随着比能量密度(SED)的增加而增加。与直流负高压下的辉光放电相比,直流正高压下的流光电晕放电在相同的SED条件下具有更高的Hg 0氧化效率。放电电极的配置显着影响等离子体反应器中的能量密度,但几乎不影响Hg 0氧化为一个固定的SED。模拟烟气中O2/CO2比值的增加明显促进了Hg 0的氧化。然而,随着H2O的加入,由于O3的形成减少,Hg 0的氧化被显着抑制。
The effects of discharge polarity, discharge electrode configuration, O2/CO2 ratio, and water vapor on the elemental mercury (Hg0) oxidation in simulated flue gas were investigated in a wire-cylinder plasma reactor energized by DC power. The Hg0 oxidation efficiency increases with the increase of specific energy density (SED). Compared with the glow corona discharge energized by negative DC high voltage, the streamer corona discharge induced by positive DC high voltage exhibits a much higher Hg0 oxidation efficiency under identical SED. The discharge electrode configuration significantly influences the energy density in the plasma reactor, but hardly affects Hg0 oxidation for a fixed SED. The increase of O2/CO2 ratio in simulated flue gas obviously enhances Hg0 oxidation. However, with the addition of H2O, Hg0 oxidation is remarkably restrained due to the decrease of O3 formation.
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发表时间: 2008-06
影响因子: 4
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