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首页> 外文期刊>Environmental Science & Technology >Mercury Adsorption and Oxidation over Cobalt Oxide Loaded Magnetospheres Catalyst from Fly Ash in Oxyfuel Combustion Flue Gas
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Mercury Adsorption and Oxidation over Cobalt Oxide Loaded Magnetospheres Catalyst from Fly Ash in Oxyfuel Combustion Flue Gas

机译：含氧燃料燃烧烟气中粉煤灰负载的氧化钴负载的磁层催化剂上的汞吸附和氧化

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摘要

Cobalt oxide loaded magnetospheres catalyst from fly ash (Co-MF catalyst) showed good mercury removal capacity and recyclability under air combustion flue gas in our previous study. In this work, the Hg~0 removal behaviors as well as the involved reactions mechanism were investigated in oxyfuel combustion conditions. Further, the recyclability of Co-MF catalyst in oxyfuel combustion atmosphere was also evaluated. The results showed that the Hg~0 removal efficiency in oxyfuel combustion conditions was relative high compared to that in air combustion conditions. The presence of enriched CO_2 (70%) in oxyfuel combustion atmosphere assisted the mercury oxidation due to the oxidation of function group of C-O formed from CO_2. Under both atmospheres, the mercury removal efficiency decreased with the addition of SO_2, NO, and H_2O. However, the enriched CO_2 in oxyfuel combustion atmosphere could somewhat weaken the inhibition of SO_2, NO, and H_2O. The multiple capture-regeneration cycles demonstrated that the Co- MF catalyst also present good regeneration performance in oxyfuel combustion atmosphere.
机译：在我们先前的研究中，粉煤灰负载的氧化钴磁层催化剂（Co-MF催化剂）在空气燃烧烟气中显示出良好的除汞能力和可回收性。在这项工作中，研究了在富氧燃烧条件下Hg〜0的去除行为以及所涉及的反应机理。此外，还评价了Co-MF催化剂在氧燃料燃烧气氛中的可循环性。结果表明，与空气燃烧相比，富氧燃烧条件下Hg〜0的去除效率较高。由于由CO_2形成的C-O的官能团被氧化，富氧CO_2（70％）在富氧燃烧气氛中的存在有助于汞的氧化。在两种气氛下，除汞效率均随SO_2，NO和H_2O的添加而降低。然而，富氧燃烧气氛中富集的CO_2可能在某种程度上削弱了对SO_2，NO和H_2O的抑制作用。多次捕获-再生循环表明，Co-MF催化剂在富氧燃烧气氛中也具有良好的再生性能。

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  • 来源
    《Environmental Science & Technology》 |2015年第13期|8210-8218|共9页
  • 作者

    Jianping Yang; Yongchun Zhao; Lin Chang; Junying Zhang; Chuguang Zheng;

  • 作者单位

    State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China;

    State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China;

    State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China;

    State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China;

    State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
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  • 正文语种 eng
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