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首页> 外文期刊>Environmental Science & Technology >Mercury Removal from Flue Gases by Novel Regenerate Magnetic Nanocomposite Sorbents
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Mercury Removal from Flue Gases by Novel Regenerate Magnetic Nanocomposite Sorbents

机译：新型再生磁性纳米复合吸附剂从烟气中去除汞

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摘要

Magnetic zeolite composites with supported silver nanoparticles are a new class of multifunctional materials with potential applications as recyclable catalysts, disinfectants, and sorbents. This study evaluated the suitability of the magnetic composites as sorbents for the removal of elemental mercury vapor from flue gases of coal-fired power plants. The sorbents were found to completely capture mercury at temperatures up to 200 ℃, and the mercury capacity of the sorbents was found to be affected by the state, content and size of the silver particles in the composite. Cumulative or extended thermal treatments at 400 ℃ were found to improve the mercury capture capacity, allowing the sorbentto be regenerated and recycled multiple times without performance degradation. The magnetic sorbent was readily separated from fly ash by magnetic separation, leaving the fly ash essentially free of sorbent contamination. In initial in-plant tests, the sorbents were able to capture mercury from the flue gases of an operational, full-scale, coal-fired power plant The combination of mercury capacity, ease of separation and regeneration, and recyclability makes these multifunctional magnetic composites excellent candidate sorbents forthe control of mercury emissions from coal-fired power plants.
机译：具有负载型银纳米粒子的磁性沸石复合材料是一类新型的多功能材料，具有潜在的应用前景，可作为可循环利用的催化剂，消毒剂和吸附剂。这项研究评估了磁性复合材料作为吸附剂从燃煤电厂烟气中去除元素汞蒸气的适用性。发现吸附剂可以在高达200℃的温度下完全捕获汞，并且吸附剂的汞容量受复合物中银颗粒的状态，含量和尺寸的影响。发现在400℃进行累积或延长的热处理可以提高汞的捕集能力，使吸附剂可以多次再生和循环使用而不会降低性能。磁性吸附剂很容易通过磁分离与粉煤灰分离，使粉煤灰基本上没有吸附剂污染。在最初的工厂内测试中，吸附剂能够从运行中的大型燃煤电厂的烟道气中捕获汞。汞容量，易于分离和再生以及可回收性的结合使这些多功能磁性复合材料成为可能。是控制燃煤电厂汞排放的极好的候选吸附剂。

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  • 来源
    《Environmental Science & Technology》 |2009年第9期|3266-3271|共6页
  • 作者

    JIE DONG; ZHENGHE XU; STEVEN M. KUZNICKI;

  • 作者单位

    Department of Chemical and Materials Engineering, University of Alberta Edmonton, Alberta T6G 2V4, Canada;

    Department of Chemical and Materials Engineering, University of Alberta Edmonton, Alberta T6G 2V4, Canada;

    Department of Chemical and Materials Engineering, University of Alberta Edmonton, Alberta T6G 2V4, Canada;

  • 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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