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首页> 外文期刊>Fuel >Promotional effect of CuO loading on the catalytic activity and SO_2 resistance of MnO_x/TiO_2 catalyst for simultaneous NO reduction and Hg~0 oxidation
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Promotional effect of CuO loading on the catalytic activity and SO_2 resistance of MnO_x/TiO_2 catalyst for simultaneous NO reduction and Hg~0 oxidation

机译：CuO负载量对同时还原NO和Hg〜0氧化的MnO_x / TiO_2催化剂的催化活性和SO_2抗性的促进作用

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摘要

CuO loaded MnOx/TiO2 mixed oxide (CuMnTi) synthesized by an ultrasonic-assisted impregnation method was for the first time employed for simultaneous nitrogen monoxide (NO) reduction and elemental mercury (Hg-0) oxidation under selective catalytic reduction (SCR) atmosphere with the presence of NH3. The CuMnTi catalyst exhibited a wide temperature window from 150 to 250 degrees C for both NO reduction and Hg-0 oxidation. At the optimal temperature of 175 degrees C, CuMnTi reduced 96.4% of the inlet NO and oxidized 100% of the inlet Hg-0 at a very high gas hourly space velocity (GHSV) of 40,000 h(-1). O-2, HCl and NO significantly promoted Hg-0 oxidation and offset the adverse effect of detrimental flue gas components such as water vapor, SO2 and NH3. The protection effect of CuO over MnOx reserved enough active sites of CuMnTi for Hg-0 oxidation in the presence of NH3 or SO2. Compared with MnOx/TiO2 (MnTi), the superior redox property, enlarged Hg-0 adsorption capacity and decent SO2 resistance of CuMnTi ternary system were evidenced to account for its improved catalytic activity. This study indicated future potential for applying CuMnTi catalyst in simultaneous NO reduction and Hg-0 oxidation in low-temperature (150-250 degrees C) and low-rank (sub-bituminous and lignite) coal combustion flue gases.
机译：通过超声辅助浸渍法合成的负载有CuO的MnOx / TiO2混合氧化物（CuMnTi）首次用于在选择性催化还原（SCR）气氛下同时还原一氧化氮（NO）和元素汞（Hg-0）的氧化反应。 NH3的存在。对于NO还原和Hg-0氧化，CuMnTi催化剂在150至250摄氏度的温度范围内均显示出较宽的温度范围。在175摄氏度的最佳温度下，CuMnTi在40,000 h（-1）的极高气体时空速（GHSV）下还原了96.4％的入口NO，并氧化了100％的Hg-0入口。 O-2，HCl和NO显着促进Hg-0氧化，并抵消了有害的烟道气成分（如水蒸气，SO2和NH3）的不利影响。在NH3或SO2存在下，CuO对MnOx的保护作用保留了足够的CuMnTi活性位用于Hg-0氧化。与MnOx / TiO2（MnTi）相比，CuMnTi三元体系具有优异的氧化还原性能，增强的Hg-0吸附能力和良好的SO2耐受性，这证明了其催化活性的提高。这项研究表明了在低温（150-250摄氏度）和低等级（亚烟煤和褐煤）煤燃烧烟气中同时还原NO和Hg-0氧化方面应用CuMnTi催化剂的未来潜力。

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  • 来源
    《Fuel》 |2018年第1期|79-88|共10页
  • 作者

    Yang Zequn; Li Hailong; Liu Xi; Li Pu; Yang Jianping; Lee Po-Heng; Shih Kaimin;

  • 作者单位

    Univ Hong Kong, Dept Civil Engn, Hong Kong, Hong Kong, Peoples R China;

    Univ Hong Kong, Dept Civil Engn, Hong Kong, Hong Kong, Peoples R China;

    Cent S Univ, Sch Energy Sci & Engn, Changsha 410083, Hunan, Peoples R China;

    Univ Hong Kong, Dept Civil Engn, Hong Kong, Hong Kong, Peoples R China;

    Cent S Univ, Sch Energy Sci & Engn, Changsha 410083, Hunan, Peoples R China;

    Hong Kong Polytech Univ, Dept Civil & Environm Engn, Hong Kong, Hong Kong, Peoples R China;

    Univ Hong Kong, Dept Civil Engn, Hong Kong, Hong Kong, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Mercury; CuMnTi ternary mixed oxide; Catalysis; Coal combustion; Flue gas;

    机译：汞;CuMnTi三元混合氧化物;催化;煤燃烧;烟气;

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