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首页> 外文期刊>Fuel >Reaction mechanism for the influence of SO2 on Hg-0 adsorption and oxidation with Ce-0.1-Zr-MnO2
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Reaction mechanism for the influence of SO2 on Hg-0 adsorption and oxidation with Ce-0.1-Zr-MnO2

机译：Ce-0.1-Zr-MnO2对SO2影响Hg-0吸附和氧化的反应机理

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摘要

The removal of Hg-0 from flue gas has been one of the primary challenges in the control of mercury emission. The presence of even small amounts of SO2 has a significant influence on the Hg-0 removal process, and the mechanism of this process has not been thoroughly explained to date. To understand the mechanism for SO2 influence, the influence of SO2 on the Hg0 adsorption and Hg-0 oxidation components of the Hg-0 removal process were investigated separately based on Ce-0.1-Zr-MnO2 center dot SO2 was shown to have serious negative effects on the Hg-0 adsorption process due to the reaction between SO2 and Mn-based active sites, as determined by TGA and XPS results. In contrast, for the Hg0 oxidation process Mn-SO42 formed through the reaction between SO2 and Mn-based active sites, and Mn-SO42 had a certain contribution to Hg-0 oxidation. Moreover, XPS results indicated that SO2 reacts with O-2 to form SO3 which adsorbed on the catalyst surface and act as new active sites, promoting Hg-0 oxidation via: Hg + SO3 + 1/2O(2) -> HgSO4. This phenomenon caused the catalyst to retain Hg-0 oxidation activity in the presence of SO2 for a relatively long time. (C) 2017 Elsevier Ltd. All rights reserved.
机译：从烟气中去除Hg-0一直是控制汞排放的主要挑战之一。即使少量的SO2的存在也对Hg-0的去除过程有重大影响，迄今为止，该过程的机理尚未得到充分的解释。为了了解SO2的影响机理，基于Ce-0.1-Zr-MnO2中心点SO2具有严重的负面影响，分别研究了SO2对Hg-0去除过程中Hg0吸附和Hg-0氧化成分的影响。 TGA和XPS结果确定，由于SO2和Mn基活性位之间的反应，Hg-0吸附过程受到Hg-0的影响。相反，对于Hg0氧化过程，通过SO2和Mn基活性位点之间的反应形成的Mn-SO42，而Mn-SO42对Hg-0的氧化有一定的贡献。此外，XPS结果表明SO2与O-2反应形成SO3，该SO3吸附在催化剂表面并充当新的活性位点，通过Hg + SO3 + 1 / 2O（2）-> HgSO4促进Hg-0氧化。这种现象导致催化剂在SO2存在的情况下保持相对较长的Hg-0氧化活性。 （C）2017 Elsevier Ltd.保留所有权利。

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  • 来源
    《Fuel》 |2017年第1期|308-315|共8页
  • 作者

    Zhang Xiaopeng; Li Zhuofeng; Wang Jinxin; Tan Bojian; Cui Yuezong; He Gaohong;

  • 作者单位

    Dalian Univ Technol, Sch Petr & Chem Engn, 2 Dagong Rd, Panjin 124221, Liaoning, Peoples R China;

    Dalian Univ Technol, Sch Petr & Chem Engn, 2 Dagong Rd, Panjin 124221, Liaoning, Peoples R China;

    Dalian Univ Technol, Sch Petr & Chem Engn, 2 Dagong Rd, Panjin 124221, Liaoning, Peoples R China;

    Dalian Univ Technol, Sch Petr & Chem Engn, 2 Dagong Rd, Panjin 124221, Liaoning, Peoples R China;

    Dalian Univ Technol, Sch Petr & Chem Engn, 2 Dagong Rd, Panjin 124221, Liaoning, Peoples R China;

    Dalian Univ Technol, Sch Petr & Chem Engn, 2 Dagong Rd, Panjin 124221, Liaoning, 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

    Element mercury removal; SO2 poisoning; Ce-0.1-Zr-Mn; Adsorption; Oxidation;

    机译：元素除汞;SO2中毒;Ce-0.1-Zr-Mn;吸附;氧化;

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