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Improvement of Sol-gel Method and Influence of Calcination Conditions on Properties of MnOx-CeOx/WO3/TiO2-ZrO2 Catalyst

Received: 16 November 2017     Published: 21 November 2017
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Abstract

Modified sol-gel method was adopted to prepare TiO2-ZrO2 carrier of molar ratio 4:1, and the catalysts were prepared by impregnating with WO3 and MnOx-CeOx sequentially. The carriers and catalysts were characterized by X ray diffraction (XRD) and electron scanning electron microscopy (SEM), and their NH3-SCR denitrification activity and sulfur resistance were investigated at low temperature. The results shown that mixing zirconium oxychloride with butyl titanate ethanol solution first and then titrating acetic acid inhibitor would have more Zr4+ substituted Ti4+ doping into the TiO2 lattice, resulting in more lattice defects and active sites. The surface morphology of carriers were all nano particles, but the carrier prepared by modified method shown smaller particle size and better dispersion. The catalyst which was calcined at 200°C for 2.5h exhibited best NH3-SCR performance, its denitrification activity reached 98% at 100°C, and the NOx conversion could be maintained at about 75% after continuously injecting SO2 (100ppm) for 8h.

Published in Science Discovery (Volume 5, Issue 6)
DOI 10.11648/j.sd.20170506.22
Page(s) 463-468
Creative Commons

This is an Open Access article, distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution and reproduction in any medium or format, provided the original work is properly cited.

Copyright

Copyright © The Author(s), 2017. Published by Science Publishing Group

Keywords

Sol-Gel, Selective Catalytic Reduction, TiO2, ZrO2

References
[1] Granger P, Parvulescu V I. Catalytic NOx Abatement Systems for Mobile Sources: From Three-Way to Lean Burn after-Treatment Technologies [J]. Chemical Reviews, 2011, 111(5):3155.
[2] Dong W K, Nam K B, Hong S C. Influence of tungsten on the activity of a Mn/Ce/W/Ti catalyst for the selective catalytic reduction of NO with NH3, at low temperatures [J]. Applied Catalysis A General, 2015, 497:160-166.
[3] Park E, Chin S, Kim J, et al. Preparation of MnOx /TiO2 ultrafine nanocomposite with large surface area and its enhanced toluene oxidation at low temperature. Powder Technol, 2011, 208(3): 740.
[4] 卢熙宁,宋存义,童震松,等.锆掺杂TiO2负载锰铈氧化物低温催化还原NOx[J].北京科技大学学报,2014(9):1222-1232。
[5] Li J, Chang H, Ma L, et al. Low-temperature selective catalytic reduction of NOx, with NH3, over metal oxide and zeolite catalysts—A review [J]. Catalysis Today, 2011, 175(1):147-156.
[6] Chen J P, Yang R T. Selective catalytic reduction of NO with NH3 on SO42-/TiO2 superacid catalyst [J]. Journal of Catalysis, 1993, 139(1):277-288.
[7] 韩承辉,刘炳华,张惠良,等.TiO2-ZrO2的表征及其异丙醇催化转化性能[J].物理化学学报,2006,22(8):993-998。
[8] Kazuhiro Ito, Shuichi Kakino, Keita Ikeue, et al. NO adsorption/desorption property of TiO2–ZrO2, having tolerance to SO2, poisoning [J]. Applied Catalysis B Environmental, 2007, 74(1–2):137-143.
[9] 王龙飞,张亚平,郭婉秋,等.WO3/TiO2-ZrO2脱硝催化剂制备及其NH3活化机理[J].化工学报,2015, 66(10):3903-3910.
[10] 张亚平,汪小蕾,孙克勤,等.WO3对MnOx/TiO2低温脱硝SCR催化剂的改性研究[J].燃料化学学报,2011,39(10):782-786。
[11] 贠丽,汪莉,李强,等.Ce-MnOx/TiO2-ZrO2低温选择催化还原NO活性和抗毒性研究[J].功能材料,2016, 47(10):10059-10064。
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  • APA Style

    Huixian Pan, Li Wang, Shuanling He, Jie Wang. (2017). Improvement of Sol-gel Method and Influence of Calcination Conditions on Properties of MnOx-CeOx/WO3/TiO2-ZrO2 Catalyst. Science Discovery, 5(6), 463-468. https://doi.org/10.11648/j.sd.20170506.22

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    ACS Style

    Huixian Pan; Li Wang; Shuanling He; Jie Wang. Improvement of Sol-gel Method and Influence of Calcination Conditions on Properties of MnOx-CeOx/WO3/TiO2-ZrO2 Catalyst. Sci. Discov. 2017, 5(6), 463-468. doi: 10.11648/j.sd.20170506.22

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    AMA Style

    Huixian Pan, Li Wang, Shuanling He, Jie Wang. Improvement of Sol-gel Method and Influence of Calcination Conditions on Properties of MnOx-CeOx/WO3/TiO2-ZrO2 Catalyst. Sci Discov. 2017;5(6):463-468. doi: 10.11648/j.sd.20170506.22

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  • @article{10.11648/j.sd.20170506.22,
      author = {Huixian Pan and Li Wang and Shuanling He and Jie Wang},
      title = {Improvement of Sol-gel Method and Influence of Calcination Conditions on Properties of MnOx-CeOx/WO3/TiO2-ZrO2 Catalyst},
      journal = {Science Discovery},
      volume = {5},
      number = {6},
      pages = {463-468},
      doi = {10.11648/j.sd.20170506.22},
      url = {https://doi.org/10.11648/j.sd.20170506.22},
      eprint = {https://article.sciencepublishinggroup.com/pdf/10.11648.j.sd.20170506.22},
      abstract = {Modified sol-gel method was adopted to prepare TiO2-ZrO2 carrier of molar ratio 4:1, and the catalysts were prepared by impregnating with WO3 and MnOx-CeOx sequentially. The carriers and catalysts were characterized by X ray diffraction (XRD) and electron scanning electron microscopy (SEM), and their NH3-SCR denitrification activity and sulfur resistance were investigated at low temperature. The results shown that mixing zirconium oxychloride with butyl titanate ethanol solution first and then titrating acetic acid inhibitor would have more Zr4+ substituted Ti4+ doping into the TiO2 lattice, resulting in more lattice defects and active sites. The surface morphology of carriers were all nano particles, but the carrier prepared by modified method shown smaller particle size and better dispersion. The catalyst which was calcined at 200°C for 2.5h exhibited best NH3-SCR performance, its denitrification activity reached 98% at 100°C, and the NOx conversion could be maintained at about 75% after continuously injecting SO2 (100ppm) for 8h.},
     year = {2017}
    }
    

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  • TY  - JOUR
    T1  - Improvement of Sol-gel Method and Influence of Calcination Conditions on Properties of MnOx-CeOx/WO3/TiO2-ZrO2 Catalyst
    AU  - Huixian Pan
    AU  - Li Wang
    AU  - Shuanling He
    AU  - Jie Wang
    Y1  - 2017/11/21
    PY  - 2017
    N1  - https://doi.org/10.11648/j.sd.20170506.22
    DO  - 10.11648/j.sd.20170506.22
    T2  - Science Discovery
    JF  - Science Discovery
    JO  - Science Discovery
    SP  - 463
    EP  - 468
    PB  - Science Publishing Group
    SN  - 2331-0650
    UR  - https://doi.org/10.11648/j.sd.20170506.22
    AB  - Modified sol-gel method was adopted to prepare TiO2-ZrO2 carrier of molar ratio 4:1, and the catalysts were prepared by impregnating with WO3 and MnOx-CeOx sequentially. The carriers and catalysts were characterized by X ray diffraction (XRD) and electron scanning electron microscopy (SEM), and their NH3-SCR denitrification activity and sulfur resistance were investigated at low temperature. The results shown that mixing zirconium oxychloride with butyl titanate ethanol solution first and then titrating acetic acid inhibitor would have more Zr4+ substituted Ti4+ doping into the TiO2 lattice, resulting in more lattice defects and active sites. The surface morphology of carriers were all nano particles, but the carrier prepared by modified method shown smaller particle size and better dispersion. The catalyst which was calcined at 200°C for 2.5h exhibited best NH3-SCR performance, its denitrification activity reached 98% at 100°C, and the NOx conversion could be maintained at about 75% after continuously injecting SO2 (100ppm) for 8h.
    VL  - 5
    IS  - 6
    ER  - 

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Author Information
  • Energy and Environmental Engineering School, University of Science and Technology Beijing, Beijing, China

  • Energy and Environmental Engineering School, University of Science and Technology Beijing, Beijing, China

  • Energy and Environmental Engineering School, University of Science and Technology Beijing, Beijing, China

  • Energy and Environmental Engineering School, University of Science and Technology Beijing, Beijing, China

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