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A CuO-V_2O_5/TiO_2 CATALYST FOR THE SELECTIVE CATALYTIC REDUCTION OF NO WITH NH_3

机译:一种用于NH_3选择性还原NO的CuP-V_2O_5 / TiO2催化剂

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摘要

A series of CuO-V2O5/TiO2 catalysts with different Cu contents were prepared by wet impregnation method and used in selective catalytic reduction of NO with NH3. The aim of this design was to improve the low-temperature selective catalytic reduction (SCR) performance and broaden the temperature window compared to V2O5/TiO2 and CuO/TiO2. It was found that the NO conversion over Cu-V/Ti was greatly improved with V2O5/TiO2 and CuO/TiO2. The catalysts were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), hydrogen temperature-programmed reduction (H-2-TPR), temperature programmed desorption of ammonia or nitric oxide (NH3-TPD and NO-TPD). The results indicated that copper species had a good interaction with TiO2, vanadium species interacted with TiO2 by copper species, thereby generating more V4+. This had led to the increasing of chemisorb oxygen, better reduction property, more surface acid sites, and improvement of NH3 and NO adsorption capacity, all of these resulting in better NH3-SCR performance of 10Cu-V/Ti catalysts. Furthermore, the catalyst showed a good H2O and SO2 resistance at activation temperature.
机译:采用湿法浸渍法制备了一系列不同Cu含量的CuO-V2O5 / TiO2催化剂,用于NH 3选择性催化还原NO。与V2O5 / TiO2和CuO / TiO2相比,该设计的目的是提高低温选择性催化还原(SCR)性能并拓宽温度范围。发现使用V2O5 / TiO2和CuO / TiO2可以大大提高Cu-V / Ti上的NO转化率。通过X射线衍射(XRD),X射线光电子能谱(XPS),氢气程序升温还原(H-2-TPR),氨或一氧化氮程序升温脱附(NH3-TPD和NO- TPD)。结果表明,铜物种与TiO2有良好的相互作用,钒物种与TiO2的相互作用是由铜物种产生的,从而产生更多的V4 +。这导致化学吸附氧的增加,更好的还原性能,更多的表面酸位以及对NH3和NO吸附能力的改善,所有这些都导致10Cu-V / Ti催化剂具有更好的NH3-SCR性能。此外,该催化剂在活化温度下显示出良好的抗H2O和SO2性能。

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  • 来源
    《Combustion Science and Technology》 |2015年第6期|925-936|共12页
  • 作者单位

    Nanjing Univ Sci & Technol, Sch Chem Engn, Nanjing 210094, Jiangsu, Peoples R China.;

    Nanjing Univ Sci & Technol, Sch Chem Engn, Nanjing 210094, Jiangsu, Peoples R China.;

    Nanjing Univ Sci & Technol, Sch Chem Engn, Nanjing 210094, Jiangsu, Peoples R China.;

    Nanjing Univ Sci & Technol, Sch Chem Engn, Nanjing 210094, Jiangsu, Peoples R China.;

    Nanjing Univ Sci & Technol, Sch Chem Engn, Nanjing 210094, Jiangsu, Peoples R China.;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Anatase TiO2; CuO; NH3; Selective catalytic reduction; V2O5;

    机译:锐钛矿型TiO2;氧化铜NH3;选择性催化还原;V2O5;
  • 入库时间 2022-08-18 00:11:53

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