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商业钒钛基选择性催化还原法脱硝催化剂的抗毒改性

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程华, 韦正乐, 杨超, 黄碧纯. 商业钒钛基选择性催化还原法脱硝催化剂的抗毒改性[J]. 环境化学, 2014, 33(6): 1010-1017. doi: 10.7524/j.issn.0254-6108.2014.06.013
引用本文: 程华, 韦正乐, 杨超, 黄碧纯. 商业钒钛基选择性催化还原法脱硝催化剂的抗毒改性[J]. 环境化学, 2014, 33(6): 1010-1017. doi: 10.7524/j.issn.0254-6108.2014.06.013
shu
CHENG Hua, WEI Zhengle, YANG Chao, HUANG Bichun. Improvement on the for the poisoning resistance of commercial de-NOx SCR catalyst[J]. Environmental Chemistry, 2014, 33(6): 1010-1017. doi: 10.7524/j.issn.0254-6108.2014.06.013
Citation: CHENG Hua, WEI Zhengle, YANG Chao, HUANG Bichun. Improvement on the for the poisoning resistance of commercial de-NOx SCR catalyst[J]. Environmental Chemistry, 2014, 33(6): 1010-1017. doi: 10.7524/j.issn.0254-6108.2014.06.013
shu

商业钒钛基选择性催化还原法脱硝催化剂的抗毒改性

  • 1.

    华南理工大学环境与能源学院, 广州, 510006;

  • 2.

    北京百灵天地环保科技有限公司, 广州, 510627;

  • 3.

    广东电网公司电力科学研究院, 广州, 510080;

  • 4.

    广东省大气环境与污染控制重点实验室, 广州, 510006

Improvement on the for the poisoning resistance of commercial de-NOx SCR catalyst

  • 1.

    College of Environment and Energy, South China University of Technology, Guangzhou, 510006, China;

  • 2.

    Beijing Larkworld Environment Technology CO., LTD, Guangzhou, 510627, China;

  • 3.

    China Southern Power Grid CO., LTD, Guangzhou, 510080, China;

  • 4.

    Guangdong Provincial Key Laboratory of Atmospheric Environment and Pollution Control, Guangzhou, 510006, China

  • 摘要: 通过浸渍法向商业V2O5（WO3）/TiO2催化剂中掺杂了不同浓度的Ni或Zr元素，并对催化剂进行了K中毒前后的活性测试以及EDS、BET、XRD、FT-IR、H2-TPR、XPS表征测试.结果表明，掺杂Ni或Zr后催化剂抗K中毒能力显著增强，EDS和XRD结果显示Ni和Zr能进入催化剂体系，催化剂载体TiO2保持原有锐钛矿晶型，其他元素则以高度分散或无定形状态存在.NH3吸附FT-IR实验证明掺杂Ni后催化剂表面形成了新的Lewis酸位，而Zr的加入使原有Bronsted酸位得以增强，这是两种元素的掺杂均能提高催化剂抗K中毒能力的原因.H2-TPR和XPS实验证实掺杂后催化剂氧化还原能力得到了增强，弥补了比表面积减少的不利因素.
    Abstract: To improve the resistance towards alkali metal poisoning, Ni or Zr with different concentrations was introduced to commercial SCR catalysts by a wet impregnation. The catalysts before and after modifications were characterized by energy dispersive spectrometry(EDS), N2 adsorption-desorption,X-ray powder diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR),temperature-programmed reduction(TPR) and X-ray photoelectron spectroscopy (XPS). Results show that the modifications of the catalysts significantly improved their resistance towards K poisoning. Ni and Zr were doped sucessfully into the commercial catalysts, and the crystalline structure of the catalysts was maintained. FTIR results showed that the catalysts doped with Ni formed new Lewis acid sites. Brnsted acid sites were strengthened by loading Zr.The increased acid sites might be the reason why the catalysts after modification showed higher resistance to K poisoning. H2-TPR and XPS results showed enhanced Redox properties of the catalysts after doping which balanced the negative effect of the reduced specific surface area.
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  • 收稿日期:  2013-10-02
程华, 韦正乐, 杨超, 黄碧纯. 商业钒钛基选择性催化还原法脱硝催化剂的抗毒改性[J]. 环境化学, 2014, 33(6): 1010-1017. doi: 10.7524/j.issn.0254-6108.2014.06.013
引用本文: 程华, 韦正乐, 杨超, 黄碧纯. 商业钒钛基选择性催化还原法脱硝催化剂的抗毒改性[J]. 环境化学, 2014, 33(6): 1010-1017. doi: 10.7524/j.issn.0254-6108.2014.06.013
shu
CHENG Hua, WEI Zhengle, YANG Chao, HUANG Bichun. Improvement on the for the poisoning resistance of commercial de-NOx SCR catalyst[J]. Environmental Chemistry, 2014, 33(6): 1010-1017. doi: 10.7524/j.issn.0254-6108.2014.06.013
Citation: CHENG Hua, WEI Zhengle, YANG Chao, HUANG Bichun. Improvement on the for the poisoning resistance of commercial de-NOx SCR catalyst[J]. Environmental Chemistry, 2014, 33(6): 1010-1017. doi: 10.7524/j.issn.0254-6108.2014.06.013
shu

商业钒钛基选择性催化还原法脱硝催化剂的抗毒改性

  • 1.  华南理工大学环境与能源学院, 广州, 510006;
  • 2.  北京百灵天地环保科技有限公司, 广州, 510627;
  • 3.  广东电网公司电力科学研究院, 广州, 510080;
  • 4.  广东省大气环境与污染控制重点实验室, 广州, 510006
  • 收稿日期:  2013-10-02

摘要: 通过浸渍法向商业V2O5（WO3）/TiO2催化剂中掺杂了不同浓度的Ni或Zr元素，并对催化剂进行了K中毒前后的活性测试以及EDS、BET、XRD、FT-IR、H2-TPR、XPS表征测试.结果表明，掺杂Ni或Zr后催化剂抗K中毒能力显著增强，EDS和XRD结果显示Ni和Zr能进入催化剂体系，催化剂载体TiO2保持原有锐钛矿晶型，其他元素则以高度分散或无定形状态存在.NH3吸附FT-IR实验证明掺杂Ni后催化剂表面形成了新的Lewis酸位，而Zr的加入使原有Bronsted酸位得以增强，这是两种元素的掺杂均能提高催化剂抗K中毒能力的原因.H2-TPR和XPS实验证实掺杂后催化剂氧化还原能力得到了增强，弥补了比表面积减少的不利因素.

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