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钕的添加对V2O5-MoO3/TiO2平板式脱硝催化剂性能的影响
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作者单位:

1.大唐南京环保科技有限责任公司;2.南京理工大学

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中图分类号:

X511

基金项目:

江苏省科技成果转化专项资金项目; 江苏省博士后科研资助计划; 中国博士后科学基金


Effect of Neodymium Addition on the Plate-type V2O5-MoO3/TiO2 Catalyst for Selective Catalytic Reduction of NO
Author:
Affiliation:

1.Datang Nanjing Environmental Protection Technology Co,Ltd;2.School of Chemical Engineering,Nanjing University of Science and Technology

Fund Project:

The Fund Project for Transformation of Scientific and Technological Achievements of Jiangsu Province of China; China Postdoctoral Science Foundation Grant; Postdoctoral Grant Grog-ram of Jiangsu

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    摘要:

    本文制备了一系列不同Nd含量的V2O5-MoO3-Nd2O3/TiO2平板式脱硝催化剂。采用XRD、N2-吸附脱附、XPS、H2-TPR、拉曼光谱和NH3-TPD等表征手段对催化剂进行分析。结果表明:适量Nd(0.25%、0.5%)的引入,增强了V2O5-MoO3/TiO2催化剂的还原性能,增加了催化剂的Oα/(Oα+Oβ)比率,从而提升了催化剂的脱硝活性。然而,过量Nd(0.75%、1%)的添加,会导致催化剂酸性性能的显著降低,造成催化剂脱硝性能的下降。此外,过量Nd的添加还会对催化剂的耐磨强度有负面影响。各催化剂中,VMoNd(0.5%)/Ti催化剂显示了最佳的脱硝活性。

    Abstract:

    A series of plate-type V2O5-MoO3-Nd2O3/TiO2 catalysts with different amounts of neodymium were prepared to investigate the impact of neodymium addition on selective catalytic reduction (SCR) of NO with NH3. XRD, N2-adsorption, XPS, H2-TPR, Raman and NH3-TPD were carried out to characterize the catalysts. It was found that with the suitable addition of Nd (0.25% and 0.5%) to V2O5-MoO3/TiO2 catalyst not only brought to the improvement of the reduction property, but also increased the Oα/(Oα+Oβ) ratio of the catalyst, which leaded to the enhanced catalytic efficiency. However, when the content of Nd was excessive (0.75% and 1%), the acid sites of the catalysts decreased evidently. Accordingly, the catalytic performance of these catalysts was relatively low. What is more, the mechanical property of the catalyst declined when the content of Nd was excessive. Among the catalysts investigated, VMoNd(0.5%)/Ti catalyst had the best catalytic performance.

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黄力,纵宇浩,王虎,常峥峰,张舒乐,钟秦.钕的添加对V2O5-MoO3/TiO2平板式脱硝催化剂性能的影响[J].稀有金属材料与工程,2021,50(2):475~482.[Huang Li, Zong Yuhao, Wang Hu, Chang Zhengfeng, Zhang Shule, Zhong Qin. Effect of Neodymium Addition on the Plate-type V2O5-MoO3/TiO2 Catalyst for Selective Catalytic Reduction of NO[J]. Rare Metal Materials and Engineering,2021,50(2):475~482.]
DOI:10.12442/j. issn.1002-185X.20200057

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  • 收稿日期:2020-01-26
  • 最后修改日期:2020-04-20
  • 录用日期:2020-04-26
  • 在线发布日期: 2021-03-09
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