Preparation of V2O5/TiO2 catalyst with in-situ sol-gel method for denitration in wide temperature window

GUO Feng; YU Jian; CHU Mo; XU Guangwen

doi:10.3969/j.issn.0438-1157.2014.06.021

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Preparation of V₂O₅/TiO₂ catalyst with in-situ sol-gel method for denitration in wide temperature window

更新时间：2025-12-10

- Preparation of V₂O₅/TiO₂ catalyst with in-situ sol-gel method for denitration in wide temperature window
- CIESC Journal Issue 6, Pages: 2098-2105(2014)
- 作者机构：
  
  1. 中国矿业大学(北京)化学与环境工程学院,北京,100083
  2. 中国科学院过程工程研究所多相复杂系统国家重点实验室,北京,100190
- 作者简介：
- 基金信息：
- DOI：10.3969/j.issn.0438-1157.2014.06.021
  CLC： Q426.6
- Online First：05 June 2014，
  
  Published：05 June 2014
- 稿件说明：
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GUO Feng, YU Jian, CHU Mo, et al. Preparation of V₂O₅/TiO₂ catalyst with in-situ sol-gel method for denitration in wide temperature window[J]. CIESC Journal, 2014, (6): 2098-2105. DOI: 10.3969/j.issn.0438-1157.2014.06.021.
DOI：

GUO Feng, YU Jian, CHU Mo, et al. Preparation of V₂O₅/TiO₂ catalyst with in-situ sol-gel method for denitration in wide temperature window[J]. CIESC Journal, 2014, (6): 2098-2105. DOI: 10.3969/j.issn.0438-1157.2014.06.021. DOI：

摘要

利用溶胶-凝胶技术原位合成一系列不同V2O5担载量的V2O5/TiO2催化剂，通过BET、XRD、NH3-TPD及紫外-可见光等手段对催化剂进行表征。结果表明：制备的催化剂均具有介孔结构，V2O5在TiO2表面高度分散，且存在3种典型的酸性位。通过选择性催化还原反应对V2O5/TiO2催化剂进行活性评价，结果显示随着V2O5含量的增加，NO转化率大于75%的温度窗口向低温方向偏移，含10% （质量分数）V2O5的催化剂的NO转化率为80%的温度窗口最宽为200～450℃，240℃时20 h连续实验表现出稳定的抗硫抗水性能。结合紫外-可见光谱分析，揭示了钒掺杂所形成的单聚和低聚钒酸盐为催化剂的活性组分。

Abstract

A series of V2O5/TiO2 catalysts with different amounts of V2O5 were prepared with the in-situ sol-gel method. Characterization of the catalysts were performed with N2 adsorption and desorption

X-ray diffraction (XRD)

UV-Vis spectroscopy (UV-Vis) and temperature programmed desorption of NH3(NH3-TPD). All catalysts exhibited mesoporous structure

high dispersion of V2O5 on the surface of TiO2 and three typical acid sites. Evaluation of the catalytic performance for NH3-denitration revealed good activity for low-temperature denitration of the catalyst

which increased with increasing amount of V2O5. The V2O5/TiO2 catalyst with 10% (mass) V2O5 showed the widest temperature window of 200-450℃ for NO conversions of about 80% at a NH3/NO ratio of 0.8. The catalytic performance for denitration did not obviously decrease in a 20 h continuous denitration test at 240℃ for the simulated flue gas containing 0.06% (vol) SO2 and 10% (vol) H2O. The UV-Vis analysis clarified that for NH3-denitration the unimer and low-poly vanadates are the active components of the prepared V2O5/TiO2 catalysts.

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