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燃煤烟气中砷对V2O5-WO3/TiO2SCR脱硝催化剂性能的影响

丁健 刘清才 孔明 林凡 杨剑 任山

丁健, 刘清才, 孔明, 林凡, 杨剑, 任山. 燃煤烟气中砷对V2O5-WO3/TiO2SCR脱硝催化剂性能的影响[J]. 燃料化学学报, 2016, 44(4): 495-499.
引用本文: 丁健, 刘清才, 孔明, 林凡, 杨剑, 任山. 燃煤烟气中砷对V2O5-WO3/TiO2SCR脱硝催化剂性能的影响[J]. 燃料化学学报, 2016, 44(4): 495-499.
DING Jian, LIU Qing-cai, KONG Ming, LIN Fan, YANG Jian, REN Shan. Influence of arsenic in flue gas on the performance of V2O5-WO3/TiO2 catalyst in selective catalytic reduction of NOx[J]. Journal of Fuel Chemistry and Technology, 2016, 44(4): 495-499.
Citation: DING Jian, LIU Qing-cai, KONG Ming, LIN Fan, YANG Jian, REN Shan. Influence of arsenic in flue gas on the performance of V2O5-WO3/TiO2 catalyst in selective catalytic reduction of NOx[J]. Journal of Fuel Chemistry and Technology, 2016, 44(4): 495-499.

燃煤烟气中砷对V2O5-WO3/TiO2SCR脱硝催化剂性能的影响

基金项目: 

国家自然科学基金 51274263

国家自然科学基金 51204220

重庆市自然科学基金 cstc2013jjB0035

详细信息
  • 中图分类号: X703.5

Influence of arsenic in flue gas on the performance of V2O5-WO3/TiO2 catalyst in selective catalytic reduction of NOx

More Information
  • 摘要: 通过将商业V2O5-WO3/TiO2脱硝催化剂暴露于含As2O3烟气中,制备了砷中毒催化剂,并运用X射线衍射(XRD)、比表面积(BET)、NH3化学吸附、傅里叶变换红外光谱(FT-IR)、X射线光电子能谱等技术表征分析了砷对催化剂性能的影响,并提出了催化剂砷中毒机理。结果表明,砷对催化剂具有严重的毒害作用,As2O3会吸附在催化剂表面,并被催化剂氧化形成As2O5覆盖层,减小催化剂比表面积,减少催化剂V活性位,阻止催化剂对NH3的吸附,造成催化剂失活。
  • 图  1  实验装置示意图

    Figure  1  Schematic diagram of the experimental system

    图  2  不同温度下砷对催化剂脱硝效率的影响

    Figure  2  Effect of arsenic on the activity of V2O5-WO3/TiO2 catalyst under different temperatures

    图  3  砷中毒前后催化剂的XRD谱图

    Figure  3  XRD patterns of the V2O5-WO3/TiO2 catalysts before and after arsenic poisoning for 1000 and 3000h

    图  4  砷中毒前后催化剂的孔径分布

    Figure  4  Pore size distribution of the V2O5-WO3/TiO2 catalysts before and after arsenic poisoning for 1000 and 3000h

    图  5  砷中毒前后催化剂的NH3化学吸附谱图

    Figure  5  NH3 chemisorption profiles of the V2O5-WO3/TiO2 catalysts before and after arsenic poisoning for 1000 and 3000h

    图  6  砷中毒前后催化剂的傅里叶变换红外光谱谱图

    Figure  6  FT-IR profiles of the V2O5-WO3/TiO2 catalysts before and after arsenic poisoning for 1000 and 3000h

    图  7  砷中毒前后催化剂X射线光电子能谱谱图

    Figure  7  XPS survey spectra of the V2O5-WO3/TiO2 catalysts before and after arsenic poisoning for 1000 and 3000h

    图  8  催化剂中As 3d的X射线光电子能谱图

    Figure  8  As 3d XPS spectra of the V2O5-WO3/TiO2 catalysts after arsenic poisoning for 1000 and 3000h

    图  9  催化剂中V 2p 的X射线光电子能谱谱图

    Figure  9  V 2p XPS spectra of the V2O5-WO3/TiO2 catalysts before and after arsenic poisoning for 1000 and 3000h

    图  10  SCR催化剂砷中毒机理

    Figure  10  Proposed arsenic poisoning mechanism of the V2O5-WO3/TiO2 catalyst for SCR

    表  1  砷中毒前后催化剂比表面积、总孔容、平均孔径

    Table  1  Textural properties of the V2O5-WO3/TiO2 catalysts before and after arsenic poisoning

    SampleBET surface area A/(m2·g-1)Total pore volume v/(cm3·g-1)Average pore diameter d/nm
    fresh53.30.21816.36
    As 1000h46.90.22519.19
    As 3000h48.10.20416.97
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出版历程
  • 收稿日期:  2015-11-26
  • 修回日期:  2016-01-05
  • 网络出版日期:  2021-01-23
  • 刊出日期:  2016-04-30

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