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Ni含量对NiO/CeO2催化剂催化CO氧化性能的影响

金石山 张大山 冯旭浩 张财顺 庆绍军 张磊 高志贤

金石山, 张大山, 冯旭浩, 张财顺, 庆绍军, 张磊, 高志贤. Ni含量对NiO/CeO2催化剂催化CO氧化性能的影响[J]. 燃料化学学报. doi: 10.19906/j.cnki.JFCT.2022019
引用本文: 金石山, 张大山, 冯旭浩, 张财顺, 庆绍军, 张磊, 高志贤. Ni含量对NiO/CeO2催化剂催化CO氧化性能的影响[J]. 燃料化学学报. doi: 10.19906/j.cnki.JFCT.2022019
JIN Shi-shan, ZHANG Da-shan, FENG Xu-hao, ZHANG Cai-shun, QING Shao-jun, ZHANG Lei, GAO Zhi-xian. Effect of Ni content on catalytic oxidation of CO over NiO/CeO2 catalyst[J]. Journal of Fuel Chemistry and Technology. doi: 10.19906/j.cnki.JFCT.2022019
Citation: JIN Shi-shan, ZHANG Da-shan, FENG Xu-hao, ZHANG Cai-shun, QING Shao-jun, ZHANG Lei, GAO Zhi-xian. Effect of Ni content on catalytic oxidation of CO over NiO/CeO2 catalyst[J]. Journal of Fuel Chemistry and Technology. doi: 10.19906/j.cnki.JFCT.2022019

Ni含量对NiO/CeO2催化剂催化CO氧化性能的影响

doi: 10.19906/j.cnki.JFCT.2022019
基金项目: 国家自然科学基金(21673270)和辽宁省教育厅科学研究经费项目(L2019012)资助
详细信息
    通讯作者:

    E-mail: lnpuzhanglei@163.com

    gaozx@lnpu.edu.cn

  • 中图分类号: O643

Effect of Ni content on catalytic oxidation of CO over NiO/CeO2 catalyst

Funds: The project was supported by the National Natural Science Foundation of China (21673270) and the Scientific Research Funds project of Education Department of Liaoning Province (L2019012)
  • 摘要: 以CeO2为载体,Ni为活性组分,采用球磨法制备了低温条件下性能较好的CO氧化NiO/CeO2催化剂。通过XRD、BET、H2-TPR、XRF和XPS等技术对催化剂进行了表征,考察了镍含量对催化剂结构和CO低温氧化性能的影响。结果表明,不同Ni/Ce比主要影响催化剂表面晶格氧空位的数量以及活性组分和载体之间的相互作用。其中,Ni/Ce物质的量比为1∶9时,催化剂表面氧空位数量较多,因此,表现出优良的催化性能。在反应温度为200 ℃、氧过量系数为5、气体总空速为60000 mL/(gcat·h)的条件下,CO转化率为99.2%。此外,与传统液相制备催化剂技术相比,球磨法具有污染小、成本低、易操作等特点,有利于节约能源。
  • 图  1  NiO/CeO2催化剂和参比样的XRD谱图

    Figure  1  XRD patterns of the NiO/CeO2 catalysts and reference sample a: CeO2; b: NC-0.5; c: NC-1; d: NC-2

    图  2  NiO/CeO2催化剂N2吸附-脱附等温线

    Figure  2  N2 adsorption desorption and desorption isotherms of NiO/CeO2 catalysts a: CeO2; b: NC-0.5; c: NC-1; d: NC-2

    图  3  NiO/CeO2催化剂的H2-TPR谱图

    Figure  3  H2-TPR spectra of NiO/CeO2 catalysts a: CeO2; b: NC-0.5; c: NC-1; d: NC-2

    图  4  NiO/CeO2催化剂的Ce 3d XPS谱图

    Figure  4  Ce 3d XPS spectra of the NiO/CeO2 catalysts a: CeO2; b: NC-0.5; c: NC-1; d: NC-2

    图  5  NiO/CeO2催化剂的O 1s XPS谱图

    Figure  5  O 1s XPS spectra of the NiO/CeO2 catalysts a: 0.5-NiO/CeO2; b: 1-NiO/CeO2; c: 2-NiO/CeO2

    图  6  NiO/CeO2催化剂的Ni 2p XPS谱图

    Figure  6  Ni 2p XPS spectra of the NiO/CeO2 catalysts a: 0.5-NiO/CeO2; b: 1-NiO/CeO2; c: 2-NiO/CeO2

    图  7  NiO/CeO2催化剂的CO转化率

    Figure  7  CO conversion diagram of NiO/CeO2 catalyst

    a: CeO2; b: NC-0.5; c: NC-1; d: NC-2; e: complete conversion

    表  1  NiO/CeO2催化剂的XRD分析

    Table  1  XRD data of NiO/CeO2 catalysts

    SampleCell parameter/nmCrystallite size of CeO2/nm
    CeO2 0.5410 22.0
    NC-0.5 0.5408 21.9
    NC-1 0.5399 20.9
    NC-2 0.5409 20.8
    下载: 导出CSV

    表  2  NiO/CeO2催化剂的BET分析

    Table  2  BET analysis of NiO/CeO2 catalyst

    SampleSBET/(m2·g−1)Pore size/nm
    CeO2 24.3 9.49
    CeO2 34.6 9.46
    NC-0.5 36.1 12.85
    NC-1 34.5 11.90
    NC-2 32.3 9.18
    下载: 导出CSV

    表  3  NiO/CeO2催化剂的Ni元素含量

    Table  3  Ni element content of NiO/CeO2 catalyst

    SampleTarget content of Ni/%Ni content/%a
    CeO2
    NC-0.52.202.08
    NC-14.063.76
    NC-29.809.85
    a: determined by XRF experiment
    下载: 导出CSV

    表  4  NiO/CeO2催化剂还原峰位置

    Table  4  Location of reduction peak of NiO/CeO2 catalyst

    SampleLocation of reduction peak /℃
    αβγε/εk/k
    CeO2 500 833
    NC-0.5 182 246 294 453 831
    NC-1 180 223 294 455 824
    NC-2 187 249 327 456 830
    下载: 导出CSV

    表  5  NiO/CeO2催化剂中晶格氧含量

    Table  5  Lattice oxygen content in NiO/CeO2 catalyst

    CatalystOlat/(Olat+Oads)/%
    0.5-NiO/CeO260
    1-NiO/CeO277
    2-NiO/CeO255
    下载: 导出CSV

    表  6  NC-1催化剂与同类文献的转化率对比

    Table  6  Comparison of conversion rate between NC-1 catalyst and similar literatures

    Samplet/℃GHSV/h−1λConversion/%
    NC-120060000599
    Meso-Ni0.1Ce[16]2001200002180
    Ni-CeO2 NRs[15]200288001010
    Ce-Ni[14]2003000028100
    下载: 导出CSV
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  • 收稿日期:  2021-12-25
  • 录用日期:  2022-03-15
  • 修回日期:  2022-02-08
  • 网络出版日期:  2022-03-25

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