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TiO2负载V-W复合双金属催化剂氯苯催化燃烧性能研究

邢德风 王胜 王建成 潘大海 宋学顶

邢德风, 王胜, 王建成, 潘大海, 宋学顶. TiO2负载V-W复合双金属催化剂氯苯催化燃烧性能研究[J]. 燃料化学学报. doi: 10.1016/S1872-5813(22)60010-0
引用本文: 邢德风, 王胜, 王建成, 潘大海, 宋学顶. TiO2负载V-W复合双金属催化剂氯苯催化燃烧性能研究[J]. 燃料化学学报. doi: 10.1016/S1872-5813(22)60010-0
XING De-feng, WANG Sheng, WANG Jian-cheng, Pan Dahai, SONG Xue-ding. Study on catalytic combustion of chlorobenzene over TiO2-supported V-W composite bimetallic catalysts[J]. Journal of Fuel Chemistry and Technology. doi: 10.1016/S1872-5813(22)60010-0
Citation: XING De-feng, WANG Sheng, WANG Jian-cheng, Pan Dahai, SONG Xue-ding. Study on catalytic combustion of chlorobenzene over TiO2-supported V-W composite bimetallic catalysts[J]. Journal of Fuel Chemistry and Technology. doi: 10.1016/S1872-5813(22)60010-0

TiO2负载V-W复合双金属催化剂氯苯催化燃烧性能研究

doi: 10.1016/S1872-5813(22)60010-0
基金项目: 国家自然科学基金重点项目(U20A20132)资助
详细信息
    通讯作者:

    E-mail: wangsheng@dicp.ac.cn

  • 中图分类号: X511

Study on catalytic combustion of chlorobenzene over TiO2-supported V-W composite bimetallic catalysts

Funds: The project was supported by National Natural Science Foundation of China (U20A20132)
More Information
  • 摘要: 本研究采用等体积浸渍法制备了一系列TiO2负载V-W双金属氧化物催化剂,考察了V/W比例对于氯苯催化燃烧活性和HCl选择性的影响,结果表明,适量W的掺杂(5V5W-Ti 和3V7W-Ti),提高了氯苯催化燃烧活性和HCl选择性。结合BET、XRD、XPS、H2-TPR、NH3-TPD和Py-FTIR等表征,说明其高的活性是由于其高活性组分分散度和丰富的催化剂表面吸附氧;适量W的掺杂显著增强了催化剂表面酸性,尤其是强酸和Brønsted酸,从而提高了产物中HCl的选择性。
  • 图  1  xV(10-x)W-Ti催化剂的XRD谱图

    Figure  1  XRD profiles of xV(10-x)W-Ti catalysts

    图  2  xV(10-x)W-Ti催化剂的H2-TPR谱图

    Figure  2  H2-TPR profiles of xV(10-x)W-Ti catalysts

    图  3  xV(10-x)W-Ti催化剂的NH3-TPD谱图

    Figure  3  NH3-TPD profiles of xV(10-x)W-Ti catalysts

    图  4  10V-Ti、5V5W-Ti和1V9W-Ti催化剂的Py-FTIR谱图

    Figure  4  Py-FTIR profiles of 10V-Ti, 5V5W-Ti and 1V9W-Ti catalysts

    图  5  10V-Ti、5V5W-Ti和1V9W-Ti催化剂的(a) Ti 2p, (b) V 2p, (c) W 4f和(d) O 1s轨道的XPS谱图

    Figure  5  XPS spectra of (a) Ti 2p, (b) V 2p, (c) W 4f and (d) O 1s for 10V-Ti, 5V5W-Ti and 1V9W-Ti catalysts

    图  6  xV(10-x)W-Ti催化剂对(a)CB转化率和(b)HCl生成率的影响

    Figure  6  Effect of xV(10-x)W-Ti catalysts on (a) CB conversion and (b) HCl production GHSV = 20,000 h−1, CB = 100 μg/mL.

    图  7  (a)10V-Ti催化剂的氯苯催化氧化活性曲线;(b)分别在300和325 ℃下对10V-Ti催化剂进行长期稳定性实验

    Figure  7  (a) Activity curve of chlorobenzene catalytic oxidation of 10V-Ti catalyst; (b) long-term stability experiment of 10V-Ti catalyst at 300 and 325 ℃ respectively (GHSV = 20000 h−1, CB = 1000 μg/mL)

    表  1  xV(10-x)W-Ti催化剂的比表面积和孔容

    Table  1  Specific surface area and pore volume of xV(10-x)W-Ti catalysts

    SampleSBET/(m2·g−1Pore volume/(mL·g−1
    a-TiO289.730.26
    10V-Ti33.040.18
    9V1W-Ti54.710.16
    5V5W-Ti50.350.20
    3V7W-Ti51.960.22
    1V9W-Ti69.810.23
    下载: 导出CSV

    表  2  10V-Ti、5V5W-Ti和1V9W-Ti催化剂的酸量

    Table  2  Acid amount of 10V-Ti, 5V5W-Ti and 1V9W-Ti catalysts

    SampleB acid/ (μmol·g−1)L acid/ (μmol·g−1)Total acidity/ (μmol·g−1)
    1V9W-Ti51.0328.2979.32
    5V5W-Ti50.8361.21112.03
    10V-Ti14.2659.3773.63
    下载: 导出CSV

    表  3  10V-Ti、5V5W-Ti和1V9W-Ti催化剂表面元素价态及不同氧物种含量

    Table  3  Surface elemental valence states and oxygen species content of 10V-Ti,5V5W-Ti and 1V9W-Ti catalysts

    SampleV5+/(V5++V4+)Oβ/(Oα+Oβ+Oγ)Oγ/(Oα+Oβ+Oγ)
    1V9W-Ti0.650.140.06
    5V5W-Ti0.730.160.06
    10V-Ti0.640.120.05
    下载: 导出CSV
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  • 收稿日期:  2022-02-26
  • 录用日期:  2022-03-28
  • 修回日期:  2022-03-24
  • 网络出版日期:  2022-04-06

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