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沉淀剂对CuZnAl催化剂糠醛气相加氢制糠醇选择性的影响

黄玉辉 任国卿 孙蛟 王重庆 陈晓蓉 梅华

黄玉辉, 任国卿, 孙蛟, 王重庆, 陈晓蓉, 梅华. 沉淀剂对CuZnAl催化剂糠醛气相加氢制糠醇选择性的影响[J]. 燃料化学学报, 2016, 44(6): 726-731.
引用本文: 黄玉辉, 任国卿, 孙蛟, 王重庆, 陈晓蓉, 梅华. 沉淀剂对CuZnAl催化剂糠醛气相加氢制糠醇选择性的影响[J]. 燃料化学学报, 2016, 44(6): 726-731.
HUANG Yu-hui, REN Guo-qing, SUN Jiao, WANG Chong-qing, CHEN Xiao-rong, MEI Hua. Effect of precipitant on the performance of CuZnAl catalysts in the gas phase selective hydrogenation of furfural to furfuryl alcohol[J]. Journal of Fuel Chemistry and Technology, 2016, 44(6): 726-731.
Citation: HUANG Yu-hui, REN Guo-qing, SUN Jiao, WANG Chong-qing, CHEN Xiao-rong, MEI Hua. Effect of precipitant on the performance of CuZnAl catalysts in the gas phase selective hydrogenation of furfural to furfuryl alcohol[J]. Journal of Fuel Chemistry and Technology, 2016, 44(6): 726-731.

沉淀剂对CuZnAl催化剂糠醛气相加氢制糠醇选择性的影响

详细信息
  • 中图分类号: O643.38

Effect of precipitant on the performance of CuZnAl catalysts in the gas phase selective hydrogenation of furfural to furfuryl alcohol

More Information
  • 摘要: 采用共沉淀法制得分别以NaOH、Na2CO3和Na2CO3/NaOH为沉淀剂的CuZnAl-1、CuZnAl-2和CuZnAl-3催化剂, 采用X射线衍射 (XRD)、N2吸附-脱附、H2-程序升温还原 (H2-TPR)、热重和NH3-程序升温脱附 (NH3-TPD) 等方法对催化剂进行了表征, 并在固定床反应器上研究了沉淀剂对CuZnAl催化剂糠醛气相加氢制糠醇选择性的影响。结果表明, 糠醛加氢在三种催化剂上均有较高转化率, 而CuZnAl-3催化剂对糠醇有较高选择性。沉淀剂对CuZnAl催化剂的物相结构、比表面积、酸性和氧化还原性均有较大影响。以Na2CO3/NaOH为沉淀剂得到的CuZnAl-3催化剂具有适宜的比表面积、CuO晶相、较弱的酸性位, 且表面CuO易于还原, 这些因素有利于催化反应生成糠醇。CuZnAl-3催化剂上糠醛气相加氢制糠醇优化工艺参数为:常压、反应温度180℃、氢醛物质的量比为5:1、糠醛体积空速0.3h-1; 糠醛转化率为99.4%, 糠醇选择性为98.3%。
  • 图  1  不同沉淀剂制备催化剂样品前驱体XRD谱图

    Figure  1  XRD patterns of the precursor CuZnAl catalysts obtained with different precipitants

    a: CuZnAl-1; b: CuZnAl-2; c: CuZnAl-3

    图  2  不同沉淀剂制备CuZnAl催化剂的XRD谱图

    Figure  2  XRD patterns of the CuZnAl catalysts

    prepared with different precipitants a: CuZnAl-2; b: CuZnAl-1; c: CuZnAl-3

    图  3  不同沉淀剂制备催化剂前驱体的TG曲线

    Figure  3  TG profiles of the precursor CuZnAl catalysts obtained with different precipitants

    a: CuZnAl-1; b: CuZnAl-2; c: CuZnAl-3

    图  4  不同沉淀剂制备催化剂的NH3-TPD谱图

    Figure  4  NH3-TPD profiles of the CuZnAl catalysts prepared with different precipitants

    a: CuZnAl-1; b: CuZnAl-2; c: CuZnAl-3; d: CuZnAl-3 blank test

    图  5  不同沉淀剂制备催化剂的H2-TPR谱图

    Figure  5  H2-TPR spectra of the CuZnAl catalysts prepared with different precipitants

    a: CuZnAl-2; b: CuZnAl-1; c: CuZnAl-3

    图  6  反应温度对催化性能的影响

    Figure  6  Effect of reaction temperature on the gas phase selective hydrogenation of furfural to furfuryl alcohol over the CuZnAl-3 catalyst

    图  7  体积空速对催化性能的影响

    Figure  7  Effect of furfural volume space velocity on the gas phase selective hydrogenation of furfural to furfuryl alcohol over the CuZnAl-3 catalyst

    图  8  氢醛物质的量比对催化性能的影响

    Figure  8  Effects of mole ratios of hydrogen to furfural on the gas phase selective hydrogenation of furfural to furfuryl alcohol over the CuZnAl-3 catalyst

    图  9  CuZnAl-3上糠醛加氢制糠醇稳定性

    Figure  9  Stability test of the CuZnAl-3 catalyst in the hydrogenation of furfural to furfuryl alcohol

    表  1  不同沉淀剂对所制备的催化剂糠醛加氢性能的影响

    Table  1  Effect of precipitant on the catalytic performance of CuZnAl in the gas phase selective hydrogenation of furfural (FFR) to furfuryl alcohol (FOL)

    CatalystFFR
    conversion x/%
    Selectivity s/%
    2-MFFOLothers
    CuZnAl-199.950.528.321.2
    CuZnAl-299.834.149.616.3
    CuZnAl-399.40.898.30.9
    notes: 2-MF, 2-methyl furan; others include tetrahydrofurfuryl alcohol, cyclopentanone, and cyclopentanol
    下载: 导出CSV

    表  2  不同沉淀剂制备的CuZnAl催化剂的比表面积和孔结构性质

    Table  2  Textural properties of the CuZnAl catalysts prepared with different precipitants

    CatalystBET
    A/(m2·g-1)
    Pore volume
    v/(cm3·g-1)
    Average pore
    diameter d/nm
    CuZnAl-183.330.273.72
    CuZnAl-273.310.313.43
    CuZnAl-341.680.173.29
    note: pore volume was determined on the basis of the nitrogen adsorption at a relative pressure of 0.99
    下载: 导出CSV
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出版历程
  • 收稿日期:  2016-02-26
  • 修回日期:  2016-03-31
  • 网络出版日期:  2021-01-23
  • 刊出日期:  2016-06-10

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