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制备工艺对 Fe-Ag/Al2O3 催化剂的丙烯选择催化还原脱硝性能的影响

田凤国 杨溪 温妮妮 苏亚欣

田凤国, 杨溪, 温妮妮, 苏亚欣. 制备工艺对 Fe-Ag/Al2O3 催化剂的丙烯选择催化还原脱硝性能的影响[J]. 燃料化学学报(中英文), 2021, 49(11): 1631-1637. doi: 10.1016/S1872-5813(21)60121-4
引用本文: 田凤国, 杨溪, 温妮妮, 苏亚欣. 制备工艺对 Fe-Ag/Al2O3 催化剂的丙烯选择催化还原脱硝性能的影响[J]. 燃料化学学报(中英文), 2021, 49(11): 1631-1637. doi: 10.1016/S1872-5813(21)60121-4
TIAN Feng-guo, YANG Xi, WEN Ni-ni, SU Ya-xin. Effect of preparation method on the performance of Fe-Ag/Al2O3 catalyst in the selective catalytic reduction of NO with propene[J]. Journal of Fuel Chemistry and Technology, 2021, 49(11): 1631-1637. doi: 10.1016/S1872-5813(21)60121-4
Citation: TIAN Feng-guo, YANG Xi, WEN Ni-ni, SU Ya-xin. Effect of preparation method on the performance of Fe-Ag/Al2O3 catalyst in the selective catalytic reduction of NO with propene[J]. Journal of Fuel Chemistry and Technology, 2021, 49(11): 1631-1637. doi: 10.1016/S1872-5813(21)60121-4

制备工艺对 Fe-Ag/Al2O3 催化剂的丙烯选择催化还原脱硝性能的影响

doi: 10.1016/S1872-5813(21)60121-4
基金项目: 上海市自然科学基金(19ZR1401800)和中央高校基本科研业务费专项资金和东华大学研究生创新基金(CUSF-DH-D-2021032)资助
详细信息
    作者简介:

    田凤国:fg.tian@dhu.edu.cn

    通讯作者:

    Tel:021-67792552,E-mail:suyx@dhu.edu.cn

  • #: 共同第一作者
  • 中图分类号: X511

Effect of preparation method on the performance of Fe-Ag/Al2O3 catalyst in the selective catalytic reduction of NO with propene

Funds: The project was supported by the Natural Science Foundation of Shanghai (19ZR1401800) and Fundamental Research Funds for the Central Universities and Graduate Student Innovation Fund of Donghua University (CUSF-DH-D-2021032)
  • 摘要: 前期研究表明Fe-Ag/Al2O3/CM催化剂具有较好的选择催化还原脱硝与抗水抗硫性能。为此,本文考察了制备工艺对其丙烯选择性催化还原脱硝性能的影响。先后选取了3种活性组分负载方式,即物理研磨法、直接浸渍法和溶胶-凝胶-浸渍法。结果发现,三组催化剂都具有很好的抗H2O和SO2的能力,但就最大脱硝效率而言,溶胶-凝胶-浸渍法(100%)优于物理研磨法(62%)和直接浸渍法(58%)。多种表征测试结果表明,影响催化剂性能的主要影响因素为比表面积和铁银之间的相互作用。对于溶胶-凝胶-浸渍法制得的催化剂样品,第一载体堇青石与第二载体Al2O3共同作用,既能保证很高的比表面积,同时有利于Fe和Ag离子之间的相互作用,形成了AgFeO2双金属氧化物活性成分,还原性最强。对于物理研磨法,催化剂呈粉末状,虽然比表面积最大,但Fe和Ag以氧化物形态(Ag2O和Fe3O4)和少许的单质Ag形式存在,两种金属相互作用弱、还原性差。对于直接浸渍法,由于缺少第二载体Al2O3的分散作用,Fe和Ag以各自氧化物呈方块晶体在催化剂表面团聚,比表面积最小,催化活性最低。
    1)  #: 共同第一作者
  • FIG. 1059.  FIG. 1059.

    FIG. 1059.  FIG. 1059.

    图  1  不同制备方式催化剂的活性

    Figure  1  Impacts of preparation methods on the performance of Fe-Ag/Al2O3 catalyst in the selective catalytic reduction of NO with propene

    (0.05% NO, 0.5% C3H6, 3% O2 and N2 for balance)

    图  2  H2O和SO2对催化剂活性的影响

    Figure  2  Effect of H2O and SO2 on the catalytic activity

    (0.05% NO, 0.5% C3H6, 3% O2, 8% H2O, 0.02% SO2 and N2 for balance)

    图  3  催化剂表面形貌的SEM照片(×5000)

    Figure  3  SEM images of various catalysts prepared by different methods (5000×)

    图  4  不同方法所制样品的XRD谱图

    Figure  4  XRD patterns of various catalysts prepared by different methods

    图  5  催化剂的N2吸附-脱附等温曲线

    Figure  5  N2 adsorption/desorption isotherms of various catalysts

    (empty symbols = adsorption; solid symbols = desorption)

    图  6  催化剂样品的H2-TPR谱图

    Figure  6  H2-TPR profiles of various catalysts

    表  1  催化剂的微孔隙特性

    Table  1  Textural properties of various catalysts

    CatalystABET/(m2·g−1)νp/(cm3·g−1)dp/nm
    GR-Fe/Ag/Al2O3370.05820.9
    DP-Fe/Ag/CM50.02610.2
    DP-Fe/Ag/Al2O3/ CM230.0549.23
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-04-26
  • 修回日期:  2021-06-01
  • 网络出版日期:  2021-06-25
  • 刊出日期:  2021-11-30

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