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催化裂化反应对1-己烯叠合反应的影响规律

宁鑫 廖明杰 刘砚超 郑家军 李文林 李瑞丰

宁鑫, 廖明杰, 刘砚超, 郑家军, 李文林, 李瑞丰. 催化裂化反应对1-己烯叠合反应的影响规律[J]. 燃料化学学报(中英文), 2022, 50(2): 237-242. doi: 10.1016/S1872-5813(21)60143-3
引用本文: 宁鑫, 廖明杰, 刘砚超, 郑家军, 李文林, 李瑞丰. 催化裂化反应对1-己烯叠合反应的影响规律[J]. 燃料化学学报(中英文), 2022, 50(2): 237-242. doi: 10.1016/S1872-5813(21)60143-3
NING Xin, LIAO Ming-jie, LIU Yan-chao, ZHENG Jia-jun, LI Wen-lin, LI Rui-feng. Investigation of the interactions for the 1-hexene oligomerization and the catalytic cracking reactions[J]. Journal of Fuel Chemistry and Technology, 2022, 50(2): 237-242. doi: 10.1016/S1872-5813(21)60143-3
Citation: NING Xin, LIAO Ming-jie, LIU Yan-chao, ZHENG Jia-jun, LI Wen-lin, LI Rui-feng. Investigation of the interactions for the 1-hexene oligomerization and the catalytic cracking reactions[J]. Journal of Fuel Chemistry and Technology, 2022, 50(2): 237-242. doi: 10.1016/S1872-5813(21)60143-3

催化裂化反应对1-己烯叠合反应的影响规律

doi: 10.1016/S1872-5813(21)60143-3
基金项目: 国家自然科学基金(21706177,U19B2003)和山西省科技创新重点团队项目(2014131006)资助
详细信息
    通讯作者:

    E-mail:liwenlin@tyut.edu.cn

  • 中图分类号: O643.32

Investigation of the interactions for the 1-hexene oligomerization and the catalytic cracking reactions

Funds: The project was supported by the National Natural Science Foundation of China (21706177, U19B2003) and Shanxi Science and Technology Innovation Key Team Project (2014131006)
  • 摘要: 分别以1,3,5-三异丙苯和正辛烷为不同分子尺寸催化裂解原料,以1-己烯为叠合原料,评估了合成的多级孔ZSM-5分子筛催化剂上催化裂化反应和烯烃叠合反应的耦合机制。模型化合物催化裂解反应结果表明,在合成的多级孔ZSM-5分子筛上不同尺寸分子裂解性能受到抑制,1,3,5-TIPB裂解能力下降,正辛烷裂解初始转化率由70%降低到20%。而多级孔ZSM-5分子筛的1-己烯叠合催化活性得到提升,高于工业ZSM-5分子筛,叠合产物以二聚物为主。分子筛中强酸酸量的降低可抑制催化裂化反应的进行,促进C6烯烃低聚为二聚物和三聚物(航空煤油的理想成分)的能力。因此,从抑制催化裂化的角度进行催化剂设计,可有效提高催化剂的烯烃叠合反应性能。
  • FIG. 1269.  FIG. 1269.

    FIG. 1269.  FIG. 1269.

    图  1  不同分子筛的XRD谱图

    Figure  1  Power XRD patterns of the different zeolites

    图  2  不同样品的NH3-TPD谱图

    Figure  2  NH3-TPD profiles of the different samples

    图  3  不同样品的Py-FTIR谱图

    Figure  3  Py-FTIR spectra of the different samples

    图  4  (a) 1,3,5-TIPB转化率随反应时间的变化,(b) 催化剂初始活性及产物选择性

    Figure  4  (a): 1,3,5-TIPB conversion vs TOS, (b): initial catalyst activity and product selectivity

    图  5  正辛烷转化率随反应时间的变化

    Figure  5  n-octane conversion with time on stream

    图  6  不同分子筛的1-己烯叠合反应 (a) 转化率vs TOS, (b) TOS = 12 h时1-己烯转化率及产物选择性(250 ℃, 4.0 MPa, WHSV = 2.42 h−1)

    Figure  6  1-hexene oligomerization reaction in different zeolites (a): conversion vs TOS, (b): conversion and selectivity at TOS = 12 h (250 ℃, 4.0 MPa, WHSV = 2.42 h−1)

    图  7  反应后催化剂的DTG曲线

    Figure  7  DTG curves of the spent catalysts

    表  1  不同分子筛的孔结构参数

    Table  1  Pore structure parameters of the different zeolites

    SampleSBET
    /(m2·g−1)
    Smic
    /(m2·g−1)
    Sext
    /(m2·g−1)
    vmic
    /(cm3·g−1)
    vmeso
    /(cm3·g−1)
    ZSM-5 (66)302242590.100.04
    ZSM-5 (252)4193171020.130.10
    Commerial ZSM-5442401410.160.05
    下载: 导出CSV

    表  2  不同样品NH3-TPD和Py-FTIR分峰拟合

    Table  2  Peak fitting results of NH3-TPD and Py-FTIR for different samples

    SampleWeak acid Strong acidTotal peaks areaAcidity/(μmol·g−1)[a]
    t/℃peaks area t/℃peaks areaBrønstedLewis
    ZSM-5 (66) 234 550 346 150 1050 68.53 73.43
    430 350
    ZSM-5 (252) 243 283 348 70 533 44.77 161.07
    425 180
    Commerial ZSM-5 239 1877 343 472 4149
    445 1800
    [a] : Brønsted, Lewis acid calculation results at 150 ℃
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-05-07
  • 修回日期:  2021-07-26
  • 网络出版日期:  2021-08-20
  • 刊出日期:  2022-02-12

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