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不同基属渣油正戊烷及正庚烷沥青质结构组成研究

孙昱东 王泽州 李茂林 肖胜玉

孙昱东, 王泽州, 李茂林, 肖胜玉. 不同基属渣油正戊烷及正庚烷沥青质结构组成研究[J]. 燃料化学学报. doi: 10.19906/j.cnki.JFCT.2022018
引用本文: 孙昱东, 王泽州, 李茂林, 肖胜玉. 不同基属渣油正戊烷及正庚烷沥青质结构组成研究[J]. 燃料化学学报. doi: 10.19906/j.cnki.JFCT.2022018
SUN Yu-dong, WANG Ze-zhou, LI Mao-lin, XIAO Sheng-yu. Structure and composition of n-pentane and n-heptane asphaltene from different properties crude[J]. Journal of Fuel Chemistry and Technology. doi: 10.19906/j.cnki.JFCT.2022018
Citation: SUN Yu-dong, WANG Ze-zhou, LI Mao-lin, XIAO Sheng-yu. Structure and composition of n-pentane and n-heptane asphaltene from different properties crude[J]. Journal of Fuel Chemistry and Technology. doi: 10.19906/j.cnki.JFCT.2022018

不同基属渣油正戊烷及正庚烷沥青质结构组成研究

doi: 10.19906/j.cnki.JFCT.2022018
详细信息
    通讯作者:

    Tel:150 6683 6878 / 0532-8698 0605, E-mail:ydsun@upc.edu.cn

  • 中图分类号: TE624.5

Structure and composition of n-pentane and n-heptane asphaltene from different properties crude

  • 摘要: 采用SARA四组分分离方法得到石蜡基玉门常压渣油和环烷基马瑞常压渣油的C5和C7沥青质,结合1H-NMR、FT-IR、VPO及元素分析等方法,对沥青质的结构组成和官能团形态进行表征,考察不同基属渣油沥青质以及不同沉淀剂所得沥青质的结构组成差异。结果表明,四种沥青质的官能团类型基本一致,但分子结构单元存在一定差异,相比于环烷基马瑞沥青质,石蜡基玉门沥青质的分子结构单元更大,芳碳分率较小,但HAU/CA值也较小,分子缩合程度更高;随沉淀剂碳链增长,沥青质收率减少(相同原料的正庚烷沥青质收率约为正戊烷沥青质的80%左右),H/C降低,平均相对分子量升高,C7沥青质具有更高的芳碳率$ f $A和更多的结构单元数。各类沥青质中均存在较多的饱和结构,饱和碳分率约为0.5。
  • 图  1  沥青质的核磁共振氢谱谱图

    Figure  1  1H-NMR spectrogram of asphaltene

    图  2  马瑞沥青质的红外光谱谱图

    Figure  2  FT-IR spectrum of MR asphaltene

    图  3  玉门沥青质的红外光谱谱图

    Figure  3  FT-IR spectrum of YM asphaltene

    表  1  原料性质

    Table  1  Properties of residue

    ItemYMARMRAR
    Density (20℃)/(kg·m−3)898.5986.2
    Viscosity (100℃)/(mm2·s−1)10.13130.70
    Carbon residue w/%5.2113.40
    SARA w/%
    Saturate49.6238.04
    Aromatic24.0729.80
    Resin15.5619.34
    Asphaltene10.7512.81
    Elemental w/%
    C86.3084.76
    H12.6010.84
    S0.773.74
    N0.280.51
    H/C(mol ratio)1.751.53
    下载: 导出CSV

    表  2  沥青质收率

    Table  2  Yield of asphaltenes

    AsphalteneC5YMC7YMC5MRC7MR
    Yield w/%13.5810.7516.1113.23
    注:C5–正戊烷沥青质;C7–正庚烷沥青质;YM–玉门常渣;MR–马瑞常渣
    下载: 导出CSV

    表  3  沥青质的元素组成及平均相对分子质量

    Table  3  Element composition and molecular weight of asphaltene

    AsphalteneVitimate analysis w/%H/C
    (mol ratio)
    M
    CHSN
    C5YM85.588.542.101.131.204468
    C7YM86.417.992.421.931.114735
    C5MR83.408.084.701.531.163561
    C7MR82.947.714.811.731.124612
    下载: 导出CSV

    表  4  沥青质中不同化学位移的氢含量

    Table  4  Different H content of asphaltene

    ItemC5YMC7YMC5MRC7MR
    Hγ w/%30.2217.0829.4332.31
    Hβ w/%52.8559.7749.4942.75
    Hα w/%4.8614.976.019.82
    HA w/%12.088.1715.0715.11
    下载: 导出CSV

    表  5  沥青质结构参数

    Table  5  Structural parameters of asphaltene

    Structural parameterC5YMC7YMC5MRC7MR
    CT318.38340.68177.84318.5
    HT378.58375.36205.31352.8
    CA151.94168.3590.66168.77
    RA49.3154.7828.8954.92
    RT54.1269.8230.8658.72
    RN4.8115.041.973.79
    RA/RN10.253.6414.6414.49
    CN14.4345.125.9211.37
    CP152.01127.2181.26138.36
    HAU/CA0.360.350.410.42
    $ f $A
    0.480.490.510.53
    $ f $N
    0.050.130.030.04
    $ f $p0.480.370.460.43
    σ0.170.480.170.25
    n3.173.272.424.72
    Usw1409.471446.251056.29977.54
    CA*47.9351.4237.3935.77
    CT*100.43104.0673.3567.51
    HT*119.42114.6584.6874.78
    RT*17.0721.3312.7312.44
    RA*15.5616.7311.9111.64
    RN*1.524.590.810.80
    下载: 导出CSV
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  • 收稿日期:  2022-01-10
  • 录用日期:  2022-03-21
  • 修回日期:  2022-03-11
  • 网络出版日期:  2022-03-24

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