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黄陵煤显微组分性质及原位热解实验研究

王越 丁华 武琳琳 张昀朋 周琦 曲思建

王越, 丁华, 武琳琳, 张昀朋, 周琦, 曲思建. 黄陵煤显微组分性质及原位热解实验研究[J]. 燃料化学学报. doi: 10.1016/S1872-5813(21)60102-0
引用本文: 王越, 丁华, 武琳琳, 张昀朋, 周琦, 曲思建. 黄陵煤显微组分性质及原位热解实验研究[J]. 燃料化学学报. doi: 10.1016/S1872-5813(21)60102-0
WANG Yue, DING Hua, WU Lin-lin, ZHANG Yun-peng, ZHOU Qi, QU Si-jian. The characteristics of maceral in Huangling coal and its in-situ pyrolysis[J]. Journal of Fuel Chemistry and Technology. doi: 10.1016/S1872-5813(21)60102-0
Citation: WANG Yue, DING Hua, WU Lin-lin, ZHANG Yun-peng, ZHOU Qi, QU Si-jian. The characteristics of maceral in Huangling coal and its in-situ pyrolysis[J]. Journal of Fuel Chemistry and Technology. doi: 10.1016/S1872-5813(21)60102-0

黄陵煤显微组分性质及原位热解实验研究

doi: 10.1016/S1872-5813(21)60102-0
基金项目: 煤科院科技发展基金(2020CX-Ⅱ-07)资助
详细信息
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    Tel: 010-84263443, E-mail: wangyue8211@sina.com

  • 中图分类号: P618

The characteristics of maceral in Huangling coal and its in-situ pyrolysis

Funds: The project was supported by the Fund for Development of Science and Technology of CCRI (2020CX-Ⅱ-07)
  • 摘要: 为了揭示煤中不同组分的热解特征和成焦规律,利用离心分离获取黄陵煤的显微组分富集物,研究显微组分的热解特性,利用显微镜热台原位观测热解过程中显微组分的软化熔融特征。结果发现,镜质组和惰质组富集物的纯度分别可达90%和80%以上,壳质组富集物的纯度接近70%。壳质组的初始热解温度在385 ℃左右,其他显微组分的初始热解温度在410 ℃左右,最大热解温度为470−480 ℃,最大失重速率和热解总失重率均以壳质组、镜质组、半镜质组和惰质组的次序降低。显微热台原位热解实验表明,壳质组(含腐泥基质)的软化温度为350−370 ℃;镜质组的软化温度为410−420 ℃,热解过程经历边缘钝化、气孔产生、表面软化、液相生成和冷却固化等阶段;半镜质组仅呈现微小的形态变化,惰质组未发生变化。黄陵煤中的活性组分为镜质组和壳质组,壳质组对共生镜质组的软化具有促进作用。
  • 图  1  热解特征参数示意图

    ta-initial pyrolysis temperature; tb-maximum pyrolysis temperature; tc-pyrolysis ending temperature

    Figure  1  Diagram of characteristic parameters during pyrolysis

    图  2  显微镜热台温度校准曲线

    Figure  2  Calibration curve of temperature of the heating stage microscope

    图  3  各显微组分富集物的解离特征

    ( (a)−(d):Reflected polarized light, oil immersed, 500 × ; (e): Reflected fluorescent light, oil immersed, 500 × )

    Figure  3  Liberation characteristics of the enriched macerals

    图  4  显微组分芳香度和H/C比的关系

    Figure  4  Relationship between aromaticity and H/C (atomic ratio) of macerals

    图  5  显微组分富集物的热重热解曲线

    Figure  5  Thermogravimetric curves of pyrolysis of the enriched macerals

    图  6  壳质组、镜质组、半镜质组和惰质组的红外光谱谱图

    Figure  6  FT-IR spectrograms of liptinite, vitrinite, semi-vitrinite and inertinite

    图  7  热解过程中壳质组的变化特征(反射光,干物镜,×500)

    Figure  7  Optical changes of liptinite during pyrolysis (reflected light, air, ×500)

    图  8  热解过程中镜质组的变化特征(反射光,干物镜,×500)

    Figure  8  Optical changes of vitrinite during pyrolysis (reflected light, air, ×500)

    图  9  热解过程中半镜质组和惰质组的变化特征(反射光,干物镜,×500 )

    Figure  9  Optical changes of semi-vitrinite and inertinite during pyrolysis (reflected light, air, ×500 )

    表  1  实验样品的基本煤质特征

    Table  1  Basic characteristics of the coal sample

    Proximate analysis/%Ultimate analysis wdaf/%
    MadAdVdafFCdafCHNS$ {\rm{O}}^{*} $
    2.917.3436.1363.8784.865.261.480.567.84
    St,d/%GR.IPlastometric index/mmAudibert-Arnu dilatometer
    XYt1/ ℃t2/ ℃t3/ ℃a/%b/%
    0.546046113393754410.53.33
    *by difference. X: final contraction of plastometric layer; Y: maximum thickness of plastometric layer; t1: softening temperature; t2: initial dilation temperature; t3: solidification temperature; a: maximum contraction; b: maximum dilation
    下载: 导出CSV

    表  2  黄陵煤的煤岩分析

    Table  2  Petrographic composition of Huangling coal

    Maceral group composition φ/%$ R^{ \circ }_{{\rm{max}}} $/%
    VitriniteSemi-vitriniteInertiniteLiptiniteMineral
    52.95.434.37.41.00.77
    $ R^{ \circ }_{{\rm{max}}} $: maximum reflectance of vitrinite
    下载: 导出CSV

    表  3  显微组分富集物的分离密度及纯度

    Table  3  Separation density and petrographic composition of the enriched macerals

    SampleSeparation density /(g·cm−3)Maceral group composition (vol, mineral free, %)
    VitriniteSemi-vitriniteInertiniteLiptinite
    L-R< 1.26025.71.54.868.0
    V-R1.300−1.32092.71.03.23.1
    SV-R1.320−1.35026.840.929.82.5
    I-R1.400−1.45010.18.680.90.4
    下载: 导出CSV

    表  4  各显微组分富集物的煤质特征

    Table  4  Characteristics of the enriched macerals

    SampleProximate analysis w/%Ultimate analysis wdaf/%St,d/%GR.ITRD
    MadAdVdafFCdCHNS${\rm{O} }^{*}$
    L-R 2.21 0.94 54.45 45.12 82.92 6.32 1.38 0.30 9.08 0.30 84 1.248
    V-R 2.42 0.99 43.78 55.66 84.24 5.46 1.59 0.28 8.43 0.28 86 1.312
    SV-R 2.51 2.48 36.02 62.39 85.12 5.02 1.47 0.30 8.09 0.29 18.8 1.324
    I-R 2.62 4.26 33.24 63.92 85.98 4.80 1.32 0.37 7.53 0.35 4.6 1.427
    *: by difference
    下载: 导出CSV

    表  5  纯显微组分的理论煤质特征

    Table  5  Characteristics of the pure macerals

    MaceralTRDVdmmf/%Ultimate analysis wdmmf/%H/Cfa
    CHNS${\rm{O} }^{*}$
    Liptinite1.20165.7781.967.221.350.299.181.060.40
    Vitrinite1.31043.8984.785.641.620.327.640.800.64
    Semi-Vitrinite1.32240.2185.655.481.550.376.950.770.68
    Inertinite1.45425.1488.434.461.300.215.600.610.82
    *: by difference
    下载: 导出CSV

    表  6  显微组分富集物的热解失重特征

    Table  6  Characteristic parameters of pyrolysis of the enriched macerals

    ParameterL-RV-RSV-RI-R
    ta/ ℃ 385 405 410 410
    tb/ ℃ 472 472 478 480
    tc/ ℃ 513 530 540 540
    Maximum decomposition rate/(%·min−1) 10.80 9.10 5.65 4.32
    下载: 导出CSV
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  • 收稿日期:  2021-03-31
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