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首页> 外文期刊>International Journal of Coal Geology >Structural characterization of vitrinite-rich and inertinite-rich Permian-aged South African bituminous coals
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Structural characterization of vitrinite-rich and inertinite-rich Permian-aged South African bituminous coals

机译：富含镜质岩和富含惰质岩的二叠纪年龄的南非烟煤的结构表征

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摘要

Two South African coals of the same rank and age, but different in maceral composition were subjected to extensive structural analyses. Inertinite-rich Highveld coal (dominated by semifusinite) and vitrinite-rich Waterberg coal were studied to determine structural differences and similarities. The two coals had similar carbon content (～84%, dmmf) and vitrinite reflectance (mean-maximum 0.71% for vitrinite-rich vs. 0.75% for inertinite-rich), but differed in hydrogen content (6.23% for vitrinite-rich and 4.53% for inertinite-rich). The inertinite-rich coal was more aromatic (86% for inertinite-rich and 76% for vitrinite-rich) and more polycondensed (indicated by a higher bridgehead carbon content). The inertinite-rich coal was structurally more ordered, with a higher degree of crystalline stacking. Both coals had similar average aromatic cluster sizes (16 carbons for vitrinite-rich and 18 carbons for inertinite-rich) and number of cluster attachments (6 attachments for vitrinite-rich and 5 attachments for inertinite-rich). Mass spectrometry showed that both coals consist of similar molecular weight distributions; ranging to approximately 1700 m/z with a maximum abundance of ～450 m/z for the vitrinite-rich coal and ～ 550 m/z for the inertinite-rich coal. Compared to the Argonne Premium coals the South African vitrinite-rich Waterberg coal was comparable to the coals in the high-volatile bituminous range and inertinite-rich Highveld was closer to the medium- to low-volatile bituminous range. Both coals were surprisingly similar in bulk characterization, although inertinite-rich Highveld coal was structurally more ordered, hydrogen deficient, and more aromatic.
机译：对两种等级和年龄相同但组成不同的南非煤炭进行了广泛的结构分析。研究了富含惰质岩的Highveld煤（由半次纤铁矿占主导）和富含镜质石的Waterberg煤，以确定其结构差异和相似性。两种煤具有相似的碳含量（〜84％，dmmf）和镜质反射率（富含镜质的平均最大值为0.71％，富含惰质石的平均最大值为0.75％），但是氢含量不同（富含镜质和含氢的6.23％）。 4.53％（富含惰性）。富含惰质岩的煤具有更高的芳香性（富含惰质岩为86％，富含镜质岩为76％）和更多的缩聚态（桥头碳含量更高）。富含惰化石的煤在结构上更有序，具有更高的晶体堆积度。两种煤均具有相似的平均芳香族团簇大小（富含镜质的碳为16个碳，富含惰质石的为18个碳）和团簇附着物的数量（富含镜质的为6个附着物，富含惰质的为5个附着物）。质谱分析表明，两种煤均具有相似的分子量分布。富镁质煤的最大丰度约为1700 m / z，富钙质石煤的最大丰度约为450 m / z。与Argonne Premium煤相比，南非富含镜质石的Waterberg煤可与高挥发分沥青范围的煤相比，而富含惰质石的Highveld则更接近中挥发分煤。两种煤炭的体积特征出乎意料地相似，尽管富含惰质石的Highveld煤炭在结构上更有序，氢缺乏且更具芳香性。

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  • 来源
    《International Journal of Coal Geology》 |2008年第4期|p.290-300|共11页
  • 作者

    Daniel Van Niekerk; Ronald J. Pugmire; Mark S. Solum; Paul C. Painter; Jonathan P. Mathews;

  • 作者单位

    Energy and Mineral Engineering and the EMS Energy Institute, Pennsylvania State University, Hosier Building, University Park, PA 16802, USA;

    Department of Chemical Engineering, University of Utah, Salt Lake City, Utah 84112, USA,Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, USA;

    Department of Chemistry, University of Utah, Salt Lake City, Utah 84112, USA;

    Department of Materials Science and Engineering Pennsylvania State University, 320 Steidle Building, University Park, PA 16802, USA;

    rnEnergy and Mineral Engineering and the EMS Energy Institute, Pennsylvania State University, Hosier Building, University Park, PA 16802, USA;

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  • 正文语种 eng
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  • 关键词

    South African coal; permian; macerals; semifusinite; waterberg; highveld;

    机译：南非煤炭;二叠纪黄石半纤锌矿;水山高地;

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