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Thermal Conversion of Coal-Tar Pitch in the Presence of Silicon Compounds

机译：硅化合物存在下煤焦油沥青的热转化

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摘要

The effect of SiO_2 and polycarbosilane (PCS) additives on the thermal degradation of coal-tar pitch at temperatures to 900℃ was studied by thermogravimetric analysis, differential thermal analysis, mass-spectrometric analysis, IR spectroscopy, and electron microscopy. It was found that, in the presence of the test additives, the character of release and the quantitative composition of volatile degradation products changed, the degree of aromaticity of the carbon residue decreased, and the concentration of oxygen-containing groups in this residue increased. In the case of the PCS additive, the combined thermal conversion of both of the components occurred. In this case, the contribution of structurization processes increased to cause a nonadditive increase in the yield of solid residue. Silicon mainly occurred as organosilicon fragments with Si-C and Si-O-C bonds, an oxycarbide, and, probably, silicon carbide. In the case of the SiO_2 additive, oxidation processes were enhanced; the yield of carbon somewhat decreased, and siloxane groups were present in the solid residue.
机译：通过热重分析，差示热分析，质谱分析，红外光谱和电子显微镜研究了SiO_2和聚碳硅烷（PCS）添加剂对900℃以下煤焦油沥青热降解的影响。发现在测试添加剂的存在下，释放特性和挥发性降解产物的定量组成改变，碳残基的芳香度降低，并且该残基中的含氧基团的浓度增加。在使用PCS添加剂的情况下，两种组分的热转化率都很高。在这种情况下，结构化过程的贡献增加，导致固体残渣产率的非累加增加。硅主要作为具有Si-C和Si-O-C键的有机硅碎片，碳氧化物以及可能的碳化硅出现。在使用SiO_2添加剂的情况下，氧化过程得到了增强。碳的收率有所降低，并且固体残基中存在硅氧烷基团。

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  • 来源
    《Solid Fuel Chemistry》 |2010年第1期|p.5-11|共7页
  • 作者

    O. S. Efimova; G. P. Khokhlova; Yu. F. Patrakov;

  • 作者单位

    Institute of Coal and Coal Chemistry, Siberian Branch, Russian Academy of Sciences, ul. Rukavishnikova 21, Kemerovo, 650610 Russia;

    rnInstitute of Coal and Coal Chemistry, Siberian Branch, Russian Academy of Sciences, ul. Rukavishnikova 21, Kemerovo, 650610 Russia;

    rnInstitute of Coal and Coal Chemistry, Siberian Branch, Russian Academy of Sciences, ul. Rukavishnikova 21, Kemerovo, 650610 Russia;

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