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Mild catalytic depolymerization of low rank coals: a novel way to increase tar yield

机译：低级煤的温和催化解聚：一种增加焦油产量的新方法

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摘要

Mild catalytic depolymerization of two kinds of low-rank coals named as Neimeng and Xinjiang coals sprayed with Mo-and Fe-based catalysts were performed in a batch reactor. The obtained tar was analyzed by gas chromatography/mass spectrometry (GC/MS), and the coal and char were characterized by Raman and Fourier transform infrared spectroscopy (FTIR). The results indicated that the tar yields for Neimeng coal were increased from 3.6% to 5.0% and 7.8% while those for Xinjiang coal were increased from 8.1% to 11.4% and 10.9% after the addition of Mo-and Fe-based catalysts, respectively. Based on the GC/MS analysis, it is found that the hydroxybenzene content was significantly decreased while naphthalene content was increased in the tar derived from Neimeng coal when the Mo-based catalyst was used. In contrast, the production of light aromatics was enhanced by the addition of Fe-based catalyst. For comparison, the production of aromatics from Xinjiang coal was remarkably inhibited but the content of aliphatic hydrocarbon was significantly increased after the addition of the catalyst. The Raman and FTIR analyses results indicated that the catalyst could improve the reaction of hydrogen free radicals with char, which was beneficial to the depolymerization of coal.
机译：在分批反应器中进行温和的催化催化解聚。用Mo-and系催化剂喷射用Mo-x和Fe基催化剂喷射的Neimeng和新疆煤。通过气相色谱/质谱（GC / MS）分析所得焦油，并通过拉曼和傅立叶变换红外光谱（FTIR）以煤和焦炭为特征。结果表明，新疆煤炭的Neimeng煤的焦油产量从3.6％增加到9.0％，而新疆煤的煤炭分别在加入Mo-and Fe基催化剂后增加了8.1％至11.4％和10.9％ 。基于GC / MS分析，发现羟基苯含量显着降低，而当使用MO基催化剂时，萘甲苯含量升高。相反，通过加入Fe基催化剂来增强光芳烃的产生。相比之下，从新疆煤的生产显着抑制，但在加入催化剂后，脂肪族烃的含量显着增加。拉曼和FTIR分析结果表明，催化剂可以改善自由基与炭的反应，这对煤的解聚有益。

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  • 来源
    《RSC Advances》 |2015年第4期|共11页
  • 作者

    Liang Litong; Huang Wei; Gao Fuxing; Hao Xiaogang; Zhang Zhonglin; Zhang Qian; Guan Guoqing;

  • 作者单位

    Taiyuan Univ Technol Key Lab Coal Sci &

    Technol Minist Educ &

    Shanxi Prov Taiyuan 030024 Shanxi Peoples R China;

    Taiyuan Univ Technol Key Lab Coal Sci &

    Technol Minist Educ &

    Shanxi Prov Taiyuan 030024 Shanxi Peoples R China;

    Taiyuan Univ Technol Key Lab Coal Sci &

    Technol Minist Educ &

    Shanxi Prov Taiyuan 030024 Shanxi Peoples R China;

    Taiyuan Univ Technol Dept Chem Engn Taiyuan 030024 Shanxi Peoples R China;

    Taiyuan Univ Technol Dept Chem Engn Taiyuan 030024 Shanxi Peoples R China;

    Taiyuan Univ Technol Key Lab Coal Sci &

    Technol Minist Educ &

    Shanxi Prov Taiyuan 030024 Shanxi Peoples R China;

    Hirosaki Univ North Japan Res Inst Sustainable Energy Aomori 0300813 Japan;

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  • 正文语种 eng
  • 中图分类 化学;
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