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首页> 外文期刊>Fuel >Effect of temperature and hydrogen on product distribution and evolution of char structure during pyrolysis of bituminous coal in a drop tube furnace
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Effect of temperature and hydrogen on product distribution and evolution of char structure during pyrolysis of bituminous coal in a drop tube furnace

机译：温度与氢对滴管炉热解烟煤热解过程中的产物分布及炭结构演化的影响

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摘要

This paper aims to investigate the hydropyrolysis behavior of pulverized bituminous coal in a drop-tube furnace (DTF) with a temperature of 800-1000 degrees C. The effects of temperature and hydrogen on the compositions (gases and tar) and the structure of products (char) were investigated. Hydropyrolysis between 800 and 1000 degrees C resulted in a high yield of methane, and tar production decreased with increasing temperature. Besides, the light components of tar, especially the naphthalene, were significantly increased with hydrogen. The methane yield firstly increased to a peak value of 72.83 ml/g(air-dried coal) at 900 degrees C and then decreased with increasing temperature during hydropyrolysis. Hydrogen significant improved the yield of gaseous hydrocarbon (C2H2, C2H4, and C2H6) when the temperature below 900 degrees C, while rarely change that at a higher temperature. At the temperature above 900 degrees C, the content of graphite in the hydropyrolysis char was lower than that of pyrolysis char in nitrogen. The graphite contents in the char decreased to a minimum at 950 degrees C and then gradually increased with increasing temperature. The char from hydropyrolysis has a higher condensation degree structure and higher saturation. The small aromatic molecules transformed into large aromatic molecules with increasing temperature under both pyrolysis and hydropyrolysis.
机译：本文旨在探讨碎沥青煤（DTF）中粉碎烟煤（DTF）的水解分解行为，温度为800-1000℃。温度和氢气对组合物（气体和焦油）的影响和产品结构（char）被调查了。在800和1000℃之间的氢化氢化产生高产率的甲烷，并且随着温度的增加而降低焦油。此外，用氢气显着增加焦油，尤其是萘的光分量。甲烷产率首先在900℃下增加至72.83ml / g（空气干煤）的峰值，然后随着氢过滤过程中的温度升高而降低。当温度低于900℃的温度时，氢气显着提高了气态烃（C 2 H 2，C 2 H 4和C 2 H6）的产率，同时很少改变在较高温度下。在900摄氏度高于900℃的温度下，氢过滤炭中石墨含量低于氮气中热解焦炭的含量。炭中的石墨内容物在950℃下降至最小，然后随着温度的增加而逐渐增加。来自氢化氢的炭具有更高的缩合度结构和更高的饱和度。小芳族分子转化为大量芳族分子，随着热解和氢化溶解的温度越来越大。

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  • 来源
    《Fuel》 |2020年第may1期|117078.1-117078.13|共13页
  • 作者

    Gao Rui; Dou Benhao; Chang Qinghua; Xu Jianliang; Dai Zhenghua; Yu Guangsuo; Wang Fuchen;

  • 作者单位

    East China Univ Sci & Technol Shanghai Engn Res Ctr Coal Gasificat Shanghai 200237 Peoples R China;

    East China Univ Sci & Technol Shanghai Engn Res Ctr Coal Gasificat Shanghai 200237 Peoples R China;

    East China Univ Sci & Technol Shanghai Engn Res Ctr Coal Gasificat Shanghai 200237 Peoples R China;

    East China Univ Sci & Technol Shanghai Engn Res Ctr Coal Gasificat Shanghai 200237 Peoples R China;

    East China Univ Sci & Technol Shanghai Engn Res Ctr Coal Gasificat Shanghai 200237 Peoples R China;

    East China Univ Sci & Technol Shanghai Engn Res Ctr Coal Gasificat Shanghai 200237 Peoples R China;

    East China Univ Sci & Technol Shanghai Engn Res Ctr Coal Gasificat Shanghai 200237 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Hydropyrolysis; DTF; Tar composition; Char structure evolution;

    机译：氢溶解;DTF;焦油组成;炭结构演变;

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