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首页> 外文期刊>ISIJ international >Effect of the Moisture Content of Coal Blends on Coke Structure and its Apparent Gasification Kinetics with CO_2
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Effect of the Moisture Content of Coal Blends on Coke Structure and its Apparent Gasification Kinetics with CO_2

机译：煤混合水分含量对焦炭结构及其表观气化动力学的影响与CO_2

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摘要

In this work, the influences of moisture content of coal on the structure and reactivity of cokes were investigated by blending different proportion of dry coal (with < 2 wt.% moisture) and wet coal (with ～10 wt.% moisture) and analyzing the gasification of the produced coke. The results indicated the coke formed from dry coal has the highest specific surface area and thinner pore walls. The results of isothermal ther-mogravimetric method show that the order of gasification reactivity of bulk coke from different proportion of wet coal is: 0 wt.% wet coal, 100 wt.% wet coal, 60 wt.% wet coal and 30 wt.% wet coal. In order to eliminate the influence of diffusion on the gasification reaction, coke with a particle size fraction of less than 48 μm was used for the non-isothermal gasification reaction. Results show that the gasification reaction curves of four samples are similar in the gasification process. It was concluded from kinetics analysis that the volume reaction model is well fitted with the experimental data. The activation energy with the volume reaction model is 191.9, 203.1, 190.1, and 190.8 kJ/mol. It was concluded that the moisture content of coal has little effect on the activation energy of the gasification, while the coke gasification kinetics is mainly determined by the coke pore structures which influence reaction surface.
机译：在这项工作中，通过混合不同比例的干煤（用2重量％）和湿煤（用〜10重量％）来研究煤炭水分含量对焦化结构和反应性的影响（用〜10重量％）和分析生产的焦炭的气化。结果表明，由干煤形成的焦炭具有最高的比表面积和较薄的孔壁。等温Ther-MoGravimetric方法的结果表明，来自不同比例的湿煤的散装焦炭的气化反应性为：0重量％湿煤，100重量％湿煤，60重量％湿煤和30重量％。 ％湿煤。为了消除扩散对气化反应的影响，使用粒度小于48μm的焦炭用于非等温气化反应。结果表明，气化过程中四个样品的气化反应曲线类似。从动力学分析中得出结论，体积反应模型很好地配备了实验数据。具有体积反应模型的激活能量为191.9,203.1,190.1和190.8 kJ / mol。得出结论是，煤的水分含量对气化的激活能量影响不大，而焦炭气化动力学主要由影响反应表面的焦孔结构决定。

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  • 来源
    《ISIJ international》 |2020年第9期|1909-1917|共9页
  • 作者

    Ziming WANG; Kejiang Ll; Jianliang ZHANG; Xuehong ZHANG; Gaifeng XUE; Xitao CHEN; Minmin SUN; Chunhe JIANG;

  • 作者单位

    School of Metallurgical and Ecological Engineering University of Science and Technology Beijing No. 30 Xueyuan Rd Haidian District Beijing 100083 P.R. China;

    School of Metallurgical and Ecological Engineering University of Science and Technology Beijing No. 30 Xueyuan Rd Haidian District Beijing 100083 P.R. China;

    School of Metallurgical and Ecological Engineering University of Science and Technology Beijing No. 30 Xueyuan Rd Haidian District Beijing 100083 P.R. China School of Chemical Engineering The University of Queensland St Lucia QLD 4072 Australia;

    Science&Research Institude of BAOWU Wuhan 430080 P.R. China;

    Science&Research Institude of BAOWU Wuhan 430080 P.R. China;

    Science&Research Institude of BAOWU Wuhan 430080 P.R. China;

    School of Metallurgical and Ecological Engineering University of Science and Technology Beijing No. 30 Xueyuan Rd Haidian District Beijing 100083 P.R. China;

    School of Metallurgical and Ecological Engineering University of Science and Technology Beijing No. 30 Xueyuan Rd Haidian District Beijing 100083 P.R. China;

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

    coke gasification; coal moisture control; pore structure; kinetics;

    机译：焦化;煤水保湿;孔结构;动力学;

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