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煤快速热解过程碱及碱土金属释放特性及焦理化结构演变研究

夏纬栋 余俊钦 丁路 龚岩 于广锁

夏纬栋, 余俊钦, 丁路, 龚岩, 于广锁. 煤快速热解过程碱及碱土金属释放特性及焦理化结构演变研究[J]. 燃料化学学报(中英文), 2022, 50(3): 268-274. doi: 10.1016/S1872-5813(21)60155-X
引用本文: 夏纬栋, 余俊钦, 丁路, 龚岩, 于广锁. 煤快速热解过程碱及碱土金属释放特性及焦理化结构演变研究[J]. 燃料化学学报(中英文), 2022, 50(3): 268-274. doi: 10.1016/S1872-5813(21)60155-X
XIA Wei-dong, YU Jun-qin, DING Lu, GONG Yan, YU Guang-suo. Release characteristics of AAEMs and physicochemical structural evolution of char during rapid coal pyrolysis[J]. Journal of Fuel Chemistry and Technology, 2022, 50(3): 268-274. doi: 10.1016/S1872-5813(21)60155-X
Citation: XIA Wei-dong, YU Jun-qin, DING Lu, GONG Yan, YU Guang-suo. Release characteristics of AAEMs and physicochemical structural evolution of char during rapid coal pyrolysis[J]. Journal of Fuel Chemistry and Technology, 2022, 50(3): 268-274. doi: 10.1016/S1872-5813(21)60155-X

煤快速热解过程碱及碱土金属释放特性及焦理化结构演变研究

doi: 10.1016/S1872-5813(21)60155-X
基金项目: 国家重点研发计划政府间国际科技创新合作重点专项(2021YFE0108900),国家自然科学基金(21878093),上海市科委“一带一路”国际科技合作项目-“一带一路”青年科学家交流项目(20230742400),上海市浦江人才计划(20PJ1402800)资助
详细信息
    作者简介:

    夏纬栋:1415174933@qq.com

    通讯作者:

    Tel:021-64252974,Fax:021-64251312,E-mail:dinglu@ecust.edu.cn

    gsyu@ecust.edu.cn

  • 中图分类号: TQ546

Release characteristics of AAEMs and physicochemical structural evolution of char during rapid coal pyrolysis

Funds: The project was supported by National Key Research and development (R&D) Program and International Science and Technology Innovation Project between Governments (2021YFE0108900), National Natural Science Foundation of China (21878093), Belt & Road Young Scientist Exchange Project Supported by Fund of Shanghai Science and Technology Committee (20230742400), and Pujiang Talent Program Supported by Fund of Shanghai Science and Technology Committee (20PJ1402800)
  • 摘要: 本研究基于高频炉反应器开展准东煤的快速热解实验,探究碱及碱土金属(AAEMs)的释放特性及其与煤焦理化性质演变的关联。热解停留时间、气氛是影响AAEMs迁移特性及煤焦理化性质演变的重要过程参数。研究表明,AAEMs的释放率随热解停留时间的延长而增大,Na、Mg和Ca的最大释放率分别为61.05%、64.47%、44.01%。CO2气氛能显著提高煤热解过程中AAEMs的释放率,CO2对Na释放的促进作用主要发生在快速热解初期,而对Mg和Ca释放的促进作用主要表现在快速热解中后期。CO2气氛促进挥发分释放,加快含氧官能团及脂肪族官能团分解,促进煤焦表面裂纹形成,从而促进煤快速热解过程煤中AAEMs的释放。
  • FIG. 1381.  FIG. 1381.

    FIG. 1381.  FIG. 1381.

    图  1  高频炉示意图

    Figure  1  Schematic diagram of high frequency furnace

    图  2  煤焦的热解特性

    Figure  2  Pyrolysis characteristics of coal char

    图  3  煤焦的拉曼光谱谱图

    Figure  3  Raman spectra of coal char

    (a): Original Raman spectrum; (b): Fitting Raman spectrum; (c): ID1/IG

    图  4  煤焦的红外光谱谱图

    Figure  4  Infrared spectra of coal char

    图  5  快速热解焦的扫描电镜照片

    Figure  5  Scanning electron microscope images of rapid gasification char

    图  6  N2及CO2气氛中碱及碱土金属释放特性

    Figure  6  Release characteristics of AAEMs in N2 and CO2 atmosphere

    表  1  煤样的工业分析及元素分析

    Table  1  Proximate analysis and ultimate analysis of coal sample

    SampleProximate analysis wad/%Ultimate analysis wad/%
    VFCAMNHCSO*
    ZD27.5459.765.497.210.663.2769.050.6313.69
    ad: air dried basis; *: calculation by subtraction
    下载: 导出CSV

    表  2  灰分分析

    Table  2  Ash analysis of coal sample

    SampleAsh composition/%
    SiO2Al2O3K2ONa2OCaOFe2O3MgOothers
    ZD10.868.410.118.3121.599.2813.5527.89
    others: other grey components in grey samples such as SO3, P2O5, TiO2 etc
    下载: 导出CSV

    表  3  900 ℃下煤颗粒在不同长度加热管内的停留时间

    Table  3  Residence time of coal particles in heating tubes of different lengths at 900 ℃

    AtmosphereResidence time of different isothermal zone t/ms
    40 mm80 mm120 mm150 mm
    N2164328492615
    CO2159317475594
    下载: 导出CSV
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出版历程
  • 收稿日期:  2021-06-30
  • 修回日期:  2021-08-23
  • 网络出版日期:  2021-09-19
  • 刊出日期:  2022-03-28

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