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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. 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. doi: 10.1016/S1872-5813(21)60155-X
XIA Wei-dong, YU Jun-qin, DING Lu, GONG Yan, YU Guang-suo. Study on release characteristics of AAEMs and physicochemical structural evolution of char during coal rapid pyrolysis[J]. Journal of Fuel Chemistry and Technology. doi: 10.1016/S1872-5813(21)60155-X
Citation: XIA Wei-dong, YU Jun-qin, DING Lu, GONG Yan, YU Guang-suo. Study on release characteristics of AAEMs and physicochemical structural evolution of char during coal rapid pyrolysis[J]. Journal of Fuel Chemistry and Technology. 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: 国家自然科学基金项目(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资助项目(20PJ1402800)
详细信息
    作者简介:

    夏纬栋:1415174933@qq.com

    通讯作者:

    dinglu@ecust.edu.cn(丁路)

    于广锁,丁路。Tel:021-64252974。Fax:021-64251312。E-mail:gsyu@ecust.edu.cn(于广锁)

  • 中图分类号: TQ546

Study on release characteristics of AAEMs and physicochemical structural evolution of char during coal rapid pyrolysis

Funds: This work was supported by 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: 本文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增加而增大,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。
  • 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  Gasification characteristics of coal char

    图  3  煤焦的拉曼光谱

    Figure  3  Raman spectroscopy of coal char

    图  4  煤焦的红外光谱

    Figure  4  Infrared spectrogram of coal char

    图  5  快速热解焦的扫描电镜图

    Figure  5  Scanning electron microscope image of fast 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  煤样工业分析及元素分析

    Table  1  The proximate analysis and ultimate analysis of coal sample

    SampleProximate analysis (ad, %)Ultimate analysis (ad, %)
    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  The ash analysis of coal sample

    SampleAsh composition/%
    SiO2Al2O3K2ONa2OCaOFe2O3MgOOthers
    ZD10.868.410.118.3121.599.2813.5527.89
    others:灰样中其它灰成分, 如SO3、P2O5、TiO2
    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

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