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工业废碱液催化煤焦加压水蒸气气化反应的研究

王会芳 李鹏 祖静茹 李克忠

王会芳, 李鹏, 祖静茹, 李克忠. 工业废碱液催化煤焦加压水蒸气气化反应的研究[J]. 燃料化学学报, 2021, 49(2): 145-150. doi: 10.19906/j.cnki.JFCT.2021010
引用本文: 王会芳, 李鹏, 祖静茹, 李克忠. 工业废碱液催化煤焦加压水蒸气气化反应的研究[J]. 燃料化学学报, 2021, 49(2): 145-150. doi: 10.19906/j.cnki.JFCT.2021010
WANG Hui-fang, LI Peng, ZU Jing-ru, LI Ke-zhong. Catalytic effects of industrial waste alkali liquor in pressurized steam gasification of coal char[J]. Journal of Fuel Chemistry and Technology, 2021, 49(2): 145-150. doi: 10.19906/j.cnki.JFCT.2021010
Citation: WANG Hui-fang, LI Peng, ZU Jing-ru, LI Ke-zhong. Catalytic effects of industrial waste alkali liquor in pressurized steam gasification of coal char[J]. Journal of Fuel Chemistry and Technology, 2021, 49(2): 145-150. doi: 10.19906/j.cnki.JFCT.2021010

工业废碱液催化煤焦加压水蒸气气化反应的研究

doi: 10.19906/j.cnki.JFCT.2021010
基金项目: 国家科技支撑计划(2009BAA25B00),国家重点基础研究发展规划(973计划,2011CB201305)和国际科技合作专项(2011DFA60610)资助
详细信息
    通讯作者:

    Tel:0316-2595824,E-mail:nyyjy@enn.cn

  • 中图分类号: TQ541

Catalytic effects of industrial waste alkali liquor in pressurized steam gasification of coal char

Funds: The project was supported by National Science and Technology Support Program (2009BAA25B00), The National Basic Research Program of China (973 Program, 2011CB201305) and International Cooperation in Science and Technology Project (2011DFA60610)
More Information
    Corresponding author: Tel:0316-2595824,E-mail:nyyjy@enn.cn
  • 摘要: 为了研究工业废碱液对煤水蒸气反应的催化作用,选取内蒙古王家塔煤(WJT),负载造纸黑液(BL)进行高压水蒸气气化性能评价。分别考察了温度和负载量对催化活性的影响,并与分析纯碳酸钠(SC)催化活性进行对比。固定床小试评价结果表明,700−750 ℃,催化剂活性随负载量增加呈先增大后减小的趋势,BL最佳负载量为3%Na,并且催化活性优于SC催化剂;温度升高,催化活性更显著。采用N2吸附-脱附等温实验考察BL对煤焦比表面积和孔结构的影响,结果表明,随着BL负载量增加到3%,煤焦比表面积和孔容都增加,从而有利于提供更多的气化活性位点,提高煤焦反应活性;随着负载量的进一步增加,催化剂过量造成堆积堵孔,导致催化剂的比表面积和孔容降低,从而降低了气化反应速率。
  • 图  1  加压固定床评价装置流程示意图

    Figure  1.  Schematic diagram of pressurized fixed-bed reactor

    1: water pump;2: volume meter;3: pre-heater;4: char hopper;5: reactor;6: electric furnace;7: back pressure regulator;8: separate pot;9: flow meter

    图  2  温度对原煤半焦(RC)和3%Na-BL半焦碳转化率的影响

    Figure  2.  Effect of temperature on carbon conversion of coal char with and without BL

    图  3  BL与SC的催化性能对比

    Figure  3.  Comparison of catalytic effect of BL with SC

    图  4  催化剂负载量对碳转化率的影响

    Figure  4.  Effect of catalyst loading on carbon conversion

    图  5  催化剂负载量对甲烷收率的影响

    Figure  5.  Effect of catalyst loading on CH4 yield

    图  6  不同BL负载量煤焦的等温吸附-脱附曲线

    Figure  6.  Adsorption-desorption isotherm of chars with different BL loadings

    图  7  不同BL负载量煤焦的孔径分布

    Figure  7.  Distribution of pore size of char with different BL loadings

    表  1  王家塔煤的工业分析和元素分析

    Table  1.   Proximate and ultimate analyses of WJT coal

    Proximate analysis wd/% Ultimate analysis wd/%
    A V FC C H O N S
    4.77 33.75 61.47 75.34 4.10 14.56 0.87 0.36
    下载: 导出CSV

    表  2  不同负载量BL煤焦的比表面积和孔容分布

    Table  2.   Specific surface area and pore volume of char with different BL loadings

    Samples BL% Surface area /(m2·g−1) Pore volume /(cm3·g−1) Average pore diameter /nm
    BET surface t-plot micropore t-plot external total pore volume t-plot micropore
    0 9.7769 0.0816 9.6953 0.025624 −0.000077 10.48366
    2 13.7624 1.8739 11.8885 0.033134 0.000819 9.63037
    3 14.7986 1.1599 13.6387 0.033360 0.000433 9.01696
    5 12.7637 0.3826 12.3811 0.031556 0.000046 9.88931
    下载: 导出CSV
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  • 收稿日期:  2020-10-28
  • 修回日期:  2020-11-19
  • 刊出日期:  2021-02-08

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