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首页> 外文期刊>Waste management & research >Co-pyrolysis behaviour and kinetic of two typical solid wastes in China and characterisation of activated carbon prepared from pyrolytic char
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Co-pyrolysis behaviour and kinetic of two typical solid wastes in China and characterisation of activated carbon prepared from pyrolytic char

机译：中国两种典型固体废物的共热解行为和动力学以及热解炭制备的活性炭的表征

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摘要

This is the first study on the co-pyrolysis of spent substrate of Pleurotus ostreatus and coal tar pitch, and the activated carbon prepared from the pyrolytic char. Thermogravimetry (TG) analysis was carried out taking spent substrate, coal tar pitch and spent substrate-coal tar pitch mixture. The activation energies of pyrolysis reactions were obtained via the Flynn-Wall-Ozawa and Kissinger-Akahira-Sunose methods. The kinetic models were determined by the master-plots method. The activated carbons were characterised by N_2-adsorption, Fourier transform infrared spectroscopy and X-ray diffraction. Experimental results demonstrated a synergistic effect happened during co-pyrolysis, which was characterised by a decreased maximum decomposition rate and an enhanced char yield. The average activation energies of the pyrolysis reactions of spent substrate, coal tar pitch and the mixture were 115.94, 72.92 and 94.38 kJ mol~(-1) for the Flynn-Wall-Ozawa method, and 112.17, 65.62 and 89.91 kJ mol~(-1) for the Kissinger-Akahira-Sunose method. The reaction model functions were f(α)=(1-α)~(3.42), (1-α)~(1.72) and (1-α)~(3.07) for spent substrate, coal tar pitch and the mixture, respectively. The mixture char-derived activated carbon had a Brunauer-Emmett-Teller surface area up to 1337 m~2 g~(-1) and a total pore volume of 0.680 cm~3 g~(-1). Mixing spent substrate with coal tar pitch led to the creation of more micropores and a higher surface area compared with the single spent substrate and coal tar pitch char. Also, the mixture char-derived activated carbon had a higher proportion of aromatic stacking. This study provides a reference for the utilisation of spent substrate and coal tar pitch via co-pyrolysis, and their pyrolytic char as a promising precursor of activated carbon.
机译：这是首次研究平菇废底物与煤焦油沥青以及由热解炭制备的活性炭的共热解。进行热重分析（TG），分析废底物，煤焦油沥青和废底物-煤焦油沥青混合物。热解反应的活化能通过Flynn-Wall-Ozawa和Kissinger-Akahira-Sunose方法获得。通过主图法确定动力学模型。通过N_2-吸附，傅立叶变换红外光谱和X射线衍射对活性炭进行表征。实验结果表明，共热解过程中产生了协同效应，其特征是最大分解速率降低，焦炭产率提高。 Flynn-Wall-Ozawa方法的废底物，煤焦油沥青和混合物的热解反应的平均活化能为115.94、72.92和94.38 kJ mol〜（-1），分别为112.17、65.62和89.91 kJ mol〜（ -1）用于Kissinger-Akahira-Sunose方法。废底物，煤焦油沥青和混合物的反应模型函数分别为f（α）=（1-α）〜（3.42），（1-α）〜（1.72）和（1-α）〜（3.07），分别。混合炭来源的活性炭具有高达1337 m〜2 g〜（-1）的Brunauer-Emmett-Teller表面积，总孔体积为0.680 cm〜3 g〜（-1）。与单一废基质和煤焦油沥青炭相比，废基质与煤焦油沥青的混合导致产生更多的微孔和更大的表面积。而且，混合炭来源的活性炭具有较高比例的芳族堆积。这项研究为通过共热解利用废底物和煤焦油沥青及其热解炭作为活性炭的前体提供了参考。

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  • 来源
    《Waste management & research》 |2014年第11期|1123-1133|共11页
  • 作者

    Yuhui Ma; Ruxuan Niu; Xiaona Wang; Qunhui Wang; Xiaoqiang Wang; Xiaohong Sun;

  • 作者单位

    Department of Civil and Environment Engineering, University of Science and Technology Beijing, Beijing, China;

    Department of Civil and Environment Engineering, University of Science and Technology Beijing, Beijing, China;

    Department of Civil and Environment Engineering, University of Science and Technology Beijing, Beijing, China;

    Department of Civil and Environment Engineering, University of Science and Technology Beijing, Beijing 100083, China;

    National Engineering Laboratory for Biomass Power Generation Equipment, North China Electric Power University, Beijing, China;

    Beijing Agricultural Biotechnology Centre, Beijing Academy of Agriculture and Forestry Sciences, Beijing, 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

    Co-pyrolysis; spent substrate; coal tar pitch; thermogravimetric analysis; pyrolysis kinetics; activated carbon;

    机译：共热解;用过的基材煤焦油沥青热重分析;热解动力学活性炭;

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