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首页> 外文期刊>Journal of Analytical & Applied Pyrolysis >Effects of torrefaction on the formation and distribution of dioxins during wood and PVC pyrolysis: An experimental and mechanistic study
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Effects of torrefaction on the formation and distribution of dioxins during wood and PVC pyrolysis: An experimental and mechanistic study

机译：Torrefaction对木材和PVC热解期间二恶英形成和分布的影响：实验与机械研究

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摘要

Dioxins reduction is crucial for the pyrolysis of municipal solid waste (MSW). In this work, torrefaction was employed as a pretreatment for inhibiting the synthesis of dioxins. A mixture of poplar and polyvinyl chloride (PVC) was used as the model MSW and provided the polycyclic aromatic hydrocarbon (PAH) source and chlorine sources, respectively. A torrefaction-pyrolysis experiment was performed in a tubular furnace system, and the weight loss and chlorine release (mainly in the form of hydrogen chloride) were evaluated. The dioxins distribution in the products were detected by high-resolution mass spectrometry (HR-MS). Thermogravimetric Fourier transform infrared spectroscopy (TG-FTIR) was employed to clarify the chlorination of PAHs. The results showed that torrefaction could reduce 98.63 % of the total amount of dioxins and reduce 99.09 % of the toxic equivalent of volatile dioxins. Since torrefaction cut the Cl participation of MSW (from PVC) by 86.94 %, the overall reaction process was simplified, and the temperature of the maximum conversion rate was increased. In addition, the analysis of the functional groups indicated that most dioxins during pyrolysis was synthesized from 200 degrees C to 400 degrees C. This research demonstrated a significant emission reduction, which effected by torrefaction, and provided a new idea for dioxins clean pyrolysis of MSW.
机译：二恶英还原对于城市固体废物（MSW）的热解是至关重要的。在这项工作中，使用Torrefaction作为抑制二恶英合成的预处理。使用杨树和聚氯乙烯（PVC）的混合物作为模型MSW，并分别提供多环芳烃（PAH）源和氯源。在管状炉系统中进行烘焙 - 热解实验，评价重量损失和氯释放（主要以氯化氢的形式）。通过高分辨率质谱（HR-MS）检测产物中的二恶英分布。采用热重傅里叶变换红外光谱（TG-FTIR）来阐明PAHS的氯化。结果表明，烘焙率可以减少二恶英总量的98.63％，减少99.09％的挥发性二恶英的毒性等同物。由于Torrefaction将MSW（从PVC）的CL参与减少86.94％，因此简化了总反应过程，并且最大转化率的温度增加。此外，官能团的分析表明热解期间的大多数二恶英由200摄氏度合成至400℃。该研究表明，通过烘焙的减少减少，并为Dioxins的新思想进行了新的MSW 。

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  • 来源
    《Journal of Analytical & Applied Pyrolysis》 |2021年第8期|105240.1-105240.9|共9页
  • 作者

    Han Zixi; Li Jian; Gu Tianbao; Yang Ruilei; Fu Zhufu; Yan Beibei; Chen Guanyi;

  • 作者单位

    Tianjin Univ Key Lab Engines Sch Environm Sci & Engn Tianjin 300072 Peoples R China;

    Tianjin Univ Key Lab Engines Sch Environm Sci & Engn Tianjin 300072 Peoples R China;

    Aalborg Univ Dept Energy Technol DK-9220 Aalborg Denmark;

    Tianjin Univ Key Lab Engines Sch Environm Sci & Engn Tianjin 300072 Peoples R China;

    Tianjin Univ Key Lab Engines Sch Environm Sci & Engn Tianjin 300072 Peoples R China;

    Tianjin Univ Key Lab Engines Sch Environm Sci & Engn Tianjin 300072 Peoples R China|Tianjin Univ China Petr & Chem Ind Federat Key Lab Biomass Based Oil & Gas Tianjin 300072 Peoples R China;

    Tibet Univ Sch Sci Lhasa 850012 Peoples R China|Tianjin Univ China Petr & Chem Ind Federat Key Lab Biomass Based Oil & Gas Tianjin 300072 Peoples 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

    MSW; Torrefaction; Pyrolysis; Dioxins; Chlorine;

    机译：MSW;烘焙;热解;二恶英;氯;

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