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首页> 外文期刊>Energy Conversion & Management >Comparison of wood pyrolysis kinetic data derived from thermogravimetric experiments by model-fitting and model-free methods
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Comparison of wood pyrolysis kinetic data derived from thermogravimetric experiments by model-fitting and model-free methods

机译：用模型配合和无模型方法比较热分解实验的木质热解动力学数据

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摘要

The pyrolysis kinetics of beech wood was analyzed using model-free and model-fitting methods. Experimental measurements of the pyrolysis process were conducted in two thermogravimetric analyzers (TGA), a TG 209/2/F from Netzsch and a TGA Q500 from TA Instruments, which were found to have a similar precision in the establishment of the present heating rate. Two experimental procedures were employed: (i) introducing samples which were pre-dried externally before the experiments were executed and (ii) internal (in situ) drying of the samples in the TGA via a special temperature program below 150 degrees C which preceded the pyrolysis process.The kinetic parameters were derived (i) using several model-free methods, namely Kissinger method, iso-conversional methods, a simplified Distributed Activation Energy Model (sDAEM) and, (ii) using a model-fitting method via a five-step reaction model which calculates the differential thermogravimetric (DTG) curves at different heating rates; the calculated DTG curves were further analyzed by Kissinger's method to obtain overall kinetic data.The kinetic parameters were found to be different in the two experimental procedures. Also, they turned out different when the assumed end temperature of the pyrolysis process was varied. This is because the pyrolysis of slowly charring solid residues becomes more important with increasing temperature and finally overruns the release of volatiles from the wood samples. For the same experimental procedure and for sufficiently low end temperatures, corresponding to a degree of conversion less than 85%, model-free and model-fitting methods resulted in similar kinetic parameters.
机译：使用无模型和拟合方法分析了山毛榉木木材的热解动力学。热解过程的实验测量在两个热量分析仪（TGA）中进行，来自Netzsch的TG 209/2 / F，来自TA仪器的TGA Q500，在该加热速率的建立中被发现具有类似的精度。采用两种实验程序：（i）在执行实验之前，在执行实验之前在外部预先干燥的样品，并通过特殊的温度计划在150摄氏度以下的特殊温度计划中进行（原位）在TGA中的样品干燥。热解过程。使用多种无意义的方法，即kissinger方法，ISO-交易方法，简化分布式激活能量模型（SDAEM）和（ii）通过五个模型拟合方法来源（i）衍生动力学参数。 -Step反应模型，计算不同加热速率的差分热重度（DTG）曲线;通过基辛格的方法进一步分析计算的DTG曲线，以获得整体动力学数据。发现动力学参数在两种实验程序中有所不同。此外，当多种热解过程的假定最终温度变化时，它们结果不同。这是因为缓慢炭化固体残留物的热解变得更加重要，随着温度的增加，最终超越从木样品中释放挥发物。对于相同的实验程序和对于足够低的最终温度，对应于少于85％的转化程度，无模型和模型配合方法导致类似的动力学参数。

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  • 来源
    《Energy Conversion & Management》 |2020年第5期|112818.1-112818.12|共12页
  • 作者

    Soria-Verdugo Antonio; Morgano Marco Tomasi; Maetzing Hartmut; Goos Elke; Leibold Hans; Merz Daniela; Riedel Uwe; Stapf Dieter;

  • 作者单位

    Carlos III Univ Madrid Spain Thermal & Fluids Engn Dept Energy Syst Engn Grp Avda Univ 30 Leganes 28911 Spain;

    ARCUS Greencycling Technol GmbH Leonberger Str 30 D-71638 Ludwigsburg Germany;

    Karlsruhe Inst Technol KIT Inst Tech Chem ITC Hermann von Helmholtz Pl 1 Eggenstein Leopoldshafen 76344 Germany;

    Deutsch Zentrum Luft & Raumfahrt eV Inst Combust Technol DLR German Aerosp Ctr Pfaffenwaldring 38-40 Stuttgart 70569 Germany;

    Karlsruhe Inst Technol KIT Inst Tech Chem ITC Hermann von Helmholtz Pl 1 Eggenstein Leopoldshafen 76344 Germany;

    Karlsruhe Inst Technol KIT Inst Tech Chem ITC Hermann von Helmholtz Pl 1 Eggenstein Leopoldshafen 76344 Germany;

    Deutsch Zentrum Luft & Raumfahrt eV Inst Combust Technol DLR German Aerosp Ctr Pfaffenwaldring 38-40 Stuttgart 70569 Germany;

    Karlsruhe Inst Technol KIT Inst Tech Chem ITC Hermann von Helmholtz Pl 1 Eggenstein Leopoldshafen 76344 Germany;

  • 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

    Biomass pyrolysis; Pyrolysis kinetics; Model-free methods; Model-fitting methods;

    机译：生物质热解;热解动力学;无模型方法;模型配件方法;

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