Biomass pyrolysis: kinetic modelling and experimental validation under high temperature and flash heating rate conditions.
Biomass pyrolysis: kinetic modelling and experimental validation under high temperature and flash heating rate conditions.
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DOI：
10.1016/j.jaap.2008.11.034
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发表时间：
2009-05
影响因子：
6
通讯作者：
C. Dupont;Li Chen;Julien Cances;J. Commandré;A. Cuoci;S. Pierucci;E. Ranzi
中科院分区：
文献类型：
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作者：
C. Dupont;Li Chen;Julien Cances;J. Commandré;A. Cuoci;S. Pierucci;E. Ranzi
这项工作分析和讨论了生物质热解的一般特征，无论是在一组新的实验的基础上，并通过使用一个详细的动力学模型的生物质脱挥发分，也包括连续的气相反应的释放物种，因此能够预测的主要气体成分。在实验室规模的夹带流反应器（EFR）中进行实验，以研究高温（1073- 1273 K）和高加热通量（10- 100 kWm −2）下的生物质热解。颗粒尺寸和温度的影响已被测试与固体在反应器中的停留时间。颗粒尺寸是最关键的参数。在0.3m的反应器长度之后，0.4mm颗粒的热解在该温度范围下几乎完成，具有超过75wt%的气体释放，而由于内部传热限制，对于高达1.1mm的较大颗粒，转化仍在进行中，直到反应器结束。该模型和实验数据之间的初步比较是令人鼓舞的，并显示该模型的能力，以有助于更好地设计和理解的生物质热解过程中的温度和热通量通常发现在工业气化炉的苛刻条件下。
This work analyzes and discusses the general features of biomass pyrolysis, both on the basis of a new set of experiments and by using a detailed kinetic model of biomass devolatilization that includes also successive gas phase reactions of the released species and is therefore able to predict the main gases composition. Experiments are performed in a lab-scale Entrained Flow Reactor (EFR) to investigate biomass pyrolysis under high temperatures (1073–1273K) and high heating fluxes (10–100kWm−2). The influence of particle dimensions and temperature has been tested versus solid residence time in the reactor. The particle size appeared as the most crucial parameter. The pyrolysis of 0.4mm particles is nearly finished under this range of temperatures after a reactor length of 0.3m, with more than 75wt% of gas release, whereas the conversion is still under evolution until the end of the reactor for larger particles up to 1.1mm, due to internal heat transfer limitations. The preliminary comparisons between the model and the experimental data are encouraging and show the ability of this model to contribute to a better design and understanding of biomass pyrolysis process under severe conditions of temperature and heating fluxes typically found in industrial gasifiers.