Influence of the heating rate on the thermodegradation during the mild pyrolysis of the wood
Influence of the heating rate on the thermodegradation during the mild pyrolysis of the wood
复制标题
DOI：
10.1080/17480272.2022.2039289
复制
发表时间：
2022-02
影响因子：
2.2
通讯作者：
A. Pétrissans;Yu-Ying Lin;T. N. Nguyen;Baptiste Colin;R. Quirino;Priscila Rios-Teixeira;Wei-hsin Chen;M. Pétrissans
中科院分区：
文献类型：
--
作者：
A. Pétrissans;Yu-Ying Lin;T. N. Nguyen;Baptiste Colin;R. Quirino;Priscila Rios-Teixeira;Wei-hsin Chen;M. Pétrissans
摘要：木材是一种可再生、可持续的材料，但由于其耐久性差和尺寸不稳定，其原材料利用率受到限制。为了改善缺点，在无氧气氛中在 200-300°C 的温度范围内温和热解已被使用多年。然而，在此过程的初始阶段仍然存在严重缺乏知识的情况。本研究的目的是研究加热速率对木材热降解途径的影响以及该参数对赋予性能的影响。加热速率影响过程的总持续时间，并且与加热器的功率容量密切相关。热降解实验在两种不同的规模下进行。对木粉的热重分析可以更好地了解生物质聚合物的降解方案。在木板上的半工业中试规模系统中进行的实验可以将过程转变为真实条件。与行业惯例类似，加热速率在 0.2 至 1.0°C min−1 之间变化。结果表明降解动力学存在显着差异。已经测试了一种数值工具来预测热改性过程的进展。这些观察结果对工业应用很有意义。
ABSTRACT Wood constitutes a renewable and sustainable material, which raw utilization is limited because of the weak durability and dimensional instability. To improve shortcomings, a mild pyrolysis in the temperature range 200–300°C in oxygen-free atmosphere has been used for years. However, a significant lack of knowledge persists in the initial stage of the process. The purpose of this study is to investigate the influence of the heating rate on the wood thermodegradation pathway and the impact of this parameter on the conferred properties. The heating rate influences the total duration of the process and is strongly related to the power capacity of the heater. Experiments of thermal degradation were carried out at two different scales. Thermogravimetric analysis on wood powder allows to better understand the degradation scheme of biomass polymers. Experiments in a semi-industrial pilot-scale system on wood boards allow to transpose the process towards real conditions. Similar to industry practices, the heating rate has been varied between 0.2 and 1.0°C min−1. The results reveal noticeable differences in the degradation kinetics. A numerical tool has been tested to predict the advancement of the thermo-modification process. The observations are of interest for industrial applications.