Biomass pyrolysis kinetics in a fluidized bed reactor: Measurements and plausibility verification for reaction conditions - Supplementary data set

A small-scale fluidized bed reactor is used to study pyrolysis kinetics of pulverized beech wood particles. The fluidized bed reactor realizes high particle heating rates (104 K/s) and high temperatures (up to 1473 K) to approximate flame-equivalent conditions of pulverized fuel boilers. Mass release rate is calculated based on time-dependent concentration profiles of 22 gas species measured with ex-situ FTIR gas analysis for batch-wise injected fuel samples. To verify if the determination of kinetic data from experiments is taking place in the reaction kinetic controlled regime, the Global Reaction Model (GRM) combined with an Arrhenius approach is used. A comparison with literature data shows that kinetic data can be measured reliable in the temperature range from 523 to 973 K. The obtained data sets are unique regarding their time resolution and number of investigated gas species, which promotes them to be used as validation data for network models in the given temperature range. For higher temperatures, the pyrolysis reaction is distorted by the insufficient gas transport to the ex-situ measurement device.本数据集依托小型流化床反应器开展山毛榉木粉颗粒的热解动力学研究。该反应器可实现104 K/s的高颗粒升温速率与最高1473 K的高温环境，用以模拟粉煤锅炉的火焰等效工况。针对分批注入的燃料样品，本研究通过异位傅里叶变换红外（FTIR）气体分析技术测得22种气态组分的时间依赖性浓度分布，并基于该分布计算质量释放速率。为验证实验所得动力学数据是否处于反应动力学控制区间，本研究采用结合阿伦尼乌斯（Arrhenius）方法的全局反应模型（GRM）开展验证。与文献数据对比后可知，在523 K至973 K的温度区间内，可可靠获取热解动力学数据。本次获取的数据集在时间分辨率与被测气态组分种类数量上均独具特色，因此可作为该温度区间内网络模型的验证数据集使用。当温度高于该区间时，由于气体无法充分输送至异位测量设备，热解反应将出现畸变。