Department of Chemical Engineering, Motilal Nehru National Institute of Technology Allahabad, Prayagraj - 211004, Uttar Pradesh, India.
Department of Chemical Engineering, Gharda Institute of Technology, Lavel-415708, Maharashtra, India.
Bioresour Technol. 2022 Mar;347:126440. doi: 10.1016/j.biortech.2021.126440. Epub 2021 Nov 28.
Detailed analysis of thermo-kinetics, reaction mechanism, and estimation of thermodynamic parameters are imperative for the design of reactor systems in thermochemical conversion processes. Present investigation was aimed at exploring the pyrolysis potential of pigeon pea stalk (PPS) by thermogravimetric experiments at 10, 20, and 30 °C/min heating rates. Maximum devolatilization of PPS was found to take place below 480 °C. The average activation energy for PPS pyrolysis was found to be 95.97, 100.74, 96.24, and 96.64 kJ/mol by Kissinger-Akahira-Sunose, Flynn-Wall-Ozawa, Starink, and Friedman method, respectively. Statistical analysis by one way analysis of variance method by employing Tukey test revealed that the difference in activation energy estimated from different methods was insignificant. Thermodynamic parameters (ΔH, ΔS and ΔG) together with reaction mechanisms were also evaluated. Difference in the activation energy and enthalpy was found to be less than 5 kJ/mol. R2 and R3 models were found best fitted with experimental PPS pyrolysis data.
详细的热动力学分析、反应机制以及热力学参数的估算对于热化学转化过程中反应器系统的设计至关重要。本研究旨在通过在 10、20 和 30°C/min 的加热速率下进行热重实验来探索 pigeon pea stalk（PPS）的热解潜力。发现 PPS 的最大挥发发生在 480°C 以下。通过 Kissinger-Akahira-Sunose、Flynn-Wall-Ozawa、Starink 和 Friedman 方法分别计算出 PPS 热解的平均活化能为 95.97、100.74、96.24 和 96.64 kJ/mol。通过采用 Tukey 检验的单因素方差分析方法进行的统计学分析表明，不同方法估算的活化能之间的差异不显著。还评估了热力学参数（ΔH、ΔS 和 ΔG）和反应机制。发现活化能和焓的差异小于 5 kJ/mol。R2 和 R3 模型被发现最适合拟合实验 PPS 热解数据。
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