Parthasarathy Prakash, Fernandez Anabel, Al-Ansari Tareq, Mackey Hamish R, Rodriguez Rosa, McKay Gordon
Division of Sustainable Development, College of Science and Engineering, Hamad Bin Khalifa University, P.O. Box:, 34110, Education City, Doha, Qatar.
Instituto de Ingeniería Química, Facultad de Ingeniería (UNSJ), Grupo Vinculado al PROBIEN (CONICET-UNCo), San Juan, Argentina.
J Environ Manage. 2021 Jun 1;287:112345. doi: 10.1016/j.jenvman.2021.112345. Epub 2021 Mar 16.
In this work, the sustainable valorisation of camel manure has been studied using thermogravimetric analysis. The gasification tests were performed from ambient conditions to 950 °C at 10, 20, and 50 °C/min under an O environment. The TGA data were applied to determine the kinetics of the O gasification. Single-heating rate models (Arrhenius and Coats-Redfern) and multi-heating rate models (Distributed activation energy, Friedman, Flynn-Wall-Ozawa, Starink, and Kissinger-Akahira-Sunose) were applied to estimate the kinetics of the process. Between the two single-heating rate models, the Coats-Redfern method fitted best with the experimental data. Among the multi-heating rate models, the Flynn-Wall-Ozawa model fitted best with the experimental results. The kinetic parameters-frequency factor, activation energy, and order of reaction were estimated using the Flynn-Wall-Ozawa model (the best-fitting model) and the estimated kinetic parameters were used to calculate the thermodynamic properties-Gibbs free energy, enthalpy, and entropy. The information on these kinetic and thermodynamic properties can be useful for the design of gasifiers and for optimising the O gasification operating conditions.
在这项工作中，利用热重分析研究了骆驼粪便的可持续增值利用。在氧气环境下，以10、20和50℃/分钟的升温速率从环境条件到950℃进行了气化试验。热重分析（TGA）数据用于确定氧气气化的动力学。应用单升温速率模型（阿累尼乌斯和科茨-雷德芬）和多升温速率模型（分布活化能、弗里德曼、弗林-沃尔-小泽、斯塔林克以及基辛格-赤平-ose）来估算该过程的动力学。在两个单升温速率模型中，科茨-雷德芬方法与实验数据拟合得最好。在多升温速率模型中，弗林-沃尔-小泽模型与实验结果拟合得最好。使用弗林-沃尔-小泽模型（最佳拟合模型）估算动力学参数——频率因子、活化能和反应级数，并利用估算的动力学参数计算热力学性质——吉布斯自由能、焓和熵。这些动力学和热力学性质的信息对于气化炉的设计以及优化氧气气化操作条件可能是有用的。
