In this study, a nonisothermal kinetics analysis of petcoke was performed at heating rates of 10, 15, and 20°C/min using thermal gravimetric analysis (TGA). The behaviour of petcoke at different gasification stages (dewatering, volatilization, char burning, and burnout) was studied. The effect of heating rate on the activation energy of petcoke gasification was also investigated. The activation energy of petcoke was estimated using different kinetic models that include volume reaction model (VRM), shrinking core model (SCM), random pore model (RPM), Coats and Redfern model (CRM), and normal distribution function (NDF). The NDF model was modified in this study. It was found that the experimental data were best fitted with the modified normal distribution function (MNDF) and SCM. The results also showed that activation energy decreases as heating rate increases, leading to reduction in gasification completion time.

中文翻译：

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石油焦动力学分析的改进模型

在这项研究中，使用热重分析（TGA）在10、15和20°C / min的加热速率下进行了石油焦的非等温动力学分析。研究了石油焦在不同气化阶段（脱水，挥发，焦炭燃烧和燃尽）的行为。还研究了升温速率对石油焦气化活化能的影响。使用不同的动力学模型（包括体积反应模型（VRM），收缩核模型（SCM），随机孔模型（RPM），Coats and Redfern模型（CRM）和正态分布函数（NDF））估算石油焦的活化能。在这项研究中修改了NDF模型。发现实验数据最好与修正的正态分布函数（MNDF）和SCM拟合。