Kinetics of the catalytic combustion of diesel soot with MoO3/Al2O3 catalyst from thermogravimetric analyses
Kinetics of the catalytic combustion of diesel soot with MoO3/Al2O3 catalyst from thermogravimetric analyses
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DOI：
10.1016/j.apcata.2008.03.004
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发表时间：
2008-06
影响因子：
5.5
通讯作者：
F. Toniolo;Elisa Barbosa-Coutinho;Marcio Schwaab;I. Leocadio;R. S. Aderne;M. Schmal;J. Pinto
中科院分区：
文献类型：
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作者：
F. Toniolo;Elisa Barbosa-Coutinho;Marcio Schwaab;I. Leocadio;R. S. Aderne;M. Schmal;J. Pinto
在热重分析 (TGA) 系统中，以不同的加热速率和颗粒浓度，在 15 wt.% MoO3/Al2O3 催化剂上进行柴油烟灰的催化燃烧。然后根据一阶动力学模型和微分质量平衡方程的数值积分，估计了几种实验条件下的动力学参数。根据类似系统的已发表数据，活化能的估计值在 139 至 163kJ/mol 之间。参数估计的分析表明，所谓的补偿效应仅仅是参数相关性的结果，可以通过阿伦尼乌斯方程的重新参数化轻松消除。最后，结果表明，所提出的动力学模型为可用的实验数据提供了合适的拟合。此外，研究表明，热重分析与同步参数估计可以提高所得结果的统计显着性，并有助于更好地理解分析过程。
Catalytic combustion of diesel soot was performed over a 15-wt.% MoO3/Al2O3catalyst in a thermogravimetric analysis (TGA) system, at distinct heating rates and particulate concentrations. Kinetic parameters were then estimated for several experimental conditions, based on a first-order kinetic model and on the numerical integration of the differential mass balance equations. The estimated values of activation energies lie between 139 and 163kJ/mol, in accordance with published data for similar systems. The analysis of the parameter estimates shows that the so-called compensation effect is a mere consequence of parameter correlation, which can be easily removed through reparameterization of the Arrhenius equation. Finally, it is shown that the proposed kinetic model provides suitable fits for the available experimental data. Besides, it is shown that thermogravimetric analysis, with simultaneous parameter estimation, can improve the statistical significance of the obtained results and lead to better understanding of the analyzed process.