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Kinetics of the catalytic combustion of diesel soot with MoO3/Al2O3 catalyst from thermogravimetric analyses

Paper ID Volume ID Publish Year Pages File Format Full-Text
43017 45951 2008 6 PDF Available
Title
Kinetics of the catalytic combustion of diesel soot with MoO3/Al2O3 catalyst from thermogravimetric analyses
Abstract

Catalytic combustion of diesel soot was performed over a 15-wt.% MoO3/Al2O3 catalyst 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 163 kJ/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.

Graphical abstractCatalytic combustion of diesel soot was performed over a molybdenum catalyst in a thermogravimetric analysis (TGA) experiment. Based on a first-order kinetic model, kinetic parameters were estimated for several experimental conditions, providing a suitable adjustment of the available experimental data. The analysis of the estimates of parameters 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 thermogravimetric analysis, with simultaneous parameter estimation, can improve the statistical significance of the obtained results and lead to better understanding of the analyzed process.Figure optionsDownload full-size imageDownload as PowerPoint slide

Keywords
Diesel soot; Thermogravimetric analysis (TGA); Kinetic modeling; Parameter estimation; Experimental design; Compensation effect
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Publisher
Database: Elsevier - ScienceDirect
Journal: Applied Catalysis A: General - Volume 342, Issues 1–2, 30 June 2008, Pages 87–92
Authors
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Subjects
Physical Sciences and Engineering Chemical Engineering Catalysis
Get Full-Text Now
Don't Miss Today's Special Offer
Price was $35.95
You save - $31
Price after discount Only $4.95
100% Money Back Guarantee
Full-text PDF Download
Online Support
Any Questions? feel free to contact us