Detailed kinetic analysis of oil shale pyrolysis TGA data

There are significant resources of oil shale in the western United States, which if exploited in an environmentally responsible manner would provide secure access to transportation fuels. Understanding the kinetics of kerogen decomposition to oil is critical to designing a viable process. A dataset...

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Bibliographic Details
Published in:AIChE journal 2012-02, Vol.58 (2), p.505-515
Main Authors: Tiwari, Pankaj, Deo, Milind
Format: Article
Language:English
Subjects:
Applied sciences
Chemical engineering
Continental surface waters
Exact sciences and technology
Fittings
Mathematical models
Natural water pollution
Oil shale
oil shale/tar sands
Permissible error
petroleum
Pollution
Pyrolysis
Reaction kinetics
Rivers
Roots
Thermogravimetric analysis
Water treatment and pollution
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Summary:There are significant resources of oil shale in the western United States, which if exploited in an environmentally responsible manner would provide secure access to transportation fuels. Understanding the kinetics of kerogen decomposition to oil is critical to designing a viable process. A dataset of thermogravimetric analysis (TGA) of the Green River oil shale is provided and two distinct data analysis approaches—advanced isoconversional method and parameter fitting are used to analyze the data. Activation energy distributions with conversion calculated using the isoconversional method (along with uncertainties) ranged between 93 and 245 kJ/mol. Root mean square errors between the model and experimental data were the lowest for the isoconversional method, but the distributed reactivity models also produced reasonable results. When using parameter fitting approaches, a number of models produce similar results making model choice difficult. Advanced isoconversional method is better in this regard, but maybe applicable to a limited number of reaction pathways. © 2011 American Institute of Chemical Engineers AIChE J, 2012
ISSN:0001-1541
1547-5905
DOI:10.1002/aic.12589