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Kinetics of the catalytic thermo-oxidation of asphaltenes at isothermal conditions on different metal oxide nanoparticle surfaces

Paper ID Volume ID Publish Year Pages File Format Full-Text
54869 47029 2013 6 PDF Available
Title
Kinetics of the catalytic thermo-oxidation of asphaltenes at isothermal conditions on different metal oxide nanoparticle surfaces
Abstract

Thermogravimetry analyses have been employed to study the catalytic effect of different metal oxide nanoparticles on the thermo-oxidative decomposition of asphaltenes at isothermal conditions. Three metal oxide nanoparticles were considered in this study, namely: NiO, Co3O4 and Fe3O4. Results showed that the presence of nanoparticles decreased the activation energy of asphaltenes oxidation and enhanced the reaction rate. It appears that the thermo-oxidative reaction is metal oxide specific. The obtained kinetic data showed that NiO has the highest reaction rate followed by Co3O4 and then Fe3O4, which suggests a change in the reaction mechanism.

Graphical abstractIsothermal conversion for thermal oxidation of asphaltenes at 360 °C without nanoparticles and at 300 °C in the presence of nanoparticles.Figure optionsDownload full-size imageDownload high-quality image (138 K)Download as PowerPoint slideHighlights► Metal oxide nanoparticles enhanced the reaction rate of asphaltene thermo-oxidation. ► The thermo-oxidative reaction is metal oxide specific. ► NiO nanoparticles have the highest reaction rate. ► Differences in activation energy for different nanoparticles suggest different reaction mechanisms.

Keywords
Asphaltenes; Nanoparticles; Activation energy; Oxide
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Kinetics of the catalytic thermo-oxidation of asphaltenes at isothermal conditions on different metal oxide nanoparticle surfaces
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Publisher
Database: Elsevier - ScienceDirect
Journal: Catalysis Today - Volume 207, 30 May 2013, Pages 127–132
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
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Full-text PDF Download
Online Support
Any Questions? feel free to contact us