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

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• 作者：Nashaat N. Nassar ; ^{nassar@ucalgary.ca} ; Azfar Hassan ; German Luna ; Pedro Pereira-Almao
• 关键词：Asphaltenes ; Nanoparticles ; Activation energy ; Oxide
• 刊名：Catalysis Today
• 出版年：2013
• 出版时间：30 May, 2013
• 年：2013
• 卷：207
• 期：Complete
• 页码：127-132
• 全文大小：890 K

文摘

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.