Investigation of the performance of nanostructured iron-oxide synthesized by sol-gel method in adsorption of asphaltene extracted from crude oil and modeling of adsorption isotherm

Document Type : Research Article


Iran University of Science and Technology


The asphaltene in crude oil causes many problems in the production, processing and transportation of crude oil, The most important of these are clogged wells and pipelines, inactivation and poisoning of catalysts. In this study, the adsorption of extracted asphaltene of crude oil sample on five iron oxide nano particles synthesized by Pechini method in the presence and absence of propylene oxide and polyethylene glycol, as conventional agents used in sol-gel method for gel formation, was investigated. Solutions with different combinations of asphaltene and toluene were prepared and a certain amount of 4 g/l iron nanoparticles was poured into the solutions and placed on a shaker at 250 rpm for 15 hours. The unknown concentration of the samples was determined by UV-visible analysis. The results showed that iron oxide synthesized without propylene oxide and polyethylene glycol with an adsorption rate of 37.31 had the best performance in asphaltene adsorption and was also more economical.The adsorption results were described using Langmuir and Freundlich isotherms and the physical properties of the nano particles were determined by XRD and BET analyzes.


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