Adsorption of Algerian Asphaltenes onto Synthesized Maghemite Iron Oxide Nanoparticles
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Adsorption of Algerian Asphaltenes onto Synthesized Maghemite Iron Oxide Nanoparticles H. Abbasa,b, A. D. Manasrahb,c,*, A. Abidi Saada, K. O. Sebakhyd, and Y. Bouhaddae a Laboratoire
de géologie du Sahara, Université Kasdi Merbah Ouargla, Ouargla, 30000 Algeria of Chemical and Petroleum Engineering, University of Calgary, Calgary, T2N1N4 Canada c Carbon OxyTech Inc. Calgary, Alberta, T2L1Y8 Canada d Department of Chemical Engineering, Engineering and Technology Institute Groningen (ENTEG), University of Groningen, Groningen, 9747 Netherlands e Laboratoire de Chimie physique des Macromolécules et interfaces biologiques, Mascara, 29000 Algeria *e-mail: [email protected] b Department
Received April 28, 2020; revised July 24, 2020; accepted September 18, 2020
Abstract—In this study, the adsorption of Algerian asphaltene sample extracted from Hassi Messaoud oil field is conducted for the first time. The adsorption process was performed using novel synthesized iron oxide nanoparticles (γ-Fe2O3). γ-Fe2O3 Nanoparticles were in-house synthesized and characterized by an array of techniques using, Brunauer–Emmett–Teller (BET), high-resolution transmission electron microscopy (HRTEM) and X-ray diffraction (XRD). The results showed that the synthesized nanoparticles have an average crystalline domain size around 10 nm and a specific surface area of 120 m2/g. The adsorption process of the Algerian asphaltenes took place in a batch mode by dissolving the asphaltenes in toluene at 25°C. Different initial concentrations of asphaltene solutions were used in this study, namely 100, 500, and 1000 ppm. During this adsorption, both isotherm and kinetic studies were investigated. The results showed that the synthesized iron oxide nanoparticles are promising nano-adsorbents that have a high affinity to remove the asphaltenes and the equilibrium was recorded after 15 min. The Solid–Liquid–Equilibrium (SLE) model was used to correlate the adsorption experimental data. Keywords: Algerian asphaltenes, adsorption, iron oxide, nanoparticles, Solid–Liquid–Equilibrium
DOI: 10.1134/S0965544121010072 industry [8, 9]. Metal oxide nanoparticles like iron oxides, for instance, are one of particular interest because they tend to associate with asphaltene molecular aggregates and can behave as efficient nanoadsorbents [10, 11]. A recent study on Hamaca asphaltenes adsorption showed that iron oxide had an uptake of 3.5 to 4 mg asphaltenes/ m2 at a temperature near to room temperature using a high dosage of adsorbent (50 to 30 g/L) [10]. Impregnation of Fe2O3 on the surface of kaolinite, carbon nanotubes (CNT), montmorillonite and SiO2 strongly improved the adsorption capacity relative to the surfaces of unmodified sorbent bases [12, 13]. Nassar et al. for instance, used six different metal oxide nanoparticles for the adsorption and oxidation of asphaltenes, namely Fe3O4, Co3O4, TiO2, MgO, CaO, and NiO [14, 15]. The results showed that the adsorption of asphaltenes was affected by the types of metal oxides and the asphaltenes uptake followed
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