Effects of Resins on Aggregation and Stability of Asphaltenes

Анисимов, М. А.; Ganeeva, Yu. M.; Городецкий, Е. Е.; Deshabo, V. A.; Kosov, V.I.; Kuryakov, Vladimir N.; Yudin, Dmitry; Yudin, I. K.

doi:10.1021/ef501145a

Cited by 56 publications

(55 citation statements)

References 58 publications

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“…Using DLS experiments, the kinetic of asphaltene aggregation-fragmentation in the presence of silica nanoparticles in Heptol 20 solutions could not be determined due to the low signal/noise ratio. Probably this is due to the size of particles being lower that the detection limit of the DLS technique used 97. This is coherent with the results observed inFigure 5bfor n-C 7 asphaltenes growth in the presence of silica nanoparticles in Heptol 40 that showed the lowest asphaltene aggregates among the evaluated nanoparticles.…”

supporting

confidence: 86%

Development of a Population Balance Model to Describe the Influence of Shear and Nanoparticles on the Aggregation and Fragmentation of Asphaltene Aggregates

Nassar

Betancur

Acevedo

et al. 2015

Ind. Eng. Chem. Res.

115

120

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The precipitation and deposition of asphaltenes is a primary problem related to the processing, transportation and production of oil. Flocculation of asphaltene aggregates is likely to occur during the production and processing of crude oil. Recently, it has been shown that nanotechnology in the form of nanoparticles is useful for the inhibition or prevention of asphaltene formation damage. Although it is well known that the adsorption of asphaltenes on the nanoparticle surface would reduce the capacity of these asphaltic compounds to interact with each other, limited studies have been performed regarding the processes and the mechanisms associated with the effect of nanoparticles on the inhibition of the formation damage due to asphaltenes. To better understand this phenomenon from a mathematical approach, a population balance model (PBM) is proposed to describe the kinetics of asphaltene flocculation-fragmentation in the presence of nanoparticles. The model assumes that asphaltenes in the presence of a shear rate are related to the aggregation and fragmentation phenomena and includes a term related to the asphaltene adsorption on nanoparticles. An adsorption kinetic term was introduced into the model using the double exponential model. Experimental data of the kinetics of asphaltene aggregation were obtained by Dynamic Light Scattering (DLS) measurements at a fixed initial asphaltene concentration of 1000 mg/L and with different Heptol mixtures. In this study, commercial silica, γ-alumina and magnetite nanoparticles were used as adsorbents to study the effect of the chemical nature of the nanoparticles on the inhibition of the asphaltene growth and for model validation. Additionally, to demonstrate the versatility of the proposed model, the effect of asphaltene was also evaluated. The obtained results from the proposed population balance model agree well with the experimental data, within an % RSME < 9%.

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supporting

confidence: 86%

Development of a Population Balance Model to Describe the Influence of Shear and Nanoparticles on the Aggregation and Fragmentation of Asphaltene Aggregates

Nassar

Betancur

Acevedo

et al. 2015

Ind. Eng. Chem. Res.

115

120

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“…In [6,15] was shown that the one of the main factors affecting the colloidal stability of crude oil is (Table 1).…”

Section: Resultsmentioning

confidence: 99%

“…It is shown that resins serve as inhibitors for asphaltene aggregation, shifting the onset of aggregation. However, the dependence of the onset on the concentration of resins has a tendency to saturate [6,7]. In the structuring of oil dispersed systems the focus is on asphaltenes, which affect the stability of colloidal oil structure.…”

Section: Introductionmentioning

confidence: 99%

Dynamics of Changes in Composition and Stability of the Heavy Oil Sampled from the Usinskoye Oil Field as a Result of Formation Treatment with a Sol-Forming EOR System

Chuikina

Петренко

Stakhina

2019

Journal of Siberian Federal University. Chemistry

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The paper deals with a sol-forming system for oil recovery enhancement (EOR system) used to increase the rate of heavy oil displacement. The effect of sol-forming EOR system during the heavy oil displacement on the composition and stability of oil sampled from the Usinskoye oil field of Russia is investigated. The composition of a crude oil also plays an important role in changing its stability. The work is aimed to investigate stability of heavy crude oil in regards to asphaltene precipitation. For asphaltene toluene/n-heptane solutions, the aggregation stability of asphaltenes based on сhange in the optical density with time is investigated via spectrophotometry. SARA analysis is used to characterize the compositions of heavy oils. First, the content of asphaltenes precipitated from the oil samples is determined and then the samples of deasphalted crude oil (maltenes) are analyzed by the method of liquid adsorption chromatography for the purpose to study the composition of oil sampled from the wells before and after their treatment with the sol-forming EOR system. It is found out that the treatment of reservoir crude oil with the sol-forming EOR system results in changes in composition of saturated, aromatic hydrocarbons, resins, and asphaltenes (SARA components) and aggregative stability of produced oil. The results obtained showed that the aggregative stability of heavy oil depends not only on the content of SARA components in the dispersion medium but on the presence of metalloporphyrins in the oil. Metalloporphyrins could act as inhibitors of asphaltene precipitation, which is an additional factor responsible for the stabilization of the oil dispersed system

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“…known from the literature [17,42] that petroleum resins are used to improve the ductility and adhesion of bitumen, as well as to reduce internal friction during processing (mixing, molding) of industrial rubber goods. The observed effect can also be associated with the structural features of petroleum resins' molecules, which have long alkyl chains and have surface-active properties [7,10].…”

Section: Physicomechanical Propertiesmentioning

confidence: 97%

“…Although the average molecular weight of resins is lower than that of asphaltenes [9], this is not a significant factor in determining the difference in the behavior of asphaltenes and resins. The main difference is associated with a lower polarity of resins' molecules [10]. As a result, asphaltenes usually defined as hydrocarbons, which are soluble in aromatic and insoluble in saturated compounds, while resins are insoluble in liquid propane and butane, but soluble in pentane and more highly molecular n-alkanes [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Heavy Oil Residues: Application as a Low-Cost Filler in Polymeric Materials

et al. 2019

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Deposits of oil sands, bitumen, extra-heavy oil, and heavy oil appear in more than 70 countries all over the world and the fraction of oil recovered gradually increases. High content of poly-condensed high molecular weight oil components (PHMOCs), which may amount up to 50-60% depending on conditions of oil formation, is the main difference of heavy oil and bitumen from conventional oil. PHMOCs can lay the foundation for the preparation of a large number of valuable materials due to their structural manifold and their potential still not discovered to full extent. This work is devoted to the study of the effect of PHMOCs on properties of the composition materials prepared from polyethylene matrix. An «asphalt» – industrial product of deasphalting of tar, as well as asphaltenes and resins isolated from heavy oil, were used as a source of PHMOCs. HDPE and fillers were characterized using MALDI, FTIR, DSC and TGA. For the new composite materials we evaluated the physicomechanical properties, the thermal decomposition characteristics (by TGA), and the accumulation rate of carbonyl groups in the oxidized polymer (on FTIR). Studies of new composite materials showed that the introduction of filler in an amount of up to 4% in a polyethylene matrix does not lead to a significant change in the physicomechanical properties, but for a number of parameters they are improved. It also figured out that the addition of PHMOCs to polyethylene makes it unnecessary to stabilize the resulting compositions with stabilizers of thermal oxidative degradation. Results of experimental studies indicate that industrial residue - «asphalt» is a promising filler and low cost of this stock renders it perfect source for the industry of polymer materials.

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Effects of Resins on Aggregation and Stability of Asphaltenes

Cited by 56 publications

References 58 publications

Development of a Population Balance Model to Describe the Influence of Shear and Nanoparticles on the Aggregation and Fragmentation of Asphaltene Aggregates

Development of a Population Balance Model to Describe the Influence of Shear and Nanoparticles on the Aggregation and Fragmentation of Asphaltene Aggregates

Dynamics of Changes in Composition and Stability of the Heavy Oil Sampled from the Usinskoye Oil Field as a Result of Formation Treatment with a Sol-Forming EOR System

Heavy Oil Residues: Application as a Low-Cost Filler in Polymeric Materials

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