Predicting adsorption isotherms of asphaltenes in porous materials

Castro, M.; Cruz, José L. Mendoza de la; Buenrostro-González, Eduardo; López-Ramírez, Simón; Gil‐Villegas, Alejandro

doi:10.1016/j.fluid.2009.08.009

Cited by 52 publications

(50 citation statements)

References 41 publications

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“…57 for adsorption of n-C 7 asphaltenes, extracted from a Mexican crude oil, onto limestone, dolomite and Berea minerals at concentrations between 10 and 30000 mg/L. Figure 4, the isotherm curves shift to the left as system pressure increases, indicating that the amount of asphaltenes adsorbed increased as the system pressure increased; this difference was more noticeable at higher concentrations (>0.35 mg/g) because the asphaltene-asphaltene and solid-surfaceasphaltene interactions presumably increased.…”

Section: Effect Of Pressurementioning

confidence: 99%

A New Model for Describing the Adsorption of Asphaltenes on Porous Media at a High Pressure and Temperature under Flow Conditions

et al. 2015

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Asphaltenes may generate production loss in oil reservoirs, because of several factors related to the interaction between the asphaltene molecules, aggregates, and the reservoir rock. Consequently, this could alter the wettability of the rock surface, increase the viscosity of the crude oil, and reduce the permeability of the porous media. In a previous study, we have developed the solid−liquid equilibrium (SLE) model based on Chemical Theory to describe the adsorption behavior of asphaltenes onto porous and nonporous solid surfaces. However, the SLE model neglects the effect of pressure on the interactions of asphaltene−asphaltene and asphaltene−aggregate−solid surfaces of the reservoir rock primarily under reservoir conditions (RC). Thus, in this study, to account for the effect of pressure, a modification to the previously developed SLE equation is presented. In this study, a novel and original modelcalled the SLE-RC model of adsorptionhas been proposed to describe the adsorption mechanism mainly under reservoir conditions, for which the pressure and temperature effect has been evaluated. This model describes the temperature−pressure−dependent adsorption isotherms with five parameters: the maximum amount adsorbed, the constant of the i-mer reactions, Henry's law constant, the molar volume, and the solubility parameter of the asphaltenes. The proposed model has been validated with adsorption tests on porous media under flow conditions at different pressures and temperatures. The dynamic adsorption experiments were performed at different asphaltene concentrations (100−2000 mg/L), pressures (6.89−17.24 MPa), and temperatures (313−353 K). The SLE-RC model was successful validated using more than five experimental data describing the adsorption isotherms of the asphaltene onto a packed bed of silica sand at high pressure and temperature and following a Type III behavior with root-mean-square errors (RMSE%) below 2%. In addition, the packed sands used in the adsorption tests were analyzed based on surface and color changes using scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy (EDX) analysis, and polarized light microscopy (PLM); the results were in agreement with the SLE-RC model parameters.

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Section: Effect Of Pressurementioning

confidence: 99%

A New Model for Describing the Adsorption of Asphaltenes on Porous Media at a High Pressure and Temperature under Flow Conditions

et al. 2015

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“…[46] However, multilayer adsorption of asphaltenes onto mineral surfaces (Bedford limestone, Berea sandstone and dolomite) with adsorbed values in the range 100 -200 mg/m 2 at very high asphaltene concentrations in toluene has also been reported. [47] The multilayer step wise asphaltene adsorption has been attributed to the asphaltene association and formation of aggregates. [43] To the best of our knowledge, only limited studies [48,49] on the fractionation of asphaltenes based on functionality or polarity has been undertaken since the retention of the asphaltenes onto the solid adsorbent is considered to be a drawback.…”

Section: Introductionmentioning

confidence: 99%

Asphaltene fractionation based on adsorption onto calcium carbonate: Part 1. Characterization of sub-fractions and QCM-D measurements

Subramanian

Simon

Gao

et al. 2016

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…A number of interparticle forces are responsible for this successful interaction, individually or collectively, between asphaltenes and the surface resulting from functionalized groups on the asphaltenes, including carboxylic, pyrrolic, pyridininc, thiophenic, and sulfite groups [30]. The major forces that could contribute to these interactions are van der Waals, electrostatic, charge transfer, hydrogen bonding, and steric interactions [2,31]. Despite the extensive studies on the asphaltene adsorption onto solid surfaces, to the best of our knowledge, no single work has been reported on the effect of solid surface acidity and basicity on the asphaltene adsorption behavior.…”

Section: Introductionmentioning

confidence: 99%

Effect of surface acidity and basicity of aluminas on asphaltene adsorption and oxidation

Nassar

Hassan

Pereira‐Almao

2011

Journal of Colloid and Interface Science

135

122

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Predicting adsorption isotherms of asphaltenes in porous materials

Cited by 52 publications

References 41 publications

A New Model for Describing the Adsorption of Asphaltenes on Porous Media at a High Pressure and Temperature under Flow Conditions

A New Model for Describing the Adsorption of Asphaltenes on Porous Media at a High Pressure and Temperature under Flow Conditions

Asphaltene fractionation based on adsorption onto calcium carbonate: Part 1. Characterization of sub-fractions and QCM-D measurements

Effect of surface acidity and basicity of aluminas on asphaltene adsorption and oxidation

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