Asphaltene flocculation in crude oil systems

Browarzik, D.; Laux, H.; Rahimian, I.

doi:10.1016/s0378-3812(98)00434-8

Cited by 37 publications

(20 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…56,[91][92][93] Additionally, the increasing trend of m N shown as the pressure increases agrees with the experimental results. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 …”

Section: As Shown Insupporting

confidence: 88%

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

et al. 2015

View full text Add to dashboard Cite

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.

show abstract

Section: As Shown Insupporting

confidence: 88%

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

et al. 2015

View full text Add to dashboard Cite

show abstract

“…The solvated asphaltene crystallites are the primary particles of a colloidal dispersed phase. These particles can associate and aggregate forming large particles dependent on temperature, pressure and concentration [7,8,11,13,[17][18][19][20][21][22][23][24][25][26][27]30,[40][41][42][43]. It is well known that asphaltenes are natural surfactants stabilising water/crude oil emulsion [13,14,[44][45][46][47][48][49][50][51][52][53].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of asphaltenes from toluene on typical soils of Lublin region

Szymula

Marczewski

2002

Applied Surface Science

View full text Add to dashboard Cite

Adsorption of asphaltenes on soils is one of the important problems, though largely underestimated, in environment protection of Lublin region. Asphaltene adsorption properties affect the way the contamination spreads in soil. Analysis of this phenomenon may help in localisation and elimination of oil spills. The asphaltenes studied were obtained from local drills (Ś widnik near Lublin, Poland). In our previous paper, we investigated adsorption of asphaltenes from toluene on rock components (quartz, dolomite, calcite, kaolin as well as pure iron and titanium oxides). In order to simulate the natural oil spill conditions, we used toluene as solvent and typical soils from Lublin region as adsorbents (black earth, peat soil, lessive soil, brown soil, sandy podsolised soil, pararendzina soil). Main physicochemical properties of these soils were reported. Moreover, basic adsorption properties (nitrogen adsorption, adsorption of surfactants from water solutions, acidity, etc.) of several soil fraction were studied. We decided to use only certain mineral fractions with highest adsorption capacity, as other fractions have limited impact on total adsorption. Adsorption on soil fraction gives also some insight into relative importance of various soil components on summary soil properties. The results of adsorption measurements are described in terms of physical adsorption on heterogeneous solids. # 2002 Published by Elsevier Science B.V.

show abstract

“…Kawanaka et al (1989) presented a thermodynamic model to predict the size distribution of asphaltene particles. Browarzik et al (1999) modeled the average molar mass of asphaltene in the solutions at equilibrium. Yudin et al (1998b) introduced two mechanisms, RLA and DLA, for the growth of asphaltene particles that have been used by Hung et al (2005) and Seifried et al (2013).…”

Section: Asphaltene Precipitation Modelingmentioning

confidence: 99%

Investigation into mechanisms and kinetics of asphaltene aggregation in toluene/n-hexane mixtures

2019

View full text Add to dashboard Cite

Determining the rate of asphaltene particle growth is one of the main problems in modeling of asphaltene precipitation and deposition. In this paper, the kinetics of asphaltene aggregation under different precipitant concentrations have been studied. The image processing method was performed on the digital photographs that were taken by a microscope as a function of time to determine the asphaltene aggregation growth mechanisms. The results of image processing by MATLAB software revealed that the growth of asphaltene aggregates is strongly a function of time. Different regions could be recognized during asphaltene particle growth including reaction-and diffusion-limited aggregation followed by reaching the maximum asphaltene aggregate size and start of asphaltene settling and the final equilibrium. Modeling has been carried out to predict the growth of asphaltene particle size based on the fractal theory. General equations have been developed for kinetics of asphaltene aggregation for reaction-limited aggregation and diffusion-limited aggregation. The maximum size of asphaltene aggregates and settling time were modeled by using force balance, acting on asphaltene particles. Results of modeling show a good agreement between laboratory measurements and model calculations.

show abstract

Asphaltene flocculation in crude oil systems

Cited by 37 publications

References 4 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

Adsorption of asphaltenes from toluene on typical soils of Lublin region

Investigation into mechanisms and kinetics of asphaltene aggregation in toluene/n-hexane mixtures

Contact Info

Product

Resources

About