Electrochemical Properties of Asphaltene Particles in Aqueous Solutions

Szymula, Marta; Janusz, W.; Jabloriski, Jerzy

doi:10.1080/01932690008913308

Cited by 22 publications

(15 citation statements)

References 20 publications

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“…Their model considers the carboxylic and hydroxyl ionizable sites as proposed by Szymula et al . 28 . This model assumes that the zeta potential is equal to the surface potential.…”

Section: Previous Models For the Assessment Of The Surface Charge At mentioning

confidence: 99%

“…The naphtenic acids represent a mixture of mainly cyclopentyl and cyclohexyl carboxylic acids with molecular weight between 120–700 and a lower content of other fractions (carboxyphenols, porphyrins, and asphaltene) 59 . On the other hand, other authors consider asphaltene content responsible for the charge development at the oil/brine interface 28,60 . Szymula et al .…”

Section: Surface Complexation Modelmentioning

confidence: 99%

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An overview of the oil-brine interfacial behavior and a new surface complexation model

Bonto

Eftekhari

Nick

2019

Sci Rep

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The few existing surface complexation models (SCM) for the brine-oil interface have important limitations: the chemistry of each crude oil is not considered, they cannot capture the water/non-polar hydrocarbons surface charge, the interactions between Na + and the acid sites are not included, and the equilibrium constants for the adsorption reactions are not validated against experimental data. We address the aforementioned constraints by proposing an improved diffuse-layer SCM for the oil-brine interface. The new model accounts for the chemistry of crude oils by considering surface sites linearly dependent on the TAN (total acid number) and TBN (total base number). We define weak sites to account for the negative surface charge observed for non-polar hydrocarbons in water. We optimize the parameters of our model by fitting the model to reported zeta potential measurements of oil in aqueous solutions. When we validate the optimized model against different experimental data sets, it generally shows a good performance in predicting the surface charge of oil in different brines with different pHs. We show that the acid and base numbers are only useful as a qualitative estimation of the distribution of polar groups at the oil surface, and more sophisticated analysis is necessary to quantify the chemistry of the oil-brine interface.

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“…Their model considers the carboxylic and hydroxyl ionizable sites as proposed by Szymula et al . 28 . This model assumes that the zeta potential is equal to the surface potential.…”

Section: Previous Models For the Assessment Of The Surface Charge At mentioning

confidence: 99%

Section: Surface Complexation Modelmentioning

confidence: 99%

An overview of the oil-brine interfacial behavior and a new surface complexation model

Bonto

Eftekhari

Nick

2019

Sci Rep

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“…Because of their interfacial activity, asphaltenes are of special interest from a colloidal point of view . Asphaltenes can adsorb electrolyte ions from brine solution [28][29][30] and they may be adsorbed from organic solution on rock reservoir and soils [1,[31][32][33][34][35][36][37][38][39]. One should expect, that these adsorption processes are further complicated by the behaviour of asphaltenes in organic solutions.…”

Section: Introductionmentioning

confidence: 99%

“…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

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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.

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“…Since their interfacial activity, asphaltenes are of special interest from a colloidal point of view [2,10,. Asphaltenes as an organic colloid can adsorb electrolyte ions from aqueous solutions [1][2][3]36]. However, they may themselves be adsorbed from the organic phase on rock reservoirs [5,[37][38][39][40][41].…”

Section: Introductionmentioning

confidence: 99%

Adsorption of asphaltenes from toluene on mineral surface

Marczewski

Szymula

2002

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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124

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Undesirable adsorption of asphaltenes on rock minerals was studied. Asphaltenes are an important component of crude oil, being also natural surfactant stabilising water/crude oil emulsions. Owing to their chemical nature, asphaltenes are able to associate, form micelles and create a surface charge at the interface. Asphaltenes may be adsorbed on rock reservoir from the organic solvents in crude oil and as an organic colloid, they can adsorb electrolyte ions from aqueous solution. In order to simulate natural conditions we used asphaltenes from local drills, toluene as solvent and several typical oxides and carbonate rock components or minerals as adsorbents. Our study included natural Brazilian quartz, dolomite, calcite and kaolin, as well as pure oxides: Fe 2 O 3 and TiO 2 . The typical shape of asphaltene adsorption isotherms was obtained for all systems studied with the characteristic 'steps' which indicate changes in the state of asphaltene molecules in the solution and at the mineral surface. Those changes are related to the asphaltene association and further formation of hemimicelles and micelles.

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Electrochemical Properties of Asphaltene Particles in Aqueous Solutions

Cited by 22 publications

References 20 publications

An overview of the oil-brine interfacial behavior and a new surface complexation model

An overview of the oil-brine interfacial behavior and a new surface complexation model

Adsorption of asphaltenes from toluene on typical soils of Lublin region

Adsorption of asphaltenes from toluene on mineral surface

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