Effects of Brine Composition on the Adsorption of Benzoic Acid on Calcium Carbonate

Zeng, Huang; Zou, Fenglou; Horváth‐Szabó, Géza; Andersen, Simon Ivar

doi:10.1021/ef300165m

Cited by 15 publications

(9 citation statements)

References 23 publications

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“…In this regard, four aqueous solution containing Na + and Cl − ions were considered in the present study: deionized water (DW), dilute seawater (dSW; 30,000 ppm), seawater (SW; 60,000 ppm) and high salinity brine (HS; 210,000 ppm). Benzoic acid (BA), as a simple aromatic polar hydrocarbon with enough solubility in water, is selected as a proper candidate to simultaneously mimic both polar and aromatic components of crude oil which mostly include carboxylic acids, asphaltenes and resins 61 . In this manner, the main focus in this study is to specifically explore the impact of salinity on the adsorption of neutral polar compounds, as a constituent in brine, onto calcite surface.…”

Section: Methodsmentioning

confidence: 99%

Atomistic insight into salinity dependent preferential binding of polar aromatics to calcite/brine interface: implications to low salinity waterflooding

Koleini

Badizad

Mahani

et al. 2021

Sci Rep

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This paper resolve the salinity-dependent interactions of polar components of crude oil at calcite-brine interface in atomic resolution. Molecular dynamics simulations carried out on the present study showed that ordered water monolayers develop immediate to a calcite substrate in contact with a saline solution. Carboxylic compounds, herein represented by benzoic acid (BA), penetrate into those hydration layers and directly linking to the calcite surface. Through a mechanism termed screening effect, development of hydrogen bonding between –COOH functional groups of BA and carbonate groups is inhibited by formation of a positively-charged Na+ layer over CaCO3 surface. Contrary to the common perception, a sodium-depleted solution potentially intensifies surface adsorption of polar hydrocarbons onto carbonate substrates; thus, shifting wetting characteristic to hydrophobic condition. In the context of enhanced oil recovery, an ion-engineered waterflooding would be more effective than injecting a solely diluted saltwater.

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Section: Methodsmentioning

confidence: 99%

Atomistic insight into salinity dependent preferential binding of polar aromatics to calcite/brine interface: implications to low salinity waterflooding

Koleini

Badizad

Mahani

et al. 2021

Sci Rep

View full text Add to dashboard Cite

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“…Benzoic acid is a proper candidate for mimicking a polar fraction of crude oil, having enough solubility in water to, in effect, be able to adhere on minerals in aqueous solutions. ,, The saline brine in carbonate reservoirs is known to be buffered to a basic pH, normally at 8. , At such a basic condition, it is expected that carboxylic acids (with pK a = 4.2) are largely deprotonated to the carboxylate (−COO – ) form . This is the reason behind the selection of benzoate, rather than benzoic acid.…”

Section: Methodsmentioning

confidence: 99%

The Impact of Salinity on the Interfacial Structuring of an Aromatic Acid at the Calcite/Brine Interface: An Atomistic View on Low Salinity Effect

et al. 2019

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This study aims to elucidate the impact of salinity on the interactions governing the adsorption of polar aromatic oil compounds onto calcite. To this end, molecular dynamics simulations were employed to assess adsorption of a model polar organic molecule (deprotonated benzoic acid, benzoate) on the calcite surface in NaCl brines of different concentration levels, namely, deionized water (DW), low-salinity water (LS, 5000 ppm), and sea water (SW; 45,000 ppm). Calcite was found to be completely covered by several wellordered water layers. The top hydration layer is very compact and prevents direct adsorption of benzoates onto the substrate. Instead, Na + ions form a distinct positively charged layer by adhering on the calcite substrate through inner-sphere complexion mode. Cl − ions mostly lodge on top of the adsorbed sodium cations, forming a negatively charged layer. The distribution of ions at the calcite/brine interface thus exhibits the features of an electrical double layer, composed of a Stern-like positive layer followed by a negative one. The positive charged layer attracts benzoates toward the surface. As such, the sodium ions attached onto the calcite can act as adsorption sites to connect benzoates to the surface. By increasing the salinity, more Na + ions adsorb onto the calcite surface, and the density of benzoate molecules at the interface is enhanced as a result of more Na + bridging ions. The monotonic salinity-dependent adsorption of benzoate molecules on calcite offers a mechanism driving additional oil recovery upon injection of diluted brine into subsurface carbonate reservoirs.

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“…The reservoir environment can be characterized as either: (i) water-wet (water droplet contact angle, θ = 0 • to~70 • ); (ii) oil-wet (θ =~110 • to~180 • ); and (iii) neutrally-wet (θ =~70 • to~110 • ) exhibiting a similar affinity to both water and oil [3][4][5]. While it is understood that most reservoir environments were initially water-wet, the reservoir rock can evolve to become more oil-wet due to the deposition/adsorption of several indigenous organic polar species (asphaltenes, resins and naphthenic acids) present in crude oil [6][7][8][9]. For oil-wet reservoirs, oil recovery is poor due to no capillary imbibition.…”

Section: Introductionmentioning

confidence: 99%

Interfacial and Colloidal Forces Governing Oil Droplet Displacement: Implications for Enhanced Oil Recovery

Tangparitkul

Charpentier

Pradilla

et al. 2018

Colloids and Interfaces

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Growing oil demand and the gradual depletion of conventional oil reserves by primary extraction has highlighted the need for enhanced oil recovery techniques to increase the potential of existing reservoirs and facilitate the recovery of more complex unconventional oils. This paper describes the interfacial and colloidal forces governing oil film displacement from solid surfaces. Direct contact of oil with the reservoir rock transforms the solid surface from a water-wet to neutrally-wet and oil-wet as a result of the deposition of polar components of the crude oil, with lower oil recovery from oil-wet reservoirs. To enhance oil recovery, chemicals can be added to the injection water to modify the oil-water interfacial tension and solid-oil-water three-phase contact angle. In the presence of certain surfactants and nanoparticles, a ruptured oil film will dewet to a new equilibrium contact angle, reducing the work of adhesion to detach an oil droplet from the solid surface. Dynamics of contact-line displacement are considered and the effect of surface active agents on enhancing oil displacement discussed. The paper is intended to provide an overview of the interfacial and colloidal forces controlling the process of oil film displacement and droplet detachment for enhanced oil recovery. A comprehensive summary of chemicals tested is provided.

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Effects of Brine Composition on the Adsorption of Benzoic Acid on Calcium Carbonate

Cited by 15 publications

References 23 publications

Atomistic insight into salinity dependent preferential binding of polar aromatics to calcite/brine interface: implications to low salinity waterflooding

Atomistic insight into salinity dependent preferential binding of polar aromatics to calcite/brine interface: implications to low salinity waterflooding

The Impact of Salinity on the Interfacial Structuring of an Aromatic Acid at the Calcite/Brine Interface: An Atomistic View on Low Salinity Effect

Interfacial and Colloidal Forces Governing Oil Droplet Displacement: Implications for Enhanced Oil Recovery

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