Fouling mechanisms of asphaltenes and fine solids on bare and electroless nickel-phosphorus coated carbon steel

Gong, Lu; Wang, Jingyi; Zhang, Ling; Fattahpour, Vahidoddin; Mamoudi, Mahdi; Roostaei, Morteza; Fermaniuk, Brent; Luo, Jing‐Li; Zeng, Hongbo

doi:10.1016/j.fuel.2019.04.113

Cited by 11 publications

(7 citation statements)

References 74 publications

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“…The Derjaguin–Landau–Verwey–Overbeek (DLVO) model for colloidal forces ( F dlvo ), which includes van der Waals forces ( F vdw ) and electrical double-layer forces ( F edl ), was used to describe the surface forces acting between the Se 0 probe and Fe(OH) 3 surface. A constant charge DLVO model was applied for the theoretical calculation in the case of a sphere approaching to an infinite flat substrate. ,,, The equations are described as follows where A is the Hamaker constant for the Se 0 probe interacting with Fe(OH) 3 across water, R is the Se 0 probe radius, D is the separation distance between the Se 0 probe and flat Fe(OH) 3 surface, ε is the relative permittivity, ε 0 is the vacuum permittivity, σ T is the probe surface charge density, σ S is the substrate surface charge density, κ is the Debye length, k B is the Boltzmann constant, T is the temperature, C 0 is the bulk concentration of ions, N A is Avogadro’s number, and e is the elementary charge. The surface potential Ψ is correlated to the surface charge density by the Grahame equation (eq ).…”

Section: Methodsmentioning

confidence: 99%

“…A constant charge DLVO model was applied for the theoretical calculation in the case of a sphere approaching to an infinite flat substrate. 35,36,44,45 The equations are described as follows…”

Section: Introductionmentioning

confidence: 99%

“…The effects of water composition and pH on the removal efficiency of Se 0 particles were studied. The surface properties of Fe(OH) 3 and Se 0 particles were characterized, and their intermolecular interactions were quantitatively measured using atomic force microscopy (AFM), which has been successfully employed for probing surface interactions in a variety of colloidal systems. − …”

Section: Introductionmentioning

confidence: 99%

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Understanding the Interaction Mechanism between Elemental Selenium and Ferric Hydroxide in Wastewater Treatment

Wang

Xie

et al. 2020

Ind. Eng. Chem. Res.

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The conversion of selenium oxyanions to elemental selenium (Se0) of low solubility and bioavailability is an effective industrial approach for selenium management in wastewater treatment. The generated Se0 particles require further treatment with coagulants such as ferric ions to facilitate the precipitation of Se0 particles. In this work, the settling of Se0 particles in simulated wastewater was investigated with amorphous ferric hydroxide (Fe(OH)3) as a coagulant prepared from hydrolysis of ferric chloride. The effects of ferric ion dosage, water composition, and pH on the Se0 removal percentage were investigated. The surface properties, i.e., ζ potential and morphology, were characterized, which influenced the interactions between Se0 and Fe(OH)3. The forces acting between Se0 and Fe(OH)3 surfaces were directly measured, for the first time, using atomic force microscopy (AFM). The water composition and pH had a significant effect on the adhesion force. In simulated wastewater, the adhesion force generally increased with pH, suggesting that the adsorption of Ca2+ and Mg2+ on Fe(OH)3 surface increased with pH, which enhanced the adhesion. Interestingly, long-range pull-off forces and sawtooth patterns were observed on the retraction force–separation curves, which were attributed to the stretching of Fe(OH)3 particle aggregates or chains during separation. Bulk settling tests showed that the best Se0 removal performance of Fe(OH)3 was found to be around pH 8, which was because the largest amount of Fe(OH)3 precipitates was found around this pH. The results indicate that the Fe(OH)3 solubility as well as the related intermolecular and surface forces play the predominant role in determining the Se0 removal performance of the ferric coagulant. This work, for the first time, revealed the interaction mechanisms of Se0 particle and amorphous Fe(OH)3, providing useful insights on the performance of ferric coagulants on Se0 particle removal from wastewater under various solution conditions. The experimental approach used in this work can be readily extended to other water treatment systems and processes such as polymer flocculation.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Understanding the Interaction Mechanism between Elemental Selenium and Ferric Hydroxide in Wastewater Treatment

Wang

Xie

et al. 2020

Ind. Eng. Chem. Res.

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“…It is expected that Ni–P coating could also possess antifouling properties in oil production processes, in addition to its corrosion and wear resistance. We have reported the surface interactions of deformable oil droplets and Fe substrate with and without Ni–P coating, as well as the surface interactions and fouling behaviors of fine solids/asphaltenes and carbon steel with and without Ni–P coating . In this work, the intermolecular and surface forces between the typical foulants in heavy oil production of Alberta oil sands (i.e., silica and bitumen-coated silica) and the L80 carbon steel (API grade) substrates with and without Ni–P coating were directly measured using the AFM colloidal probe technique in aqueous solutions.…”

Section: Introductionmentioning

confidence: 99%

“…In this work, the intermolecular and surface forces between the typical foulants in heavy oil production of Alberta oil sands (i.e., silica and bitumen-coated silica) and the L80 carbon steel (API grade) substrates with and without Ni–P coating were directly measured using the AFM colloidal probe technique in aqueous solutions. The bath composition for Ni–P coating was modulated to increase the P content for better corrosion resistance in high salinity solution, as compared with our previous study . The surface properties of L80 with and without Ni–P coating were characterized.…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Antifouling Mechanism of Electroless Nickel–Phosphorus Coating against Sand and Bitumen

et al. 2019

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Antifouling coatings have attracted much attention in applications of industrial equipment and systems. The accumulation of foulants on downhole equipment used in the steam-assisted gravity drainage process for oil sand extraction reduces the recovery efficiency of bitumen and causes failures of the equipment. Applying suitable coatings is expected to endow antifouling property to the related substrate surface. Understanding the interaction mechanism between foulants and antifouling coating is critical for the evaluation and prediction of antifouling performance. In this work, antifouling coating consisting of Ni and P was prepared on the L80 carbon steel substrate, which is a commonly used material in downhole equipment. The surface properties (e.g., morphology and surface energy) of the Ni–P coating and pristine L80 substrates were characterized. The intermolecular and surface forces between typical foulants (e.g., silica and bitumen-coated silica) and Ni–P coated and uncoated L80 substrates were directly measured using the atomic force microscope colloidal probe technique to investigate the fouling mechanisms and predict the fouling behaviors of the foulants at the nanoscale. It was found that the Ni–P coating possessed lower surface energy, weaker attractive van der Waals interaction, and smaller adhesion to both silica and bitumen as compared to the uncoated L80 substrate. Bulk soaking experiments were also conducted accordingly which further demonstrated the antifouling performance of Ni–P coating against silica and bitumen, agreeing well with the surface force measurements. This work has improved the fundamental understanding of fouling behaviors of silica and bitumen and the antifouling mechanism of Ni–P coating at the nanoscale, with potential applications in many related processes in chemical and petroleum industries. The methodologies employed in this work can be readily extended for investigating fouling and antifouling mechanisms of different materials in various engineering fields.

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Soft armour-like layer-protected hydrogels for wet tissue adhesion and biological imaging

Pan

Nguyen

Yang

et al. 2022

Chemical Engineering Journal

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Fouling mechanisms of asphaltenes and fine solids on bare and electroless nickel-phosphorus coated carbon steel

Cited by 11 publications

References 74 publications

Understanding the Interaction Mechanism between Elemental Selenium and Ferric Hydroxide in Wastewater Treatment

Understanding the Interaction Mechanism between Elemental Selenium and Ferric Hydroxide in Wastewater Treatment

Investigation of the Antifouling Mechanism of Electroless Nickel–Phosphorus Coating against Sand and Bitumen

Soft armour-like layer-protected hydrogels for wet tissue adhesion and biological imaging

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