Effect of chemical structure of organics on pore wetting

Li, Xingxun; Fan, Hui; Fan, Xianfeng

doi:10.1016/j.ces.2015.06.063

Cited by 17 publications

(9 citation statements)

References 51 publications

(63 reference statements)

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“…Clean glass interior surfaces are of importance for the experiments since any contamination could cause alterations of wettability and adsorption behaviors . Cleaning methods used in our previous work were employed to clean the microsized glass pore interiors before measurements. − ,, Nitric acid and sodium hydroxide solutions and acetone were used to rinse the microsized capillaries. Finally, the capillaries were thoroughly washed by DI water.…”

Section: Methodsmentioning

confidence: 99%

“…Our recent studies have proved that the experimental data in confined micropores can represent the transport phenomena of reservoir fluids within porous medium more appropriately than the data measured on planar surfaces in an open space. 22,23 Recently, we have made direct pore-scale visualization on the growth kinetics of asphaltene particles in a microsized pore and compared the results with the ones obtained on a flat surface in an open space. 24,25 Xu et al (2017) used microchannel devices to study the dynamic stability of emulsion by investigating the influence of surfactants and nanoparticles.…”

Section: Introductionmentioning

confidence: 99%

“…27 Cleaning methods used in our previous work were employed to clean the microsized glass pore interiors before measurements. [22][23][24][25]28,29 Nitric acid and sodium hydroxide solutions and acetone were used to rinse the microsized capillaries. Finally, the capillaries were thoroughly washed by DI water.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Nanoparticles on Asphaltene Aggregation in a Microsized Pore

Guo

Sun

et al. 2018

Ind. Eng. Chem. Res.

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During oil recovery process, the equilibrium state of asphaltene−oil solution system and colloidal system in porous media is altered, which could cause asphaltene to precipitate from crude oil in rock pores. This severely results in the alteration of wettability, permeability, and porosity of formation and damages oil reservoir formation. Nanoparticles have recently been considered as effective asphaltene inhibitors. Several experimental works were carried out to study the impact of nanoparticles on asphaltene precipitation. The majority of these studies were performed using coreflooding experiments in bulk phase. However, few experimental investigations were performed to directly reveal the impact of nanoparticles on asphaltene aggregation based on the direct pore-scale visual evidence. In this work, a novel method was employed to make direct visualization and measurement on the kinetics of asphaltene aggregation in the presence of nanoparticles in a microcapillary. NiO, SiO 2 , and Fe 3 O 4 nanoparticles were used. We directly measured the diameter and number and analyze size distribution of asphaltene aggregate particles in a microsized pore. The results indicate that the nanoparticles can significantly inhibit the aggregation of asphaltene particles in a microsized pore due to adsorption of asphaltene particles onto nanoparticle surfaces. The effect of nanoparticle concentration was investigated. Higher concentration of nanoparticles could contribute to the inhibition of aggregation of asphaltene particles. The asphaltene precipitation and aggregation can be prevented more effectively at higher concentration of asphaltene precipitant in the presence of nanoparticles.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effect of Nanoparticles on Asphaltene Aggregation in a Microsized Pore

Guo

Sun

et al. 2018

Ind. Eng. Chem. Res.

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“…That is, how to map the highly irregular shape of pore channels, which consist of convex‐ and concave‐curved surface areas to a rectangular geometry of a square capillary. Complete wetting . The theoretical treatment assumes unrealistic complete wetting (zero contact angle) for the glass beads (the fluid was pentane and not water; the contact angle of pentane on glass is about 30°; Li et al, ). It has been shown that contact angles on glass surfaces using standard cleaning methods lie between 15° and 30° (Iglauer et al, ) and that heterogeneous wetting properties can have a significant influence on capillary trapping (Geistlinger & Ataei‐Dadavi, ). Roundness factor .…”

Section: Introductionmentioning

confidence: 99%

Evaporation Study Based on Micromodel Experiments: Comparison of Theory and Experiment

Geistlinger

Ding

Apelt

et al. 2019

Water Resources Research

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Evaporation—a key process for water exchange between soil and atmosphere—is controlled by internal water fluxes and surface vapor fluxes. Recent studies demonstrated that the dynamics of the water flow in corners determine the time behavior of the evaporation rate. The internal water flux of the porous media is often described by capillary flow assuming complete wetting. Particularly, the crucial influence of partial wetting, that is, the nonlinear contact angle dependency of the capillary flow has been neglected so far. The focus of the paper is to demonstrate that SiO2‐surfaces can exhibit contact angles of about 40°. This reduces the internal capillary flow by 1 order of magnitude compared to complete wetting. First, we derived the contact angle by inverse modeling. We conducted a series of evaporation experiments in a 2‐D square lattice microstructure connected by lognormal distributed throats. We used an explicit analytical power series solution of the single square capillary model. A contact angle of 38° ± 1° was derived. Second, we directly measured the contact angle of the Si‐SiO2 wafer using the Drop Shape Analyzer Krüss 100 and obtained an averaged contact angle of 42° ± 2°. The results support the single square capillary model as an appropriate model for the description of the evaporation process in an ideal square capillary.

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“…Acid−Base Resistance. The samples were immersed in solution with various pH values (1,3,5,7,8,10,12,14) for a series of time steps (1,3,5,12,24,48, 96 h). The acid and base solutions were buffer solutions, and the neutral solution was doubly distilled water.…”

Section: Methodsmentioning

confidence: 99%

Fabrication of Tunable, Stable, and Predictable Superhydrophobic Coatings on Foam Ceramic Materials

Yan

et al. 2016

Ind. Eng. Chem. Res.

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Superhydrophobic foam ceramic materials can be used as distillation column internals, and surface wettability has a remarkable influence on column trays. There are no existing methods for industrial fabrication of superhydrophobic surfaces on foam ceramic materials. This paper presents a facile method for fabricating stable superhydrophobic or hydrophobic coatings on the outside and inside of foam SiC materials with submicrometer silica particles, for dip-coating, and alkylchlorosilane, for surface reaction. Scanning electron microscopy, atomic force microscopy, dynamic light scattering methods, and Fourier transform infrared spectroscopy were employed to study the physical and chemical details. The contact angle of coatings can be tuned to 155°, 140°, 125°, and 95° by adapting coating times and particle size. Superhydrophobic surfaces presented excellent stability under various conditions. In addition, a theoretical prediction strategy by surface microscopic morphology and surface chemical composition based on the Cassie–Baxter model was also presented. Briefly, this paper presents the possibility for large-scale preparation of superhydrophobic coatings on foam ceramic materials.

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Effect of chemical structure of organics on pore wetting

Cited by 17 publications

References 51 publications

Effect of Nanoparticles on Asphaltene Aggregation in a Microsized Pore

Effect of Nanoparticles on Asphaltene Aggregation in a Microsized Pore

Evaporation Study Based on Micromodel Experiments: Comparison of Theory and Experiment

Fabrication of Tunable, Stable, and Predictable Superhydrophobic Coatings on Foam Ceramic Materials

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