Effects of monovalent anions and cations on drainage and lifetime of foam films at different interface approach speeds

Firouzi, Mahshid; Nguyen, Anh V.

doi:10.1016/j.apt.2014.06.004

Cited by 53 publications

(37 citation statements)

References 32 publications

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“…Thin liquid film interferometry with the experimental setup outlined in (Firouzi and Nguyen, 2014a; was utilized to study the effect of salts on bubble coalescence. The necessary details of the experimental setup are explained as follows.…”

Section: Experimental Methodsmentioning

confidence: 99%

“…Quinn et al (2014b), 1.CCC95 and 2.CCC75 the concentration at which D32 (the Sauter mean diameter) is reduced by 95% and 75% respectively from that in water to D32 as the salt concentration goes to j. Zahradnı́k et al (1999) k. Firouzi and Nguyen (2014a) l. Castro et al (2012) ∞ Table 2.2. Bubble radius and the TC95 of NaCl determined based on the data available in the literature for aqueous NaCl solutions.…”

Section: Comparison Of Transition Concentrations Of Saltsmentioning

confidence: 99%

“…Recently a systematic study considering the combined effects of salt concentration, interface approach speed and salt type on the lifetime, thinning rate (change of the film thickness) and growth rate (change of the radius) of the liquid films of salt solutions was reported (Firouzi and Nguyen, 2014a of salts followed the reverse order of that for film lifetime, and it was shown that the transition concentration was independent of bubble approach speed in the investigated range of 10-300 µm/s.…”

Section: Effect Of Salts On Bubble Coalescencementioning

confidence: 99%

“…To date few studies have been conducted on saline liquid films using the thin liquid micro-interferometric technique (Firouzi and Nguyen, 2014a;Henry et al, 2009;. The results showed that inhibiting salts increase the lifetime of liquid films at concentrations above the transition.…”

Section: Thin Liquid Film Micro-interferometrymentioning

confidence: 99%

“…, 2) contacting a pair of bubbles and determining the percentage of coalescence by counting the number of coalescing bubbles compared to the total number of contacted bubbles ) and 3) measuring the lifetime of the thin liquid film of salt solutions between bubbles using an optical interferometric method (Firouzi and Nguyen, 2014a;. Electric double layer repulsions (Miklavcic, 1996), hydration repulsions Tsao and Koch, 1994), the Gibbs-Marangoni effect , gas solubility and hydrophobic attractions (Craig et al, 1999;Nguyen and Nguyen, 2009; have been proposed to explain the inhibition of bubble coalescence in salt solutions.…”

Section: Acknowledgmentsmentioning

confidence: 99%

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Drainage and stability of foam films during bubble coalescence in aqueous salt solutions

Firouzi¹

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Bubble coalescence and thin liquid films (TLFs) between bubbles known as foam films, are central to many daily activities, both natural and industrial. They govern a number of important processes such as foam fractionation, oil recovery from tar sands and mineral recovery by flotation using air bubbles. TLFs are known to be stabilized by some salts and bubble coalescence in saline water can be inhibited at salt concentrations above a critical (transition) concentration. However, the mechanisms of the inhibiting effect of these salts are as yet contentious. The aim of this work is to characterise the behaviour of saline liquid films both experimentally and theoretically to better understand the mechanisms.The effect of sodium halide and alkali metal salts including NaF, NaBr, NaI, NaCl, KCl and LiCl on the stability of a foam film was investigated by applying the TLF interferometry method. To mimic realistic conditions of bubble coalescence in separation processes, the drainage and stability of TLFs were studied under non-zero bubble (air-liquid interface) approach speeds (10-300 µm/s) utilizing a nano-pump. For each of the salts studied, a critical concentration (Ccr) above which liquid films lasted for up to 50 s depending on the salt type, concentration and the interface approach speed, was determined. For concentrations below Ccr, the saline liquid films either ruptured instantly or lasted for less than 0.2 s. Ccr follows the order NaF

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Section: Experimental Methodsmentioning

confidence: 99%

Section: Comparison Of Transition Concentrations Of Saltsmentioning

confidence: 99%

Section: Effect Of Salts On Bubble Coalescencementioning

confidence: 99%

Section: Thin Liquid Film Micro-interferometrymentioning

confidence: 99%

Section: Acknowledgmentsmentioning

confidence: 99%

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Drainage and stability of foam films during bubble coalescence in aqueous salt solutions

Firouzi¹

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Therapeutic cobalt ion incorporated in poly(vinyl alcohol)/bioactive glass scaffolds for tissue engineering

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Effects of water salinity on the foam dynamics for EOR application

Rudyk

Al-Khamisi

Al-Wahaibi

2021

J Petrol Explor Prod Technol

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Factors limiting foam injection for EOR application are exceptionally low rock permeability and exceedingly high salinity of the formation water. In this regard, foam formation using internal olefin sulfonate is investigated over a wide salinity range (1, 5, 8, 10, and 12% NaCl) through 10 mD limestone. The relationships between pressure drop (dP), apparent viscosity, liquid flow rate, total flow rate, salinity, foam texture, and length of foam drops at the outlet used as an indicator of viscosity are studied. Foaming is observed up to 12% NaCl, compared to a maximum of 8% NaCl in similar core-flooding experiments with 50 mD limestone and 255 mD sandstone. Thus, the salinity limit of foam formation has increased significantly due to the low permeability, which can be explained by the fact that the narrow porous system acts like a membrane with smaller holes. Compared to the increasing dP reported for highly permeable rocks, dP linearly decreases in almost the entire range of gas fraction (fg) at 1–10% NaCl. As fg increases, dP at higher total flow rate is higher at all salinities, but the magnitude of dP controls the dependence of apparent viscosity on total flow rate. Low dP is measured at 1% and 10% NaCl, and high dP is measured at 5, 8, and 12% NaCl. In the case of low dP, the apparent viscosity is higher at higher total flow rate with increasing gas fraction, but similar at two total flow rates with increasing liquid flow rate. In the case of high dP, the apparent viscosity is higher at lower total flow rate, both with an increase in the gas fraction and with an increase in the liquid flow rate. A linear correlation is found between dP or apparent viscosity and liquid flow rate, which defines it as a governing factor of foam flow and can be considered when modeling foam flow.

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Effects of monovalent anions and cations on drainage and lifetime of foam films at different interface approach speeds

Cited by 53 publications

References 32 publications

Drainage and stability of foam films during bubble coalescence in aqueous salt solutions

Drainage and stability of foam films during bubble coalescence in aqueous salt solutions

Therapeutic cobalt ion incorporated in poly(vinyl alcohol)/bioactive glass scaffolds for tissue engineering

Effects of water salinity on the foam dynamics for EOR application

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