Optimizing micro-foam rheology for soil remediation

Oliveira, Roberto Carlos Goncalves de; Oliveira, José Farias de; Moudgil, Brij M.

doi:10.1007/b97121

Cited by 5 publications

(9 citation statements)

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“…Figure 9 also establishes that w τ ε increases significantly with surfactant concentration for a given value of a γ ε & . This was also observed by Oliveira et al [58]. This cannot be attributed to changes in surface tension since it does not vary significantly over the range of surfactant mass fractions considered (Table 1).…”

Section: Effect Of Surfactant Concentrationsupporting

confidence: 84%

“…They concluded that the pressure drop and the effective viscosity of wet foams flowing in a vertical pipe increased with surfactant concentration [28,47]. Similar results were observed for CGA flowing in horizontal and long capillaries [58].…”

Section: Effect Of Surfactant Concentrationmentioning

confidence: 69%

“…The effect of surfactant concentration on rheological properties of foams and CGA has been considered in a few earlier studies [28,44,47,58]. They concluded that the pressure drop and the effective viscosity of wet foams flowing in a vertical pipe increased with surfactant concentration [28,47].…”

Section: Effect Of Surfactant Concentrationmentioning

confidence: 99%

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Rheology of colloidal gas aphrons (microfoams)

Larmignat

Vanderpool

Lai

et al. 2008

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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This paper reports on the effect of surfactant concentration and pipe shape and size on the rheological properties of colloidal gas aphrons (CGA) or microfoams. CGA consists of closely packed spherical gas bubbles with diameter ranging from 10 to 100 microns surrounded by a surfactant shell. It is produced by stirring an aqueous surfactant solution at high speed in a baffled beaker. Pipe flow experiments were performed in cylindrical pipes with diameter ranging from 1.0 to 3.0 mm under adiabatic laminar flow conditions. The porosity, bubble size distribution, surface tension, and pH were systematically measured. First, it is established that there was no slip velocity at the wall and CGA did not change morphology and porosity between the inlet and outlet of the pipes less than 2 mm in diameter. Compressibility effects were accounted for through the volume equalization approach. Then, pipe shape and diameter have no

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Section: Effect Of Surfactant Concentrationsupporting

confidence: 84%

Section: Effect Of Surfactant Concentrationmentioning

confidence: 69%

See 1 more Smart Citation

Rheology of colloidal gas aphrons (microfoams)

Larmignat

Vanderpool

Lai

et al. 2008

Colloids and Surfaces A: Physicochemical and Engineering Aspect

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“…(17) and (18)). The values of the parameters k v and C of , for all experiments of Table 6, are presented in Table 7, with their respective standard deviation and correlation coefficients.…”

Section: Remediation With Regular Foamsmentioning

confidence: 93%

“…Micro-foams present a higher liquid phase content around the bubbles (30-60%) due to their structure, which contains internal spherical microbubbles. The regular foams present a polyedric structure composed of thin liquid lamellas surrounding the gas phase [17]. Regular foam liquid content is usually below 10%.…”

Section: Introductionmentioning

confidence: 99%

Remediation of sandy soils using surfactant solutions and foams

Couto

Massarani

Biscaia

et al. 2009

Journal of Hazardous Materials

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Stability Modeling of Water‐Based Surfactant Covered Micro‐bubble Fluids

Alizadeh

Khamehchi

2015

J Surfact & Detergents

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Currently, due to the decrease in easy access to crude oil reservoirs, oil and gas industries have focused on production from heavy oil and depleted reservoirs. In recent years, micro‐bubble fluids with surfactant and polymer layers around the bubbles are investigated as a part of drilling fluids and their positive effect on the formation damage is proven. Stability of the bubbles in the fluid is very important, and the optimum surfactant and polymer types should be chosen at optimum concentrations. In this work, an attempt is made to analyze the stability of bubbles of the drilling fluid, based on the diffusive mass transfer concept. Mass transfer and interfacial mass transfer coefficients become more important when surfactant concentration gradient exists in micro‐bubble layers. Interfacial mass transfer coefficients have an important effect on mass transfer phenomena in Aphron fluids system; so, the precise selection of these coefficients results in the conformity of modeling and experiments. We can say that reducing the mass transfer rate from bubble layers will result in stable bubbles in the fluid and, thus, the efficiency of the fluid during drilling will not decrease. It is shown that the interfacial mass transfer coefficient decreases with an increase in surfactant concentration.

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Optimizing micro-foam rheology for soil remediation

Cited by 5 publications

References 0 publications

Rheology of colloidal gas aphrons (microfoams)

Rheology of colloidal gas aphrons (microfoams)

Remediation of sandy soils using surfactant solutions and foams

Stability Modeling of Water‐Based Surfactant Covered Micro‐bubble Fluids

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