Kinetics of ultrasonically induced coalescence within oil/water emulsions: Modeling and experimental studies

Pangu, Gautam D.; Feke, Donald L.

doi:10.1016/j.ces.2008.12.004

Cited by 37 publications

(30 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…It should be noted that coalescence occurs only when the cavity is in resonance. Important studies about this ultrasonic application can be found in the literature, such as the ultrasonic separation of suspended particulates (Benes et al, 2001) and the kinetic study of the coalescence of water in oil emulsions (Pangu and Feke, 2009). This paper presents the design of an ultrasonic chamber to be applied in the water/oil separation.…”

Section: Introductionmentioning

confidence: 99%

Design and Implementation of the Frequency Control in an Ultrasonic Break Water-in-Oil Emulsion Chamber

Atehortua¹,

Pérez²,

Andrade³

et al. 2015

Physics Procedia

View full text Add to dashboard Cite

Water-in-oil emulsions present high stability and its separation is commonly accelerated by addition of chemical demulsifiers or using electrostatic techniques. An alternative to reduce the amount of demulsifiers is the use of ultrasonic standing waves. In this work, the design and implementation of an ultrasonic demulsifier system operating in the 1 MHz range is presented. The design includes the ultrasonic resonant chamber, the power electronics to drive the piezoelectric transducers and the control system. The control must track the operating frequency, compensating the changes due to temperature variation. The system was evaluated in a laboratory pipeline showing that the use of ultrasound reduces the final water content in all cases.

show abstract

Section: Introductionmentioning

confidence: 99%

Design and Implementation of the Frequency Control in an Ultrasonic Break Water-in-Oil Emulsion Chamber

Atehortua¹,

Pérez²,

Andrade³

et al. 2015

Physics Procedia

View full text Add to dashboard Cite

show abstract

“…Meanwhile, they indicated that acoustic intensity was more important than other factors. As to the microcosmic mechanism, current researches are mainly about the characteristics of cavitation bubbles under ultrasonic field, while few works reported the mechanism of ultrasonic demulsification [20][21][22][23][24][25][26][27]. However, the physical properties between oil-water system and gas-liquid system are significantly different.…”

Section: Introductionmentioning

confidence: 99%

An experimental study on the motion of water droplets in oil under ultrasonic irradiation

Luo

Wang³

et al. 2016

Ultrasonics Sonochemistry

View full text Add to dashboard Cite

The motion of a single water droplet in oil under ultrasonic irradiation is investigated with high-speed photography in this paper. First, we described the trajectory of water droplet in oil under ultrasonic irradiation. Results indicate that in acoustic field the motion of water droplet subjected to intermittent positive and negative ultrasonic pressure shows obvious quasi-sinusoidal oscillation. Afterwards, the influence of major parameters on the motion characteristics of water droplet was studied, such as acoustic intensity, ultrasonic frequency, continuous phase viscosity, interfacial tension, and droplet diameter, etc. It is found that when the acoustic intensity and frequency are 4.89 W cm(-2) and 20 kHz respectively, which are the critical conditions, the droplet varying from 250 to 300 μm in lower viscous oil has the largest oscillation amplitude and highest oscillation frequency.

show abstract

“…Most kinds of industrial wastewater contain O/W emulsions among their basic contaminants [4]. Various physical methods are used for oil-water separation, such as gravity separation, parallel-plate separation [5], air flotation [6], hydrocyclone separation [7], centrifugal separation [8], filtration [9], micro-and ultrafiltration [10,11], electric field separation [1,12], ultrasonic separation [13,14], and membrane separation [15,16]. These methods can separate free and dispersed oil droplets in wastewater efficiently and economically.…”

Section: Introductionmentioning

confidence: 99%

Effect of the Mixed Oleophilic Fibrous Coalescer Geometry and the Operating Conditions on Oily Wastewater Separation

Yang

et al. 2016

Chem Eng & Technol

View full text Add to dashboard Cite

Fibrous-bed coalescers are commonly used to separate oil-in-water emulsions, and some factors significantly affect the separation performance. To achieve a fundamental understanding of the colloidal physical phenomenon and to predict the coalescence efficiency are challenging tasks because of the complex interplay among the governing parameters. Here, two types of commercial oleophilic fibers were employed to study the influence of critical factors on the separation performance, including the packing density, the specific surface area, the bed depth, the superficial velocity, and the inlet oil content. An industrial-scale experiment was also carried out on an offshore platform. The collected industrial data will be useful to further the application of the oleophilic-fiber bed in oily wastewater treatment.

show abstract

Kinetics of ultrasonically induced coalescence within oil/water emulsions: Modeling and experimental studies

Cited by 37 publications

References 7 publications

Design and Implementation of the Frequency Control in an Ultrasonic Break Water-in-Oil Emulsion Chamber

Design and Implementation of the Frequency Control in an Ultrasonic Break Water-in-Oil Emulsion Chamber

An experimental study on the motion of water droplets in oil under ultrasonic irradiation

Effect of the Mixed Oleophilic Fibrous Coalescer Geometry and the Operating Conditions on Oily Wastewater Separation

Contact Info

Product

Resources

About