Theoretical and Experimental Study of Gas Bubbles Behavior

Mândrea, Lucian; Oprina, Gabriela; Chihaia, Oprina; El-Leathey, Lucia-Andreea; Mirea, Radu

doi:10.7763/ijmo.2017.v7.574

Cited by 9 publications

(3 citation statements)

References 19 publications

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“…8), it can be concluded that the average bubble diameter gradually decreases with the increase in temperature below 35°C. This is when the surface tension decreases due to the increase in temperature, and according to Mandrea et al [26] , it was demonstrated that the bubble diameter is proportional to the surface tension of water as follows.…”

Section: Fig 4 Photographs Of Bubbles Taken At Different Condensate C...mentioning

confidence: 99%

Experimental Study of Condensate Vaporization into Bubbles under Different Operating Parameters

Wang,

Lü,

Song

et al. 2023

J. Phys.: Conf. Ser.

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Produced water (PW) is a natural by-product of the oil and gas production process, where crude oil is dispersed in the form of micron-sized emulsified droplets in the produced water due to mixing between crude oil and water caused by equipment, piping and valve shear action. Flotation is the main method for treating emulsified oil droplets in oilfield produced water. The conventional flotation technology suffers from a series of problems such as large reflux ratio and poor flotation effect, thus limiting its further application. In this paper, bubbles are prepared by vaporization of low boiling point condensate through theoretical analysis and experimental study. In this paper, the law of bubble generation from condensate solution at different temperatures after decompression and release is investigated. The results demonstrate that the median particle size of gas bubbles generated from condensate is related to the condensate content, mixing pressure, release pressure, and temperature. The median particle size can reach 9.65 μm when mixed at 2.0% condensate content, 0.2 MPa mixing pressure, and 35°C, and released at atmospheric pressure, which is much smaller than the size of gas bubbles generated by dissolved air flotation. The condensate bubbles as alkane congeners are more likely to adhere to the oil droplets in the extracted water, which is conducive to improving the air flotation oil removal efficiency of oily wastewater.

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Section: Fig 4 Photographs Of Bubbles Taken At Different Condensate C...mentioning

confidence: 99%

Experimental Study of Condensate Vaporization into Bubbles under Different Operating Parameters

Wang,

Lü,

Song

et al. 2023

J. Phys.: Conf. Ser.

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“…Bubble formation has a greater impact on pressure drop than the droplet interface. Since the viscosity of the organic and aqueous phases differs significantly, the pressure drop caused by friction on the aqueous phase has the least impact on the total pressure drop [12].…”

Section: Pressure Dropmentioning

confidence: 99%

Evaluating the Application of Bubble Wet Scrubber Systems for Gas Cleaning in Gasification

Joni¹,

Numberi²,

Tambing³

et al. 2023

I2M

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The removal of alkaline chemicals, particulates, and other impurities from syngas is a challenge in the biomass gasification process. Wet scrubbers are frequently used to clean the industrial exhaust gases before being released into the atmosphere. Cleaning fluid is sprayed or pumped through the apertures and comes in touch with the gas to be cleaned of most wet scrubbers. Therefore, this paper proposes a new technology that uses a bubble wet scrubber system to flow syngas at a constant height into a pool of cleaning water. The syngas will come into direct contact with the cleaning water to form bubbles containing gas and other impurities that are absorbed mostly by the cleaning water. The objective of this study is to develop a simple and cost-effective bubble system scrubber and investigate its impact on the scrubber's performance for tar removal from biomass gasification. The results show that 2.6 L of cleaning water can remove particles and tar from syngas with an 83.26% efficiency.

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“…These reductions will facilitate breakup of droplets and bubbles and, thereby, reduce the separation. Mândrea et al studied the generation of gas bubbles by orifices in a water column and showed that the bubble diameter is directly proportional to the surface tension of water. Sadeghi and Vissers showed that the increase of the temperature slightly reduces the size of the bigger bubbles, while it has no significant effect on smaller bubbles.…”

Section: Microscopic Aspects Of Gas Flotationmentioning

confidence: 99%

Gas Flotation of Petroleum Produced Water: A Review on Status, Fundamental Aspects, and Perspectives

et al. 2020

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Produced water is a major byproduct in oil production and the largest waste stream generated in the petroleum industry. At the Norwegian Continental Shelf, produced water is still mostly discharged to the sea, but some installations re-inject produced water into the reservoir for pressure support or disposal. Gas flotation is a separation technology widely used both onshore and offshore that generally reduces the oil concentration to <25 ppmv. It is also a promising technology for subsea water treatment. The aim of this review is to give an overview and provide a link between the industrial use and the fundamental aspects of gas flotation. The industrial analysis examines the development and design of gas flotation technologies: induced, dissolved, and compact flotation units. Several aspects of subsea water separation are also discussed. The fundamental aspects are dedicated to the fluid dynamics of bubble−droplet collisions and the phenomena involved after their encounter, i.e., film drainage, forces involved in this process, and spreading of oil on the surface of gas bubbles. Moreover, a detailed analysis of parameters that can affect gas flotation, like gas bubble and oil droplet sizes, droplet−bubble attachment mechanisms, interfacial properties, water composition, oil and gas properties, pressure, and temperature, is provided.

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Theoretical and Experimental Study of Gas Bubbles Behavior

Cited by 9 publications

References 19 publications

Experimental Study of Condensate Vaporization into Bubbles under Different Operating Parameters

Experimental Study of Condensate Vaporization into Bubbles under Different Operating Parameters

Evaluating the Application of Bubble Wet Scrubber Systems for Gas Cleaning in Gasification

Gas Flotation of Petroleum Produced Water: A Review on Status, Fundamental Aspects, and Perspectives

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