Intensification of mass transfer controlled processes at the interface between two immiscible liquids by an axial turbulent submerged jet

Sedahmed, G.H.; Abdo, M.S.E.; Hassan, M. S.; Konsowa, A.H.

doi:10.1016/j.cep.2006.04.001

Cited by 5 publications

(2 citation statements)

References 21 publications

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“…It would be instructive to compare the present data with previous mass transfer data in the literature; Sedahmed et al (2007) studied the rate of mass transfer at the interface between an aqueous layer and a mercury pool upon which an axial turbulent jet was impinging, under the conditions: 3000 ≤ Re n ≤ 25000, 1740 ≤ Sc ≤ 2565, 3 ≤ H/d n ≤ 24 5.5 ≤ d/dn ≤ 22, and Their data were correlated by the equation: The higher Re dependency obtained in this study compared to a lower value in our work may be attributed to the additional effects induced by using a deformable mercury pool target, such as the formation of a cavity at the impingement location and oscillation of the cavity surface along with the rest of mercury surface.…”

Section: Resultsmentioning

confidence: 80%

Experimental study of the diffusion-controlled corrosion of copper in the bottom of a jet stirred reactor

Helal

Farag

Mansour

et al. 2018

Braz. J. Chem. Eng.

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Jet stirred tank reactors are usually preferred to mechanically stirred tank reactors in the case of high pressure stirred tank reactors in order to avoid the mechanical problems inherent with mechanically agitated reactors. Owing to the impact force exercised by the fluid jet on the tank bottom, the tank bottom is subjected to severe corrosion. The aim of the present work is to address this problem using an accelerated system which simulates natural diffusioncontrolled corrosion of metals. Diffusion-controlled corrosion of a fixed copper disc, at the bottom of a cylindrical tank, under a single phase forced jet flow of acidified dichromate solution was investigated. Variables studied were: physical properties of the solution, solution velocity through different diameters of jet nozzle, distance between the jet outlet nozzle and the copper disc surface; and the effect of using a drag reducing polymer. An overall correlation was obtained: Sh = 0.579 Sc 0.33 Re 0.975 (h/d) 0.049 valid for 850 < Sc < 1322, 1852 < Re < 5000 and 0.3 < h/d < 1.2. Addition of polyethylene oxide as a drag reducing polymer was found to diminish the rate of corrosion under single phase forced jet flow by an amount depending on the operation conditions.

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Section: Resultsmentioning

confidence: 80%

Experimental study of the diffusion-controlled corrosion of copper in the bottom of a jet stirred reactor

Helal

Farag

Mansour

et al. 2018

Braz. J. Chem. Eng.

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show abstract

“…This can reduce the cost of operation [20][21][22]. A turbulent jet is a powerful tool for enhancing mass transfer at the interface between immiscible liquids due to high local rates of energy of dissipation [23][24][25] and plate separators are effective apparatus for the separation of dispersed feed which allows the droplets to coalesce on the inclined plate [26]. The inclined plates extractor-separator combines mass transfer through turbulent jets, which produce high relative velocities between the two phases, and separation by the inclined plate.…”

Section: Introductionmentioning

confidence: 99%

Development of an Inclined Plate Extractor-Separator for Immiscible Liquids

et al. 2009

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Abstract:A new inclined plates extractor-separator is developed for operation with immiscible liquids in which extraction and separation is achieved in one unit contrary to mixer settlers. The inclined plates extractor-separator combines turbulent jets for contacting, and an inclined plate for separation of the two phases. The inclined plates extractor-separator does not have any moving part inside the vessel. This feature makes it free from the mechanical problems associated with conventional apparatus. The proposed inclined plates extractor-separator was operated in batch mode under various operating conditions to evaluate its performance on the basis of extraction efficiency. Water (light phase) was used as solvent to extract ethyl acetate from a heavy phase pool of tetrachloroethylene and ethyl acetate. The ethyl acetate content was analysed using chromatography. A hydrodynamic study was carried out using high speed photography to understand the mechanisms occurring during mass transfer across the two phases. Furthermore, it was found that the proposed inclined plate extractor-separator reduces the overall operating time by 67% and consumes only 13% of the power in comparison to a mixer-settler. A hydraulic power consumption comparison with a mixer settler and a gullwing extractor-separator is also presented.

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Effect of free swirl flow on the rate of mass and heat transfer at the bottom of a vertical cylindrical container and possible applications

Konsowa

Abdel‐Aziz

Abdo

et al. 2017

Applied Thermal Engineering

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Intensification of mass transfer controlled processes at the interface between two immiscible liquids by an axial turbulent submerged jet

Cited by 5 publications

References 21 publications

Experimental study of the diffusion-controlled corrosion of copper in the bottom of a jet stirred reactor

Experimental study of the diffusion-controlled corrosion of copper in the bottom of a jet stirred reactor

Development of an Inclined Plate Extractor-Separator for Immiscible Liquids

Effect of free swirl flow on the rate of mass and heat transfer at the bottom of a vertical cylindrical container and possible applications

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