Effects of surface-active agents on drop size in liquid-liquid systems

Skelland, A. H. P.; Slaymaker, E.

doi:10.1021/ie00099a030

Cited by 17 publications

(6 citation statements)

References 19 publications

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“…It can be seen that the correction factors varied from 0.73-0.83 and corresponded to a range from 0.13-0.3 of dimensionless parameters. The plotted curve best fit into a polynomial equation and was in agreement with the works by various authors (Lando & Oakley, 1967;Wilkinson & Kidwell, 1971;Skelland & Slaymaker, 1990;Pu & Chen, 2001). It should be noted that the correction factors were calculated based on the assumption that the drop size residues govern the same contact angle with the tip as that of the drops related to the maximum volume that could be supported by the tip itself.…”

Section: Drop Weight Analysissupporting

confidence: 84%

Preparation and Characterization of Alginate Beads by Drop Weight

Kamaruddin¹,

Yusoff²,

Aziz³

2014

IJTech

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The preparation and characterization of macro alginate beads are always associated with appropriate techniques involving precise measurement of shape, size, volume and density of the products. Depending on the type of application, encapsulation of macro alginate beads can be accomplished by various techniques including chemical, ionotropic, physical and mechanical methods. This work describes a method for preparing macro alginate beads through drop weight. The macro beads (2.85-3.85 mm) were prepared via different concentrations of alginate (0.5, 1.0, 1.5 and 2.0 g/L), dripping tip size (0.04-0.14 cm) and immersion into a predetermined concentration of calcium chloride (CaCl 2 ) bath. A custom made dripping vessel fabricated from acrylic plastic, connected to an adjustable dripping clamp was used to simulate the dripping process of the molten alginate at different tip sizes. It was observed that at different dripping tips, the correction factor for the alginate slurry was found in the range of 0.73-0.83. Meanwhile, the lost factor, K LF was observed at 0.93-2.3 and the shrinkage factors were limited to 2.00% from the overall distributed data. It was concluded that liquid properties had no effect on the liquid lost factor. The bead size prediction for different concentrations of alginate solution was compared to the experimental data. Subsequently, it was concluded that increasing the tip size caused the bead size to deviate almost 20% when compared to the experimental and predicted values, respectively.

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Section: Drop Weight Analysissupporting

confidence: 84%

Preparation and Characterization of Alginate Beads by Drop Weight

Kamaruddin¹,

Yusoff²,

Aziz³

2014

IJTech

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“…The reduction in drop sizes also decreased with further increases in the nanoparticle content. Similar results have also been reported by Aveyard et al[114], Khakpay et al[115], Skelland and Slaymaker[116],…”

supporting

confidence: 89%

A critical review on the use of nanoparticles in liquid–liquid extraction

Amani

Ahmadi

et al. 2018

Chemical Engineering Science

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Recently, the use of nanoparticles in extraction columns has gained increasing attention due to their potential to enhance mass transfer processes. Most of the reported work, however, has been concerned with mass transfer enhancement in gas-liquid systems in the presence of nanoparticles, while limited studies of liquid-liquid systems have been reported. Liquidliquid extraction is an extensively employed separation method that has taken on a substantial role in engineering and industrial applications for recovery processes. Therefore, the aim of this review article is to provide an overview of the state-of-the-art from the available literature on the effect of nanoparticles on the hydrodynamic behavior and mass transfer performance of liquid-liquid systems. Attention is also given to providing an understanding of the mechanisms responsible for the improvements in mass transfer with the use of nanoparticles. In the majority of studies, the presence of nanoparticles was found to be beneficial and to lead to improved mass transfer, although a few investigations reported a detrimental impact of nanoparticles. The literature does not clearly describe the conditions under which the addition of nanoparticles would be unfavorable. Moreover, the addition of nanoparticles always introduces potential drawbacks, such as sedimentation, accumulation, or clogging inside extraction columns, as well as the need to separate the nanoparticles at the outlets. These drawbacks have not been considered in the literature, limiting the practical employment of nanoparticles in this industry.

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“…Previously, others have used the Harkins-Brown correction factor [26] to describe the amount remaining at a capillary opening after droplet detachment [27][28][29]. This factor uses an empirical relation including the capillary diameter and volume of the detached droplet.…”

Section: Pressure Pinch Constraintmentioning

confidence: 99%