Effect of Particle Penetration Depth on Solid/liquid Mass Transfer Rate by Particle Blowing Technique

Okuno, Takahiro; Uddin, Md. Azhar; Kato, Yoshiei; Lee, Sang Beom; Kim, Yong Hwan

doi:10.2355/isijinternational.isijint-2017-336

Cited by 11 publications

(7 citation statements)

References 25 publications

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“…The calculated mass-transfer coefficients are higher, in the range of 7–18 × 10 –3 cm/s, increasing with the penetration depth. These values are higher than those reported by Shiba et al; however, the blowing apparatus used by Okuno et al certainly increased the mass-transfer rates. In general, it is known that floating particles tend to aggregate, covering the liquid surface with layers which inhibit other particles to come into contact with the liquid, a phenomenon that may result in low mass-transfer coefficients.…”

Section: Discussioncontrasting

confidence: 57%

“…These values are in agreement with the conclusions of Harriott 18 on the minimum mass-transfer coefficient and the effects of density difference and incomplete suspension. Okuno et al 34 used perlite with a density of 0.1 g/ cm 3 , and the particles were blown into water to study the effect of penetration depth on the liquid−solid mass-transfer rate. The calculated mass-transfer coefficients are higher, in the range of 7−18 × 10 −3 cm/s, increasing with the penetration depth.…”

Section: Methods For the Estimation Ofmentioning

confidence: 99%

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Liquid–Solid Mass Transfer in Adsorption Systems—An Overlooked Resistance?

Inglezakis

Balsamo

Montagnaro

2020

Ind. Eng. Chem. Res.

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In liquid–solid adsorption, fluid film diffusion is typically faster than intraparticle diffusion, especially for microporous adsorbents. However, fluid film diffusion might play a significant role in the overall rate of the process for mesoporous–macroporous and non-porous solids. In most adsorption modeling studies, the fluid film diffusion step is typically ignored, which is not always justified. This article critically discusses the theory behind the liquid–solid mass-transfer coefficient in stirred vessels and presents the dissolution and adsorption methods adopted for estimating its value. Then, starting from the definition of the Biot number, an original analysis is developed with reference to selected studies. Surface versus pore diffusion of the adsorbate in the adsorbent is taken into account, and external versus internal mass-transfer resistance is considered to put the fluid film resistance back in the picture when needed. Iso-Biot charts where the operating points can be visualized are presented as well.

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Section: Discussioncontrasting

confidence: 57%

Section: Methods For the Estimation Ofmentioning

confidence: 99%

Liquid–Solid Mass Transfer in Adsorption Systems—An Overlooked Resistance?

Inglezakis

Balsamo

Montagnaro

2020

Ind. Eng. Chem. Res.

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“…Also, estimation of mass transfer velocity in power blasting condition was reported. 3) Furthermore, for powder injection process into liquid, Narita et al 4) reported penetration and diversion behavior, and Oda et al 5) evaluated effect of wettability (contact angle) and diameter of particle on the penetration ratio.…”

Section: Effect Of Particle Velocity On Penetration and Flotation Behmentioning

confidence: 99%

Effect of Particle Velocity on Penetration and Flotation Behavior

et al. 2018

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“…In this regard, there are many studies by Engh et al 7) , Nakanishi et al 8) , Narita et al 9) , Ozawa et al 10) , Ogawa and Matsumoto 11) , Oda 12) 、and Lee and Kim. 13) The research on the behavior of the spheres after the penetration was pioneered by Kimura et al 14) , and thereafter Lee and Tokuda 15) , Chang and Sohn 16) , and Okuno et al 17) have proposed the empirical equations focusing on the maximum penetration depth of the sphere. Moreover, Duez et al 18) plunged the sphere into the bath surface at the entry velocity below 8 m/s and reported that the critical entry velocity for splash formation decreased with the increasing static contact angle .…”

Section: Introductionmentioning

confidence: 99%

Numerical Analysis for Interaction of Fluid and Sphere Penetrating into Liquid Bath

2023

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In the steelmaking process, it is necessary to decrease impurities in steel to meet the increasing demand for high-grade products. Top blowing and blasting of powder reagent are desirable for the purpose and the deeper penetration of particles into the bath is important for efficient refining. In the present work, CFD calculation with VOF (Volume of Fluid) method and dynamic mesh was executed to study the reported penetration and residual bubble behavior of polypropylene sphere (diameter of 9.6 mm) with a static contact angle of 87 ° and 143 ° and an entry solid sphere velocity of 0.63, 0.89, and 1.53 m/s in the water model experiments. Calculated results showed the numerical analysis could evaluate the formation and breakup of air column behind the sphere and the generation of consequent residual bubble on the sphere. Good wettability and high entry speed promoted the deeper penetration of the sphere. Calculated dynamic contact angle on the basis of Kistler's model indicated that the difference between static and dynamic contact angles was within 13.7 ° in the present conditions and the discrepancy could not wield a substantial influence on the result of CFD calculation. The adoption of base and refined mesh without parallel zone around the sphere could not give a good agreement with the experimental results. On the other hand, the use of layer mesh was appropriate for reproducing the penetration depth and residual bubble volume observed in the experiments.

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Effect of Particle Penetration Depth on Solid/liquid Mass Transfer Rate by Particle Blowing Technique

Cited by 11 publications

References 25 publications

Liquid–Solid Mass Transfer in Adsorption Systems—An Overlooked Resistance?

Liquid–Solid Mass Transfer in Adsorption Systems—An Overlooked Resistance?

Effect of Particle Velocity on Penetration and Flotation Behavior

Numerical Analysis for Interaction of Fluid and Sphere Penetrating into Liquid Bath

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