Wall-to-liquid mass transfer in packed and fluidized beds with gas-liquid concurrent upflow.

Yasunishi, Akira; Fukuma, Miki; Muroyama, Katsuhiko

doi:10.1252/jcej.21.522

Cited by 29 publications

(21 citation statements)

References 4 publications

(4 reference statements)

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“…It is shown that the mass transfer correlation proposed by Yasunishi et al [26] is pretty close to the present correlation for the heat transfer, Eq. (12), which, in turn, shows an analogy between the surface-to-liquid heat and mass transfer in the gas-liquid, liquid-solid and gas-liquid-solid fluidized systems.…”

Section: Confirmation Of Presence Of Analogy Between the Heat And Massupporting

confidence: 89%

“…10 shows the plot of the quantity, Sh/Sc ±1/3 versus the specific power group, E 1/3 /D 4/3 /m l ±1 on the log-log coordinates for the mass transfer coefficient data for the immersed vertical cylinder or the wall in the three-phase fluidized bed [3]. The correlation for the mass transfer coefficient (solid line) is shown to be very similar to the correlation for the wall-to-bed mass transfer coefficient (broken line) by Yasunishi et al [26]. The heat transfer correlation (dotted line) in the present study (Eq.…”

Section: Confirmation Of Presence Of Analogy Between the Heat And Massupporting

confidence: 62%

“…We showed that the data for the mass transfer coefficient were well correlated in a unified dimensionless formula, in terms of the specific power group including the energy dissipation rate per unit mass of liquid. We also indicated that an intimate analogy was present between the wall-to-bed mass transfer and the wall-tobed heat transfer [26]. We also measured the immersed cylinder surface-to-liquid mass transfer coefficient using vertically and horizontally arranged cylinder electrodes [3].…”

Section: Introductionmentioning

confidence: 78%

“…On the other hand, Yasunishi et al [26], Fukuma et al [27] and Muroyama et al [28] applied the boundary layer theory coupled with Kolmogoroff's theory of local isotropic turbulence for evaluating the effective Reynolds number characterizing the liquid-phase turbulence, to derive a unified formula in terms of the Sherwood number, the Schmidt number and the specific power group. This formula is used for correlating the solid surface-to-liquid mass transfer coefficient in various systems, including the gas-liquid two-phase flow and the liquid-solid and three-phase fluidized beds.…”

Section: Correlation In Terms Of the Specific Power Groupmentioning

confidence: 99%

See 3 more Smart Citations

Heat Transfer from Immersed Vertical Cylinders in Gas-Liquid and Gas-Liquid-Solid Fluidized Beds

Muroyama

Okumichi

Goto

et al. 2001

Chem. Eng. Technol.

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Section: Confirmation Of Presence Of Analogy Between the Heat And Massupporting

confidence: 89%

Section: Confirmation Of Presence Of Analogy Between the Heat And Massupporting

confidence: 62%

Section: Introductionmentioning

confidence: 78%

Section: Correlation In Terms Of the Specific Power Groupmentioning

confidence: 99%

See 2 more Smart Citations

Heat Transfer from Immersed Vertical Cylinders in Gas-Liquid and Gas-Liquid-Solid Fluidized Beds

Muroyama

Okumichi

Goto

et al. 2001

Chem. Eng. Technol.

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“…Three-phase fluidization [1][2][3][4][5][6][7] is considered to be one of the vital methods of multiphase flow contacting operation because many fold improvement in heat and mass transfer coefficients is observed in it in comparison with two-phase and homogeneous flow systems in general. Further, it provides intimate mixing, isothermal conditions, uniform concentrations, high heat and mass transfer rates, high liquid holdup, ability to use small catalyst particles, accurate temperature control to achieve good selectivity and increased protection of catalyst, etc.…”

Section: Introductionmentioning

confidence: 99%

Liquid-wall mass transfer in three phase fluidized beds with cross-flow of electrolyte

Ramesh

Raju

Sarma

et al. 2008

Chemical Engineering Journal

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Vertical Cylinder‐to‐Slurry Heat Transfer in a Gas‐Slurry Transport Bed

et al. 2003

Self Cite

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She gas-slurry transport bed is a unique operation where the upward flow of a liquid-solid suspension is contacted with the concurrent up-flow of a reacting gas. Such an operation is exemplified by the main reactor and the preheater in a coal liquefaction process (Onozaki et al., 2000). The chemical absorption associated with reactant or product solids suspension for environmental protection use, the UASB unaerobic process using a suspended granular bed of self-coagulated microorganisms for treating wastewater from a food processing factory and the suspension electrolysis of metals are other industrial applications of the gas-slurry transport bed operation (e.g., Fan, 1989;Deckwer, 1992). The heat and mass transfer characteristics in the gas-slurry transport bed are important parameter in designing such a reactor.In the gas-liquid-solid fluidized beds where rather coarser particles are suspended in an expanded stationary bed, the wall-to-bed heat transfer coefficients were measured and correlated by several investigators (Muroyama et al., 2001b). So far several generalized correlation methods have been proposed for the heat and mass transfer coefficients in the gas-liquid-solid fluidized bed. Kato et al. (1981) measured the wall heat transfer coefficient using a short wall heater and correlated the data using a dimensionless empirical correlation. A similar approach was also employed by Kato et al. (1984a,b) and Kang et al. (1985) for correlating the immersed cylinder-to-bed heat transfer data in the three-phase fluidized bed. Muroyama et al. (1986a, b) employed the so called Colburn j-factor approach, that measured the apparent wall heat transfer coefficient excluding the effect of the interior radial heat transfer resistance and correlated the heat transfer coefficient in terms of the modified j-factor and the modified Reynolds number, correcting for the effect of bed expansion on the effective liquid velocity and the spatial arrangement of the particles. Meanwhile, Yasunishi et al. (1988) measured and correlated the wall-to-liquid mass transfer coefficient in the three-phase fluidized beds using the limiting current method. They correlated the mass transfer coefficient in a unified dimensionless formula in terms of the Sherwood number, the Schmidt number and the specific power group including the energy dissipation rate per unit mass of liquid. They indicated the presence of an analogy between the wall-to-liquid mass transfer and heat transfer in the three-phase fluidized bed. Muroyama et al. (2001a) measured the cylinder surface-to-liquid mass transfer coefficients for the vertically and horizontally arranged electrodes using the limiting current method and correlated the data in the same way as employed by Yasunishi et al. (1988). Muroyama et al. (2001b) In the present study we measured the immersed vertical cylinder surface-to-slurry heat transfer coefficient in the liquid-solid and gas-slurry (three-phase) transport beds at controlled solid concentrations. The slurry contained 0.1 mm inert glass beads...

show abstract

Wall-to-liquid mass transfer in packed and fluidized beds with gas-liquid concurrent upflow.

Cited by 29 publications

References 4 publications

Heat Transfer from Immersed Vertical Cylinders in Gas-Liquid and Gas-Liquid-Solid Fluidized Beds

Heat Transfer from Immersed Vertical Cylinders in Gas-Liquid and Gas-Liquid-Solid Fluidized Beds

Liquid-wall mass transfer in three phase fluidized beds with cross-flow of electrolyte

Vertical Cylinder‐to‐Slurry Heat Transfer in a Gas‐Slurry Transport Bed

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