Modeling of particle—liquid heat and mass transfer in multiphase systems with the film—penetration model

Briens, Cédric; Pozo, M. Del; Chiu, Kevin K. S.; Wild, Gabriel

doi:10.1016/0009-2509(93)80334-m

Cited by 11 publications

(4 citation statements)

References 5 publications

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“…Brusset et al [29] have developed correlations for S and L from previously published experimental data on the evaporation of liquids into a turbulent gas stream in a wetted-wall column. Briens et al [30] have experimentally measured particle-liquid heat-and mass-transfer coefficients in packed and fluidised beds of glass beads and used them to obtain values of S and L as functions of liquid superficial velocity, gas velocity and radial position in the bed.…”

Section: Film-penetration Modelmentioning

confidence: 99%

A Theoretical Analysis of Dissolved-Gas Transfer to the Bulk Liquid in Gas Absorption with a First-Order Reaction

Chatterjee

2010

Indian Chemical Engineer

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A theoretical analysis using the surface-renewal and film-penetration models, which includes gas-phase resistance to mass transfer, is presented for the rate of absorption of a gas and its transfer to the bulk liquid in the case where the solute gas undergoes a first-order chemical reaction in the liquid phase. It reveals that:(a) The fraction of absorbed gas transported to the bulk liquid depends upon the Hatta number Ha in case of the surface-renewal model and on Ha as well as a dimensionless hydrodynamic parameter in case of the film-penetration model. (b) The widely assumed law of addition of resistances is valid for the surface-renewal and film-penetration models. (c) The reaction influences both the overall mass-transfer coefficient and the nature of the driving force, i.e. the increased rate of absorption due to the reaction is not solely due to the enhancement factor multiplying the liquid-phase mass-transfer coefficient for physical absorption as has been conventionally assumed in the literature.It is also shown that in a gas-liquid reactor the film and surface-renewal models give close predictions for both the rate of absorption and concentration of dissolved gas in the liquid leaving the reactor. For values of Ha ≥ 0.5, the bulk-liquid concentration of dissolved gas predicted by both models is negligible compared to its interfacial concentration.

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Section: Film-penetration Modelmentioning

confidence: 99%

A Theoretical Analysis of Dissolved-Gas Transfer to the Bulk Liquid in Gas Absorption with a First-Order Reaction

Chatterjee

2010

Indian Chemical Engineer

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“…These increases, as the increases in heattransfer coefficient (Figure 6), may be caused by the bed contraction which resulted from the column inclination. Briens et al (1992) showed how the film-penetration model is required for accurate predictions of particle-liquid mass transfer under typical industrial conditions. They also showed how the two parameters of this model, the film thickness and the surface renewal frequency, could be obtained by measuring the mass-and heat-transfer coefficients under the same conditions.…”

Section: Particle-liquid Mass Transfermentioning

confidence: 99%

Effect of column inclination on the performance of three‐phase fluidized beds

1992

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“…Chatterjee & Altwicker [ 26 ] re-examined the data of Brusset et al [ 25 ] and showed that SL 2 / D varied linearly with the gas-phase Reynolds number. Briens et al [ 27 ] experimentally measured particle–liquid heat- and mass-transfer coefficients in packed and fluidized beds of glass beads and obtained values of S and L as functions of liquid superficial velocity, gas velocity and radial location in the bed. For packed and fluidized beds of particles, they found that the Chilton–Colburn analogy (which relates the heat- and mass-transfer coefficients) was not adequate and recommended the film-penetration model for accurate predictions.…”

Section: Introductionmentioning

confidence: 99%

A surface renewal model for unsteady-state mass transfer using the generalized Danckwerts age distribution function

Horvath

Chatterjee

2018

R. Soc. open sci.

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The recently derived steady-state generalized Danckwerts age distribution is extended to unsteady-state conditions. For three different wind speeds used by researchers on air–water heat exchange on the Heidelberg Aeolotron, calculations reveal that the distribution has a sharp peak during the initial moments, but flattens out and acquires a bell-shaped character with process time, with the time taken to attain a steady-state profile being a strong and inverse function of wind speed. With increasing wind speed, the age distribution narrows significantly, its skewness decreases and its peak becomes larger. The mean eddy renewal time increases linearly with process time initially but approaches a final steady-state value asymptotically, which decreases dramatically with increased wind speed. Using the distribution to analyse the transient absorption of a gas into a large body of liquid, assuming negligible gas-side mass-transfer resistance, estimates are made of the gas-absorption and dissolved-gas transfer coefficients for oxygen absorption in water at 25°C for the three different wind speeds. Under unsteady-state conditions, these two coefficients show an inverse behaviour, indicating a heightened accumulation of dissolved gas in the surface elements, especially during the initial moments of absorption. However, the two mass-transfer coefficients start merging together as the steady state is approached. Theoretical predictions of the steady-state mass-transfer coefficient or transfer velocity are in fair agreement (average absolute error of prediction = 18.1%) with some experimental measurements of the same for the nitrous oxide–water system at 20°C that were made in the Heidelberg Aeolotron.

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Modeling of particle—liquid heat and mass transfer in multiphase systems with the film—penetration model

Cited by 11 publications

References 5 publications

A Theoretical Analysis of Dissolved-Gas Transfer to the Bulk Liquid in Gas Absorption with a First-Order Reaction

A Theoretical Analysis of Dissolved-Gas Transfer to the Bulk Liquid in Gas Absorption with a First-Order Reaction

Effect of column inclination on the performance of three‐phase fluidized beds

A surface renewal model for unsteady-state mass transfer using the generalized Danckwerts age distribution function

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