Gas holdup and volumetric liquid-phase mass transfer coefficient in bubble column with draught tube and with gas dispersion into annulus.

Koide, Kozo; Kurematsu, Katsumi; Iwamoto, Satoshi; Iwata, Yutaka; Horibe, Kazuyoshi

doi:10.1252/jcej.16.407

Cited by 85 publications

(25 citation statements)

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“…(15) and (16) developed here agreed exceptionally well with Eq. (17) of Koide et al [31] and this validates our data. Of course the earlier developed Eq.…”

Section: Gas-liquid Mass Transfersupporting

confidence: 93%

“…(15) and (16) [31]. The reasons for this disparity are apparently linked with important differences between the reactor used by us and that used by Bang et al [21].…”

Section: Gas-liquid Mass Transfermentioning

confidence: 81%

“…A correlation for the overall volumetric gas-liquid mass transfer coefficient in the annulus sparged concentric-tube airlift vessels has been reported [31], as follows:…”

Section: Gas-liquid Mass Transfermentioning

confidence: 99%

“…Eq. (17) was developed for the following range of variables: (17) was 12% for 175 measurements [31]. As shown in Fig.…”

Section: Gas-liquid Mass Transfermentioning

confidence: 99%

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Oxygen transfer and mixing in mechanically agitated airlift bioreactors

Chisti

Jäuregui‐Haza²

2002

Biochemical Engineering Journal

152

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Gas holdup, mixing, liquid circulation and gas-liquid oxygen transfer were characterized in a large (∼1.5 m 3 ) draft-tube airlift bioreactor agitated with Prochem ® hydrofoil impellers placed in the draft-tube. Measurements were made in water and in cellulose fiber slurries that resembled broths of mycelial microfungi. Use of mechanical agitation generally enhanced mixing performance and the oxygen transfer capability relative to when mechanical agitation was not used; however, the oxygen transfer efficiency was reduced by mechanical agitation. The overall volumetric gas-liquid mass transfer coefficient declined with the increasing concentration of the cellulose fiber solids; however, the mixing time in these strongly shear thinning slurries was independent of the solids contents (0-4% w/v). Surface aeration never contributed more than 12% to the total mass transfer in air-water.

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“…(15) and (16) developed here agreed exceptionally well with Eq. (17) of Koide et al [31] and this validates our data. Of course the earlier developed Eq.…”

Section: Gas-liquid Mass Transfersupporting

confidence: 93%

“…(15) and (16) [31]. The reasons for this disparity are apparently linked with important differences between the reactor used by us and that used by Bang et al [21].…”

Section: Gas-liquid Mass Transfermentioning

confidence: 81%

“…A correlation for the overall volumetric gas-liquid mass transfer coefficient in the annulus sparged concentric-tube airlift vessels has been reported [31], as follows:…”

Section: Gas-liquid Mass Transfermentioning

confidence: 99%

“…Eq. (17) was developed for the following range of variables: (17) was 12% for 175 measurements [31]. As shown in Fig.…”

Section: Gas-liquid Mass Transfermentioning

confidence: 99%

See 2 more Smart Citations

Oxygen transfer and mixing in mechanically agitated airlift bioreactors

Chisti

Jäuregui‐Haza²

2002

Biochemical Engineering Journal

152

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“…The details of this method are similar to those in the previous paper. 5) Photographs of bubbles in the column were taken in three regions (the region j, 7= 1-3) whose levels from the gas distributor were respectively 0-0.33 m, Figure 3 shows the effect of c 'B, the concentration of surface-active substance, on e/e0, the ratio of s in aqueous solution to that in water. s/s0 seems to increase at lower concentration in an aqueous solution of alcohol with longer carbon chain length.…”

Section: Methodsmentioning

confidence: 99%

Effects of surface-active substances on gas holdup and gas-liquid mass transfer in bubble column.

Koide

Yamazoe

Harada

1985

J. Chem. Eng. Japan / JCEJ

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The effects of surfactants and antifoam agent on the gas holdup s, the liquid-phase mass transfer coefficient kL and the volumetric liquid-phase mass transfer coefficient kLa in a bubble column were studied experimentally. An addition of surfactants such as //-alcohols to water increases s and decreases kL, and an addition of antifoam agent to water decreases e, kL and kLa. However, the degree of reduction of kL value by an addition of surfactant to water is lower for bubble swarms in a bubble column than that for a single bubble in stagnant liquid. Based on these observations, the previous model for estimating kL of a single bubble in aqueous solutions of surface-active substance is modified so as to be applicable to the estimation of kL for bubble swarms in a bubble column.

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Mass Transfer

Chisti¹

2002

Kirk-Othmer Encyclopedia of Chemical Technology

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Mass transport phenomena influence all kinds of processes, often controlling the rate, the yield, the product spectrum, and product recovery. This article details the mass transfer considerations in production and processing of chemicals. Fundamentals of mass transfer are discussed for gas–liquid, liquid–liquid, and solid–liquid systems. Methods for measurement of the overall gas–liquid volumetric mass transfer coefficient ( k L a L ) are noted. Mass transport behavior is discussed for various kinds of reactors: laboratory shake flasks, vortex aerated devices, stirred tanks, bubble columns, airlift reactors, fluidized beds, packed beds, and other systems. Prediction and estimation of the various mass transfer coefficients are emphasized. Mass transfer within particles is treated as being relevant to adsorption, ion exchange, chromatographic separations, and heterogeneous catalysis. Mass transport in membrane processing is outlined.

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Gas holdup and volumetric liquid-phase mass transfer coefficient in bubble column with draught tube and with gas dispersion into annulus.

Cited by 85 publications

References 1 publication

Oxygen transfer and mixing in mechanically agitated airlift bioreactors

Oxygen transfer and mixing in mechanically agitated airlift bioreactors

Effects of surface-active substances on gas holdup and gas-liquid mass transfer in bubble column.

Mass Transfer

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