LIQUID DISPERSION IN GAS-LIQUID FLUIDIZED-BEDS .2. AXIAL AND RADIAL DISPERSION - DISPERSED PLUG-FLOW MODEL

被引：19

作者：

ELTEMTAMY, SA

ELSHARNOUBI, YO

EL-HALWAGI, MM

机构：

[1] Pilot Plant (Laboratory, N.R.C. Dokki, Cairo

来源：

CHEMICAL ENGINEERING JOURNAL AND THE BIOCHEMICAL ENGINEERING JOURNAL | 1979年 / 18卷 / 02期

关键词：

D O I：

10.1016/0300-9467(79)80026-X

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Dispersion in the liquid phase of cocurrent, liquid-supported, gas-liquid fluidized beds, expressed in terms of axial and radial dispersion coefficients, has been evaluated from radial concentration profiles downstream of a point-source, steady state tracer injector. Radial dispersion coefficients were estimated from the profiles by employing the infinite space model of Klinkenberg, Krajenbrink and Lauwerier. A method has been developed to estimate both radial and axial coefficients from Klinkenberg et al.'s solution to the dispersed plug-flow model. The results are in satisfactory agreement with those obtained from simpler models. The radial dispersion coefficients were one order of magnitude lower than the axial dispersion coefficients. © 1979.

引用

页码：161 / 168

页数：8

共 18 条

[1]

Schugerl, Proc. Int. Symp. on Fluidization, (1967)

[2]

Afschar, Schugerl, Chem. Eng. Sci., 23, (1968)

[3]

Ostergaard, Michelsen, Symp. Fund. Appl. Fluidization, Tampa, Florida, (1968)

[4]

Michelsen, Ostergaard, Chem. Eng. J., 1, (1970)

[5]

Vail, Manakov, Manshilin, Int. Chem. Eng., 8, (1968)

[6]

Kim, Baker, Bergougnou, Hold-up and axial mixing characteristics of two and three phase fluidized beds, The Canadian Journal of Chemical Engineering, 50, (1972)

[7]

El-Temtamy, El-Sharnoubi, El-Halwagi, Chem. Eng. J., 18, (1979)

[8]

Ostergaard, AIChE 69th Annual Meeting Chicago, (1976)

[9]

Bischoff, Levenspiel, Chem. Eng. Sci., 17, (1962)

[10]

Levenspiel, Bischoff, Adv. Chem. Eng., 4, (1963)

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