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액-액 삼상유동층에서 액-액 접촉면적과 물질전달 특성
Liquid-Liquid Interfacial Area and Mass Transfer Characteristics in Liquid-Liquid Three-Phase Fluidized Beds
HWAHAK KONGHAK, June 1993, 31(3), 311-317(7), NONE
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Abstract
액-액 삼상유동층에서 분산상（0.01-0.03 m/s） 및 연속상유속(0.02-0.08 m/s)과 입자크기 (1.0-3.0 mm)가 액-액 접촉면적과 물질전달계수에 미치는 영향을 내경 0.076 m, 높이 1.92 m인 Q.V.F. Pyrex glass column에서 결정 하였다. 액-액 접촉면적은 분산상유속에 따라 증가하나 연속상유속의 증가에 따라서는 감소하였다. 연속상 물질전달계수는 분산상과 연속상유속에 따라 증가하였다. 액-액 삼상유동층에서 연속상 물질전달계수를 입자의 Sherwood수의 함수로 표시하여 Schmidt수와 energy dissipation rate를 포함한 Reynolds수로 상관식을 제시 하였다.
The effects of the dispersed（0.01-0.03 m/s） and continuous phase velocities(0.02-0.08 m/s) and particle size(1-3 mm) on liquid-liquid interfacial area(a) and mass transfer coefficient(kc) have been determined in a 0.076 m-I.D.×1.92 m-high Q.V.F. Pyrex glass column. Liquid-liquid interfacial area increases with increasing dispersed velocity, but it decreases with the continuou phase velocity in liquid-liquid three-phase fluidized beds. Mass transfer coefficient increases with increasing the continuous and dispersed phase velocities. The mass transfer coefficient of continuous phase in terms of Sherwood number in liquid-liquid three-phase fluidized beds has been correlated with Schmidt and particle Reynolds numbers based on the energy dissipation rate in the bed.
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Hellwig LR, vanDriesen RP, Sohuman SC, Slugsatd CE, Oil Gas J., 60, 119 (1972)
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Roszak J, Gawronski R, Chem. Eng. J., 17, 101 (1979)
Dakshinamurty P, Subrahmanyan V, SeshagiriRao VVB, Prasad MSSS, Ind. Eng. Chem. Process Des. Dev., 23, 132 (1984)
Kim SD, Lee MJ, Han JH, Can. J. Chem. Eng., 67, 57 (1988)
Clift R, Grace JR, Weber ME, "Bubbles, Drops, and Particles," Academic Press, New York (1978)
Marashino MJ, Treybal RE, AIChE J., 17, 1174 (1971)
Yeheskel J, Kehat E, AIChE J., 19, 720 (1973)
Lim F, Ford JO, Can. J. Chem. Eng., 66, 150 (1988)
Han JH, Kim SD, Chem. Eng. Sci., in press, 47 (1993)
Kim DY, "Droplet Characteristics in Three(Liquid-Liquid-Solid) Fluidized Beds," M.S. Thesis, KAIST (1990)
Kim SD, Baker CGJ, Bergougnou MA, Can. J. Chem. Eng., 53, 134 (1975)
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Kim JO, Kim SD, Particulate Sci. Tech., 5, 309 (1987)
Lee DH, Kim JO, Han JH, Kim SD, HWAHAK KONGHAK, 31(1), 118 (1993)
Page R, "Three Phase Fluidization,", Ph.D. Dissertation, Cambridge University (1966)
Chang SK, Kang Y, Kim SD, J. Chem. Eng. Jpn., 19, 524 (1986)
Nguyen-Tien K, Patwari AN, Schumpe A, Deckwer WD, AIChE J., 31, 194 (1985)
Kang Y, Kim SD, Ind. Eng. Chem. Process Des. Dev., 25, 717 (1986)
Lee DH, Kim JO, Kim SD, Chem. Eng. Commun., in press (1993)
Kawase Y, Halard B, Moo-Young M, Chem. Eng. Sci., 42(7), 1609 (1987)
