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구형입자를 현탁시킨 이중관 기포탑에서의 기-액간 물질전달
Mass Transfer between Gas and Liquid in a Spherical Particle-Suspended Bubble Column with Draught Tube
HWAHAK KONGHAK, April 1997, 35(2), 225-230(6), NONE
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Abstract
현탁기포탑은 불용성 생성물이나 고체 입자를 담체로 하는 생체 고정화 반응장치로서 많이 이용된다. 이를 위해 구형 수지 입자를 현탁시킨 이중관 기포탑내에서 기체체류량과 액상용량 물질전달계수를 기체유속, 입자의 농도와 크기 및 흡출관의 직경에 따라 각각 0.02-0.1225m/sec, 0-20% 및 0.05-0.09m 범위에서 실험하여 다음과 같은 결과를 얻었다. 기체체류량과 액상용량 물질전달계수는 입자의 농도와 크기가 증가함에 따라 감소하였으며 실험자료의 다중회기분석을 통하여 이들 사이의 상관관계를 수식화하였다.
KLa(Do2/DL)=4.9424×103Re0.5327(1-φS)0.5719(dp/dpR)-0.0258(Di/Do)0.0589εG0.3344
KLa(Do2/DL)=4.9424×103Re0.5327(1-φS)0.5719(dp/dpR)-0.0258(Di/Do)0.0589εG0.3344
The effects of gas velocity, the concentration and size of particle, and diameter of draught tube on the gas holdup and the volumetric liquid phase mass transfer coefficient in a urea resin-particle-suspended bubble column were studied experimentally. εG and KLa were decreased with increasing the concentration and size of particle and based on these observations, correlation equation for gas holdup and volumetric liquid phase mass transfer coefficient was obtained through a regression analysis of experimental data.
KLa(Do2/DL)=4.9424×103Re0.5327(1-φS)0.5719(dp/dpR)-0.0258(Di/Do)0.0589εG0.3344
KLa(Do2/DL)=4.9424×103Re0.5327(1-φS)0.5719(dp/dpR)-0.0258(Di/Do)0.0589εG0.3344
Keywords
References
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Koide K, Sato H, Iwamoto S, J. Chem. Eng. Jpn., 16, 407 (1983)
Koide K, Yamazoe S, Harada S, J. Chem. Eng. Jpn., 18, 287 (1985)
Koide K, Shibata K, Ito H, Kim SY, Ohtaguchi K, J. Chem. Eng. Jpn., 25, 11 (1992)
Fukuda H, Shiotani T, Okada W, Morikawa H, J. Ferment. Technol., 6, 619 (1978)
Chisti MY, Moo-Young M, Biotechnol. Bioeng., 31, 487 (1988)
Heck J, Onken U, Chem. Eng. Sci., 42, 1211 (1987)
Onken U, "Bubble Columns," German/Japanese Symposium, 49 (1988)
Salvacion JL, Murayama M, Ohtaguchi K, Koide K, J. Chem. Eng. Jpn., 28(4), 434 (1995)
Muroyama K, Yasunishi A, Mitani Y, "Hydrodynamics and Gas-Liquid Mass Transfer in an Airlift Slurry Reactor," Proceedings 3rd Pacific Chem. Eng. Congress, 303 (1983)
Akita K, Yoshida F, Ind. Eng. Chem. Process Des. Dev., 12, 77 (1973)
