GAS HOLDUPS AND FRICTION FACTORS OF GAS-LIQUID TWO-PHASE FLOW IN AN AIR-LIFT BUBBLE COLUMN

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

KIYOMI AKITA¹  TATSUYA OKAZAKI¹  HIROSHI KOYAMA¹ 

[1] Department of Chemical Engineering, The University of Tokushima

关键词: Chemical Reactor;    Bubble Column;    Air-lift;    Gas-Liquid Flow;    Gas Holdup;    Friction Factor;   

DOI  :  10.1252/jcej.21.476

来源: Maruzen Company Ltd

【 摘 要 】

References(14)Cited-By(20)Gas holdups and friction factors were measured for gas-liquid parallel two-phase flow in an air-lift bubble column. Velocities of gas and liquid, liquid viscosity, and surface tension were varied. The results were correlated with dimensionless equations. As to the gas holdups (εG), Akita-Yoshida''s equation1) for batchwise processes was modified to the following form to suit continuous parallel gas-liquid flow operation: εG(1-εG)-4=0.20(gD2ρL/γ)1/8(gD3/v2L)1/12(UGL/(gD)1/2) As to the friction factors (f), the following correlation was proposed. f=0.0468(UL/(gD)1/2)-1.1ε0.5G These equations are useful for estimations of gas holdups, distribution of gas holdup along the column height, and liquid circulation velocities between a riser and a downcomer in an air-lift bubble column.

【 授权许可】

Unknown