LONGITUDINAL DISPERSION COEFFICIENT OF LIQUID IN THREE-PHASE FLUIDIZED BED FOR GAS-LIQUID-SOLID SYSTEMS

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

SHIGEHARU MOROOKA¹  MAKOTO KOYAMA¹  YASUO KATO¹  TOKIHIRO KAGO¹  SHOU-ZHI YANG¹ 

[1] Department of Applied Chemistry, Kyushu University

关键词: Chemical Reactor;    Fluidization;    Fluidized Bed;    Three Phase Fluidization;    Dispersion;    Dispersion Coefficient;    Mixing;    Multiphase Flow;    Peclet Number;    Bubble Column;   

DOI  :  10.1252/jcej.18.313

来源: Maruzen Company Ltd

【 摘 要 】

References(13)Cited-By(6)The longitudinal dispersion coefficient of liquid, E, , was measured in three-phase fluidized beds 12 and 19 cm in diameter. The data of Ef, were correlated by expanding the equation for liquid dispersion in the bubble column, and the following equations were obtained. Ug -1: UgDT/El = (1 + vl/Ul)0.40Bo0.225Pe(BC) Ug > 25 cm•s-1: UgDT/El = Pe(BC) In the range of Ug = 9-25 cm•s-1, El was approximated by connecting the above equations. The notations are: Pe(BC)=(ηl/ηw)0.07[13(Ug/√gDT)/{1+6.5(Ug/√gDT)0.8}]Bo=gd2ppl/σ, DT = diameter of bed, dp = diameter of solid particles, g = acceleration due to gravity, Ug = superficial gas velocity, Ul = superficial liquid velocity, vt = terminal velocity of solid particle, ηl = viscosity of liquid, ηw = viscosity of water, Pl = liquid density and σ = surface tension.

【 授权许可】

Unknown