Effect of Packed Bed on Mass Transfer in External-Loop Airlift Bubble Column

JOURNAL OF CHEMICAL ENGINEERING OF JAPAN

Kenji Okada¹  Yasuharu Akagi²  Yoshiko Nagata² 

[1] Department of Chemical Technology, Kurashiki University of Science and the Arts;Department of Applied Chemistry, Okayama University of Science

关键词: Mass Transfer;    Packed Bed;    Bubble Size;    Airlift Bubble Column;    Correlation Equation;   

DOI  :  10.1252/jcej.29.582

来源: Maruzen Company Ltd

【 摘 要 】

References(13)Cited-By(7)The influence of packed bed set in the riser section on the liquid-side volumetric mass transfer coefficient (KLaR) in an external-loop airlift bubble column was examined with water, 20 wt% glycerol, 10 wt% ethanol and 0.3 wt% CMC aqueous solutions. The KLaR was determined by the measurement of time-dependent oxygen concentration dissolved in the liquids. Bubble size, bubble rise velocity and gas holdup in the riser were measured to examine the effect of the packed bed using an optical fiber two-phase flow system. The presence of the packed bed in the riser increased the KLaR values for the liquids used. This was associated with the increase in the specific gas-liquid interfacial area due to bubble breakage by the packed bed. In addition, a correlation equation for KLaR was proposed for both types of airlift bubble columns with and without the packed bed.

【 授权许可】

Unknown