caa a22 4500 469126531 CHVBK 20180323133152.0 cr unu---uuuuu 170328e19920401xx s 000 0 eng 10.1007/BF02697530 doi (NATIONALLICENCE)springer-10.1007/BF02697530 Behavior of gas bubbles in a concentric cylindrical airlift column [Elektronische Daten] [Keun Choi, Won Lee] Using a light transmission optical probe, the effect of superficial gas velocity on bubble properties(bubble size, bubble rising velocity, bubble frequency and local gas holdup) at axial and radial positions was determined in the riser and the downcomer of a concentric cylindrical airlift reactor. The vertical bubble length, the bubble rising velocity and the bubble frequency at axis in the riser increased with increasing superficial gas velocity and the bed height. The radial distribution of the local gas holdup, vertical bubble length and bubble frequency in the riser and the downcomer were found to be non-uniform. The profiles of the local gas holdup, vertical bubble length and bubble rising velocity in the riser were shown as parabolic shapes. The local gas holdup, the vertical bubble length and the bubble frequency in the downcomer changed with superficial gas velocity and the distance from the top of the draft tube. Korean Institute of Chemical Engineering, 1992 Choi Keun Department of Chemical Engineering, Korea Advanced Institute of Science and Technology, 373-1, Kusong-dong, Yusung-gu, 305-701, Taejon, Korea aut Lee Won Department of Chemical Engineering, Korea Advanced Institute of Science and Technology, 373-1, Kusong-dong, Yusung-gu, 305-701, Taejon, Korea aut Korean Journal of Chemical Engineering Springer-Verlag 9/2(1992-04-01), 66-73 0256-1115 9:2<66 1992 9 11814 https://doi.org/10.1007/BF02697530 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02697530 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Choi Keun Department of Chemical Engineering, Korea Advanced Institute of Science and Technology, 373-1, Kusong-dong, Yusung-gu, 305-701, Taejon, Korea aut NATIONALLICENCE 700 1- Lee Won Department of Chemical Engineering, Korea Advanced Institute of Science and Technology, 373-1, Kusong-dong, Yusung-gu, 305-701, Taejon, Korea aut NATIONALLICENCE 773 0- Korean Journal of Chemical Engineering Springer-Verlag 9/2(1992-04-01), 66-73 0256-1115 9:2<66 1992 9 11814 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer