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이명섭,김덕찬 서울市立大學校 1986 論文集 Vol.20 No.1
The characteristics of gas-liquid mass transfer in bubble column and three phase fluidized beds have been Studied in a 6.3cm I.D and 160cm height acryl column. The three phase fluidized beds were consisted of water, carbon dioxide mixed with oil-free compressed air and glass beads as liquid, gas and solid phases respectively. In this investigation, the effects of gas velocity (4.28-21.39cm/sec), liquid velocity (1.07-17.79 cm/sec) and particle size(1.3-6.0mm) on the ovlumetric mass transfer coefficient have been examined. The effects of the hight from the distributor on concentration profile and volumetric mass transfer coefficient were also determined. Volumetric mass transfer coefficient, was increased with increasing gas and liquid velocity, and particle sizes, but decreased with the height from the distributor. The concentration profile was showed exponential increasing with the height, but in the three phase fluidized beds, it was increased rapidly and decreased at once, i.e., it was exhibited the maximum value in the grid zone, and then increased continuously with the height. Volumetric mass transfer coefficient, K??, were correlated in terms of gas and liquid velocity and particle size; ????