액-액 삼상유동층에서 분산상(0.01-0.03 m/s) 및 연속상유속(0.02-0.08 m/s)과 입자크기 (1.0-3.0 mm)가 액-액 접촉면적과 물질전달계수에 미치는 영향을 내경 0.076 m, 높이 1.92 m인 Q.V.F. Pyrex glass column에서 결정 하였다. 액-액 접촉면적은 분산상유속에 따라 증가하나 연속상유속의 증가에 따라서는 감소하였다. 연속상 물질전달계수는 분산상과 연속상유속에 따라 증가하였다. 액-액 삼상유동층에서 연속상 물질전달계수를 입자의 Sherwood수의 함수로 표시하여 Schmidt수와 energy dissipation rate를 포함한 Reynolds수로 상관식을 제시 하였다.
The effects of the dispersed(0.01-0.03 m/s) and continuous phase velocities(0.02-0.08 m/s) and particle size(1-3 mm) on liquid-liquid interfacial area(a) and mass transfer coefficient(kc) have been determined in a 0.076 m-I.D.×1.92 m-high Q.V.F. Pyrex glass column. Liquid-liquid interfacial area increases with increasing dispersed velocity, but it decreases with the continuou phase velocity in liquid-liquid three-phase fluidized beds. Mass transfer coefficient increases with increasing the continuous and dispersed phase velocities. The mass transfer coefficient of continuous phase in terms of Sherwood number in liquid-liquid three-phase fluidized beds has been correlated with Schmidt and particle Reynolds numbers based on the energy dissipation rate in the bed.
[References]
Yu YH, "Bubble Characteristics and Local Liquid Velocity in Two and Three Phase Fluidized Beds," Ph.D. Thesis, KAIST, 1989