1977 Volume 3 Issue 4 Pages 406-410
Studies on liquid mixing and particle bed expansion in a gas-liquid cocurrent up-flow column were made under the condition that packing particles were in the state ranging from subsided state to fluidized state and also in a fixed state.
Spherical glass particles with average diameters of 0.15, 0.20, 0.28 and 0.43 cm were used as packing particles. Superficial liquid and gas velocities based on an empty column were 0.64.3 cm/sec and 06.3 cm/sec, respectively. Péclet number for liquid mixing, (Pe) l, was found to have an approximately constant value of 1.2 under the condition that the particle bed was in the fixed state or that the value of ul/ulmf was below 0.35 in the free state. This value of (Pe) l was significantly larger than those reported in literatures on liquid mixing in cocurrent or countercurrent liquid down-flow packed beds.
Under the condition that the particle bed expanded, the value of (Pe) l decreased with the increase of bed expansion. Liquid mixing in upward liquid single flow through packed and fluidized beds was also studied and discussed in comparison with that in downward single flow.
