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测定了小颗粒固定床吸附器中的液体轴向扩散系数，提出轴向扩散系数与颗粒大小和流速的关联式，证明了有吸附存在时该关联式仍然适用．说明了小颗粒低流速时轴向扩散对传递过程的影响不可随意忽略，尤其在吸附作用较弱时
The axial diffusion coefficient of liquid in small particle fixed bed adsorber was measured and the relation between axial diffusion coefficient and particle size and flow rate was proposed. It is proved that the correlation still applies when there is adsorption. It is shown that the influence of axial diffusion of small particles on the transfer process can not be neglected, especially when the adsorption is weak