공업적인 충전탑내의 유동현상을 재현하도록 고안된 소규모의 탑을 사용하여 acetone-ethylformate의 이성분계에 대한 증류실험을 함으로써 물질전달계수에 미치는 원주형충전물의 길이의 영향을 고찰하였다. 실측된 총괄물질전달계수와 충전물의 길이 사이의 관계가 정상적인인 식으로 도출되었으며 물질전달에 대한 액상의 저항은 무시될 정도의 크기였고 물질전달계수의 값이 충전물의길이에 따라 달라져 가는 거동은 penetration theory를 기상에 적용함으로써 잘 설명되었다.

The effect of packing material length on mass transfer coefficient was studied for distillation experiments of binary system, acetone-ethylformate, in a 26 ㎜ I.D. laboratory column designed to simulate the flow characteristics of an industrial packed column. Overall mass transfer coefficients were obtained from the experiments on 4 different types of packings and an empirical correlation was proposed between overall coefficient and packing size. The analysis of the experimental result showed that the resistance in liquid phase was negligible and that the variation of individual mass transfer coefficients owing to different packing size could be well explained by an application of penetration theory to gas phase.