Effect of particle-size distribution on the axial dispersion of liquids in packed beds

被引：0

作者：

Shibuya, Hiromitsu ^{[1
]}

Uraguchi, Yuzo ^{[1
]}

Miyauchi, Terukatsu ^{[1
]}

机构：

[1] Dept. Of Chem. Eng, Univ. Of Tokyo, Tokyo,113, Japan

来源：

Kagaku Kogaku Ronbunshu | 1978年 / 4卷 / 06期

关键词：

Pressure drop - Biofuels - Liquids - Drops - Dispersions - Particle size - Light transmission - Packed beds - Size distribution;

D O I：

10.1252/kakoronbunshu.4.615

中图分类号：

学科分类号：

摘要：

The effect of particle-size distribution on axial dispersion of liquids in packed beds was investigated using pulse response measurements, visual observation of liquid flow through two-dimensional packed beds, and pressure drop measurements. For beds of particles having narrow particle-size distribution (i.e. coefficient of variation of particle diameter n1 less than 8 %), axial dispersion data were correlated by the plots of Péclet number of axial dispersion Pezh vs. Péclet number of molecular diffusion Pemh, showing clear dependence on particle diameter. The values of Pezh can be calculated by use of an agglomeration model associated with whiskers observed from visualization tests. The model parameters were given diagrammatically. For beds of particles having wide particle-size distribution (n1 >10 %), the slopes of the plots of Pezh vs. PeMh showed slight dependence on n1 and were all less than those in beds of particles having narrow particle-size distribution. This behavior of the plots coincided with the observed results for visualized liquid flow and with the results of pressure drop measurements. © 1978, Society of Chemical Engineers, Japan. All rights reserved.

引用

页码：615 / 621