STUDIES OF MIXING IN A CONCENTRIC TUBE AIR-LIFT REACTOR CONTAINING XANTHAN GUM BY MEANS OF AN IMPROVED FLOW FOLLOWER

被引：22

作者：

Fields, P. R. ^{[1
]}

Mitchell, F. R. G. ^{[1
]}

Slater, N. K. H. ^{[1
]}

机构：

[1] Univ Cambridge, Dept Chem Engn, Cambridge CB2 3RA, England

来源：

CHEMICAL ENGINEERING COMMUNICATIONS | 1984年 / 25卷 / 1-6期

关键词：

D O I：

10.1080/00986448408940100

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

The influence of a pseudoplastic non-Newtonian fluid upon the hydrodynamic performance and mixing parameters of a concentric tube air-lift ferrnenter has been studied using a range of dilute xanthan gum solutions (0-0.5% weight by volume). Liquid circulation times vary in a complex pattern with increasing gum concentration. At low concentrations, circulation was more rapid due to drag reduction whilst at the highest concentrations circulation times were increased. The column voidage decreased with increasing gum concentration and bubbly flow in the riser was replaced by slug flow. For all gum concentrations the effective dispersion coefficient for a single passage around the loop was increased relative to tap water. An improved radio-pill flow follower system for hydrodynamic studies is described.

引用

页码：93 / 104

页数：12

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