Slip Velocity in Downer Reactors: Drag Coefficient and the Influence of Operational Variables

被引：16

作者：

Islam, Mohammad Ashraful ^{[1
]}

Krol, Stefan ^{[1
]}

de Lasa, Hugo I. ^{[1
]}

机构：

[1] Univ Western Ontario, Dept Chem & Biochem Engn, Fac Engn, Chem Reactor Engn Ctr, London, ON N6A 5B9, Canada

来源：

INDUSTRIAL & ENGINEERING CHEMISTRY RESEARCH | 2010年 / 49卷 / 15期

关键词：

CIRCULATING FLUIDIZED-BED; NONSPHERICAL PARTICLES; FLOW REACTORS; HYDRODYNAMICS; PREDICTION; MOTION; SPHERE; SHAPE; SIZE;

D O I：

10.1021/ie901466p

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

Cluster formation in downer reactors is considered a most important factor influencing slip velocity between the flowing phases. This study investigates the formation of clusters using CREC-GS-Optiprobes. This probe is a nonintrusive device that records information from a well-defined optical measuring volume. This probe can provide accurate measurements tracking closely gas-solid flows in downer units. This study shows that cluster drag coefficients can be correlated as function of both Reynolds number and number of particles contained in agglomerates. This yields a close to linear relationship between cluster size and average slip velocity.

引用

页码：6735 / 6744

页数：10

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