Computational fluid-particle dynamics for the flame synthesis of alumina particles

被引：116

作者：

Johannessen, T

Pratsinis, SE

Livbjerg, H ^{[1
]}

机构：

[1] Tech Univ Denmark, Dept Chem Engn, DK-2800 Lyngby, Denmark

[2] Swiss Fed Inst Technol, Inst Proc Engn, CH-8092 Zurich, Switzerland

来源：

CHEMICAL ENGINEERING SCIENCE | 2000年 / 55卷 / 01期

关键词：

D O I：

10.1016/S0009-2509(99)00183-9

中图分类号：

TQ [化学工业];

学科分类号：

0817 ;

摘要：

A mathematical model for the dynamics of particle growth during synthesis of ultra fine particles in diffusion flames is presented. The model includes the kinetics of particle coalescence and coagulation, and when combined with a calculation of the temperature, velocity and gas composition distribution in the flame, the effluent aerosol characteristics are calculated. The model is validated by comparison with an experimental study of the synthesis of alumina particles by combustion of Al-tri-sec-butoxide. Two parameters of the coalescence kinetics are estimated by regression of the model predictions to the measured specific surface area of the product particles. The estimated kinetics can be used to predict the surface area and shape of the particles for a wide range of synthesis conditions. (C) 1999 Elsevier Science Ltd. All rights reserved.

引用

页码：177 / 191

页数：15

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