INTERPARTICLE FORCES IN HIGH TEMPERATURE FLUIDIZATION OF GELDART A PARTICLES

作     者：Jamal Chaouki 

作者机构：Biopro Research Centre Department of Chemical Engineering Ecole Polytechnique de Montreal C.P. 6079 succ. Centre-ville Montreal Quebec Canada H3C 3A7 

出 版 物：《China Particuology》 (CHINA PARTICUOLOGY)

年 卷 期：2004年第2卷第3期

页      面：113-118页

核心收录：

学科分类：081704[工学-应用化学] 08[工学] 0817[工学-化学工程与技术] 081701[工学-化学工程] 

主　　题：fluidization gas-solid flow structure high temperature interparticle forces 

摘      要：Previous reports and current studies show that fluidization of some Geldart A particles is enhanced by increasing bed temperature. Both the averaged local particle concentration and the particle concentration in the dense phase decrease with increasing bed temperature, at constant superficial gas velocities. However, conventional models fail to predict these changes, because the role of interparticle forces is usually neglected at different bed temperatures. Here, the interparticle forces are analyzed to explore the mechanism of gas-solid fluidization at high temperatures. Indeed, as the temperature increases, the interparticle attractive forces decrease while the interparticle repulsive forces increase. Consequently, fluidization behaviors of some Geldart A particles seem to increasingly shift from typical Geldart A towards B with increasing temperature.