Abstract
Fluidization is a key technology for nanoparticle handling and processing. Nanoparticles can be fluidized with forming agglomerates due to large interparticle forces. Fluidization characteristics such as bed expansion, solids volume fraction along height, and segregation in a fluidized bed are studied using three kinds of nanoparticle titanium oxides. Agglomerates formed in the bed is so hard that they are not destroyed during fluidization in cases of 7 and 20 nm particle system while bed expansion takes place. The solids volume fraction in a freeboard is increased with increasing gas velocity especially in the case of 7 nm particle system. The segregation of agglomerate takes place for all particle cases. Agglomerate size obtained from umfa tends to be larger than the volumetric average size observed. It is thought the gap between them is attributable to the gas entered inside the agglomerate.
