Fluidization behavior of binary mixtures of nanoparticles in vibro-fluidized bed

• The binary mixture nanoparticles can be fluidized normally in a vibro-fluidized bed.
• The fluidized system of mixed nanoparticles are more complicated than that of the single particles.
• The Richardson–Zaki analyses are used to assess the particulate fluidization degree of mixing nanoparticles.

The fluidization behavior of different mixed SiO2, TiO2 and/or ZnO nanoparticles under the application of vibrated fields of constant vibrated frequencies (40 Hz) and amplitude (3.0 mm) is studied. The single nanoparticles experiments show that SiO2 nanoparticles have a better fluidization quality than TiO2 and ZnO nanoparticles. For binary mixtures of the nanoparticles, the amount of SiO2 nanoparticles generally has a beneficial effect on the fluidization quality of the binary mixtures. Using the linear regression, the Richardson–Zaki exponents of three kinds single and their binary mixture of nanoparticles are calculated. The Richardson–Zaki analyses indicate that the particulate fluidization degree of mixed nanoparticles can be greatly improved in agglomerate particulate fluidization (APF) behavior.

Bed voidage vs. superficial gas velocity for the mixtures of SiO2 and ZnO nanoparticles.Figure optionsDownload as PowerPoint slide