Table 1.

Comparison of the fluidization behavior of APF and ABF (based on Wang et al. 2002)

	APF	ABF
Primary particle size	Nanoparticles	Micro-, Submicro-, Nanoparticles
Bulk density	Low (<100 kg/m3)	High (>100 kg/m3)
Fluidization characteristics	1. Bubbleless	1. With bubbles
	2. With high bed expansion ratio	2. With low bed expansion ratio
	3. Agglomerates uniformly distributed in the bed	3. Large agglomerates at the bottoms of the bed, with small ones on the top
	4. Fluidized bed homogeneously expands, and the bed density decreases with increasing U g	4. Bed expansion ratio and emulsion phase density do not change much with increasing U g
Graphic representation