Hydrodynamic Characteristics of a Gas Li

Hydrodynamic characteristics were investigated in a cocurrent gas-liquid-solid fluidized bed containing a binary mixture of particles. The study aimed to understand the effects of particle size and density on hydrodynamic behavior in the bed. Various combinations of eight types of spherical particles differing in diameter and/or density were employed in the experiments. The results revealed that density variation had a more significant impact on solids mixing and segregation than particle size variation. Additionally, phenomena such as solids layer inversion were observed with specific combinations of heavy and light beads. The relationship between the minimum fluidization velocity and other relevant parameters was empirically analyzed, finding correlations with superficial gas velocity and weight fractions of jetsam and flotsam particles. Bed expansion and gas holdup were also assessed under three solids mixing states: complete segregation, partial intermixing, and complete intermixing. The findings indicated that the serial model accurately predicts bed voidage, even in complete intermixing conditions. This research contributes to the understanding and optimization of three-phase reactors utilized in various chemical processes.