Computational fluid dynamics simulation of methanol to olefins in stage circulating fluidized bed riser: Effect of reactor stage parameters on product yields

Hydrodynamics Behavior of Ternary Biomass Mixtures with Silica Sand in Fluidized Beds: Experiment and Artificial Neural Network Model Development

“…Because silica sand is a Geldart B medium particle, it is easier to fluidize. On a further increase in U g , the collisions with the silica particles assist the biomass particles to fluidize with greater ease. , To ensure that the biomass was adequately fluidized, it was mixed with a fluidizing agent (medium, usually sand) to give a biomass weight fraction in the range of 1–3%. , …”

“…Pressure drop per unit height against superficial gas velocity curves of total biomass mixture mass fraction ( x b ) = 0.1 with different biomass compositions …”

“…Cluster and channel formation of the biomass mixture with silica sand: (a) front view, (b) top view in the fluidized procedure, and then (c) complete fluidization …”

“…Schematic diagram of (a) the acrylic plexiglass fluidized bed column and (b) the experimental fluidization system used in the experiment …”

Fast Pyrolysis Downer Reactor: Effect of Reactor Geometry on the Hydrodynamics

“…This hydrodynamics behavior would fit for a fast reaction that needs system fluctuation. Meanwhile, the tapered-in downer reactor gave a lower standard deviation of the radial solid volume fraction that means a more uniform solid distribution or higher system contacting time in the system , that would be proper for low reaction rate characteristics. It can be explained by the changing of pressure drops in the system with the cross-sectional area and the tapered downer reactor height .…”