Effects of temperature, pressure, and interparticle forces on the hydrodynamics of a gas-solid fluidized bed

Effect of gas extraction on the hydrodynamics in a fluidized bed membrane reactor at elevated temperatures

“…According to the fluidization tests, U mf was 0.13, 0.083, and 0.035 m/s at 25°C, 300°C, and 550°C, respectively. This result agrees well with the results in previous studies and reports in spite of the difference in the diameter and material of the particles …”

“…All the aforementioned challenges depend greatly on the knowledge of hydrodynamics in FBMR. For example, the overall permeation rates of the membrane units are mainly determined by the contact efficiency between the membrane and the target gasses, which is larger related to the dynamic distribution of the emulsion phase in the bed. The abrasion and erosion effects of the particles on the membranes strongly depend on the dynamics of the moving solids in the bed .…”

Fluidization dynamics of cohesive Geldart B particles. Part I: X-ray tomography analysis

“…McLaughlin and Rhodes [16], and Wormsbecker [17] also found similar trends. In brief, the particles are more difficult to fluidize, because attenuation of kinetic energy arises upon particle collision [18] and the emulsion phase is prone to maintain a stable structure [19]. Then, extensive researches were carried out to study the fluidization dynamics of cohesive particles by changing the cohesive force within a low level.…”

Fluidization dynamics of cohesive Geldart B particles. Part II: Pressure fluctuation analysis

“…In many applications of fluidized reactors, the particles are cohesive. Cohesive particles show different fluidization behaviors as compared to non-cohesive system [1], particularly for the highly cohesive bed where sever agglomeration takes place, causing partial or complete failure of fluidization [2,3]. Therefore, it is attractive to obtain more insight into the underlying mechanisms, based on which the processing of cohesive particulate systems could be optimized.…”