The model prediction of solid phase hydrodynamics in FCC riser feed injection zones

•Model was based on uniform radial distribution of energy density of solid phase.•Hydrodynamics in riser injection zone was well predicted by a basic model.•The model was simplified and extended for prediction of the whole injection zone

The research regarding particle concentration and particle velocity in Fluid Catalytic Cracking (FCC) riser feed injection zones is of great importance for FCC riser reactor design. In this study, the result of experiment data showed that the particle phase energy density was almost kept constant along radial direction in riser feed injection zone. Based on that, a basic model was proposed to predict particle concentration and particle velocity in an FCC riser feed injection zone. The average prediction deviations of the basic model were 12.00% and 5.71% for the particle concentration and particle velocity, respectively, under the experimental operating conditions. The basic model was simplified for conciseness purposes in the radial position r/R = 0–0.7. The average deviations after simplification were 11.64% and 11.41% for the particle concentration and particle velocity, respectively, in the radial position r/R = 0–0.7, under experimental operating conditions.

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