FBR for Polyolefin Production in Gas Phase: Validation of a Two‐Phase Compartmentalized Model by Comparison with CFD

Two different modeling approaches are applied in this work to the simulation of fluidized bed reactors containing solid particles Geldart A-B type and operated at typical conditions for polyolefins production. On one side, a fully detailed computational fluid-dynamics (CFD) model is developed, considering 2D planar geometry multi-fluid description with kinetic theory granular flows. other, conventional three-phase, 1D compartmentalized (SCM) also implementing fluid dynamic based on popular, semi-empirical relationships available literature. Given huge difference effort associated corresponding numerical solutions, our aim confirm reliability simplified by comparison results CFD model. The show that oversimplified approach capable predict mixing features established inside reactor bubbling fluidization regime good non-reactive polyethylene particles. Average volume fractions particularly close values predicted when monodisperse considered examined range gas velocity values. A generally agreement found solids broad size distribution analyzed.