(751g) Numerical Simulations of PSRI Cold-Flow FCC Stripper Experiment with Subway Grating Baffles
Numerical simulations have been performed of a PSRI cold-flow FCC stripper experiment with subway grating baffles. The experimental unit has an internal diameter of 3 feet, and a height of 25 feet. The subway grating baffles within the vessel are intended to promote more uniform fluidization of particles by preventing the formation of large bubbles as well as preventing gas bypassing in the stripper. The commercial computational fluid dynamics (CFD) software Barracuda Virtual Reactor®, which implements the multi-phase particle-in-cell (MP-PIC) numerical method, was used to perform the simulations. Simulation results are compared with experimental measurements of apparent bed density over a wide range of solids flux conditions, at superficial gas velocities typical of industrial FCC stripper operation. The simulation results are in good agreement with the experimental bed density measurements, and are able to predict the experimentally observed trends of bed density variation as a function of gas superficial velocity and catalyst mass flux through the stripper vessel.
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