Ten Lump Reaction Scheme 2 Fluidized Bed Reactor. Reynolds-Averaged

A part of the bottom section of a fluidized bed catalytic cracker was simulated in 2D using the Eulerian-Eulerian gas-solid flow model presented in Section 13.7 and the 10-lump kinetic model of Jacob et al. [1976] introduced in Section 13.8.1. The simulations aimed at illustrating to what extent a model of this type is capable of describing the details and dynamics of the complex gas-solid flow and species fields. 

The simulation domain was 0.4 m wide and 1.0 m high. The gas oil, with composition shown in Table 13.8.2.1-1, is injected uniformly through the bottom. The catalyst is injected via lateral inlets at the bottom. Its coke content is 1 wt-%. Gas and catalyst exit via the top. The other operating conditions and the catalyst properties are similar to those used in Section 13.8.2.1. 

The calculation of the details and dynamics of the fluctuations around the statistically stationary state, resulting from the formation of meso-scale structures 

2D Eulerian-Eulerian simulation of fluid catalytic cracking of gas oil. Snapshot of fluctuations around the statistically stationary flow field, (a) Solids volume fraction profile and (b) solids velocity field. 

2D Eulerian-Eulerian simulation of fluid catalytic cracking of gas oil. Snapshot of fluctuations around the statistically stationary species field. Mass fraction in the gas phase (a) gasoil fraction of the feed, (b) gasoline fraction in the product, (c) Transient calculation of the meso-scale fluctuations around a statistically stationary state solids volume fraction and axial velocity at 0.1 m from the wall and 0.25 m from the bottom. 

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