NUMERICAL-SIMULATION ON GAS-SOLID 2-PHASE TURBULENT-FLOW IN FCC RISERREACTORS (I) TURBULENT GAS-SOLID FLOW-REACTION MODEL

Gas-solid two-phase turbulent flows, mass transfer, heat transfer and catalytic cracking reactions are known to exert interrelated influence s in commercial fluid catalytic cracking (FCC)riser reactors. In the p resent paper, a three-dimensional turbulent gas-solid two-phase flow-r eaction model for FCC riser reactors was developed. The model took int o account the gas-solid two-phase turbulent flows, inter-phase heat tr ansfer, mass transfer, catalytic cracking reactions and their interrel ated influence. The k-V-k(p) two-phase turbulence model was employed a nd modified for the two-phase turbulent flow patterns with relatively high particle concentration. Boundary conditions for the flow-reaction model were given. Related numerical algorithm was formed and a numeri cal code was drawn up. Numerical modeling for commercial FCC riser rea ctors could be carried out with the presented model.