Abstract:

Three-dimensional numerical simulations of bubble column reactors with different nozzles or distributors were conducted using Euler-Euler multiphase model and RNG k-ε turbulence model. The gas holdup and axial liquid velocity in reactors were analyzed and compared. The results indicate that the liquid circulation flow is formed in all reactors. Venturi nozzle and multi-nozzle are proved to be more effective than single-nozzle. A uniform gas holdup distribution and a large-scale liquid circulation can be provided by ring and calandria liquid distributors, indicating the better performance than that of three nozzles tested.

Key words: bubble column reactor, nozzle, distributor, numerical simulation