The use of a diffusive-type model to represent the behaviour of solid particles in a slurry bubble column has been questioned. In agreement with the observation of Levenspiel and Fitzgerald, a sedimentation-convection model for solid behaviour in slurry bubble columns is presented. With this model, the analytical solution for axial solid concentration for monodispersed particles in a slurry bubble column at steady state for the continuous flow of slurry and gas is derived to be: Cs = U1Csf/(U1 ± Vp). The use of the model together with the correlations of Ramachandran and Chaudhari for particle settling velocity in slurry bubble columns has been found to well predict the solid hold-up in the monodispersed solid systems of Bhaga and Weber and also in the polydispersed solid systems operated in both cocurrent and countercurrent mode.
All Science Journal Classification (ASJC) codes
- Chemical Engineering(all)
- Energy Engineering and Power Technology
- Industrial and Manufacturing Engineering